upgraded to FLANN 1.6. Added miniflann interface, which is now used in the rest of OpenCV. Added Python bindings for FLANN.

modules/features2d/include/opencv2/features2d/features2d.hpp

@@ -44,7 +44,7 @@
 #define __OPENCV_FEATURES_2D_HPP__
 
 #include "opencv2/core/core.hpp"
-#include "opencv2/flann/flann.hpp"
+#include "opencv2/flann/miniflann.hpp"
 
 #ifdef __cplusplus
 #include <limits>

modules/features2d/src/matchers.cpp

@@ -603,7 +603,7 @@ void FlannBasedMatcher::radiusMatchImpl( const Mat& queryDescriptors, vector<vec
         Mat queryDescriptorsRow = queryDescriptors.row(qIdx);
         Mat indicesRow = indices.row(qIdx);
         Mat distsRow = dists.row(qIdx);
-        flannIndex->radiusSearch( queryDescriptorsRow, indicesRow, distsRow, maxDistance*maxDistance, *searchParams );
+        flannIndex->radiusSearch( queryDescriptorsRow, indicesRow, distsRow, maxDistance*maxDistance, count, *searchParams );
     }
 
     convertToDMatches( mergedDescriptors, indices, dists, matches );

modules/features2d/test/test_nearestneighbors.cpp

@@ -405,14 +405,14 @@ int CV_FlannTest::radiusSearch( Mat& points, Mat& neighbors )
         // 1st way
         Mat p( 1, points.cols, CV_32FC1, points.ptr<float>(i) ),
             n( 1, neighbors.cols, CV_32SC1, neighbors.ptr<int>(i) );
-        index->radiusSearch( p, n, dist, radius, SearchParams() );
+        index->radiusSearch( p, n, dist, radius, neighbors.cols, SearchParams() );
 
         // 2nd way
         float* fltPtr = points.ptr<float>(i);
         vector<float> query( fltPtr, fltPtr + points.cols );
         vector<int> indices( neighbors1.cols, 0 );
         vector<float> dists( dist.cols, 0 );
-        index->radiusSearch( query, indices, dists, radius, SearchParams() );
+        index->radiusSearch( query, indices, dists, radius, neighbors.cols, SearchParams() );
         vector<int>::const_iterator it = indices.begin();
         for( j = 0; it != indices.end(); ++it, j++ )
             neighbors1.at<int>(i,j) = *it;

modules/flann/include/opencv2/flann/all_indices.h

@@ -27,50 +27,129 @@
  *************************************************************************/
 
 
-#ifndef _OPENCV_ALL_INDICES_H_
+#ifndef OPENCV_FLANN_ALL_INDICES_H_
-#define _OPENCV_ALL_INDICES_H_
+#define OPENCV_FLANN_ALL_INDICES_H_
 
-#include "opencv2/flann/general.h"
+#include "general.h"
 
-#include "opencv2/flann/nn_index.h"
+#include "nn_index.h"
-#include "opencv2/flann/kdtree_index.h"
+#include "kdtree_index.h"
-#include "opencv2/flann/kmeans_index.h"
+#include "kdtree_single_index.h"
-#include "opencv2/flann/composite_index.h"
+#include "kmeans_index.h"
-#include "opencv2/flann/linear_index.h"
+#include "composite_index.h"
-#include "opencv2/flann/autotuned_index.h"
+#include "linear_index.h"
+#include "hierarchical_clustering_index.h"
+#include "lsh_index.h"
+#include "autotuned_index.h"
 
-namespace cvflann 
+
+namespace cvflann
 {
 
-template<typename T>
+template<typename KDTreeCapability, typename VectorSpace, typename Distance>
-NNIndex<T>* create_index_by_type(const Matrix<T>& dataset, const IndexParams& params)
+struct index_creator
 {
-	flann_algorithm_t index_type = params.getIndexType();
+    static NNIndex<Distance>* create(const Matrix<typename Distance::ElementType>& dataset, const IndexParams& params, const Distance& distance)
+    {
+        flann_algorithm_t index_type = get_param<flann_algorithm_t>(params, "algorithm");
 
-	NNIndex<T>* nnIndex;
+        NNIndex<Distance>* nnIndex;
-	switch (index_type) {
+        switch (index_type) {
-	case FLANN_INDEX_LINEAR:
+        case FLANN_INDEX_LINEAR:
-		nnIndex = new LinearIndex<T>(dataset, (const LinearIndexParams&)params);
+            nnIndex = new LinearIndex<Distance>(dataset, params, distance);
-		break;
+            break;
-	case FLANN_INDEX_KDTREE:
+        case FLANN_INDEX_KDTREE_SINGLE:
-		nnIndex = new KDTreeIndex<T>(dataset, (const KDTreeIndexParams&)params);
+            nnIndex = new KDTreeSingleIndex<Distance>(dataset, params, distance);
-		break;
+            break;
-	case FLANN_INDEX_KMEANS:
+        case FLANN_INDEX_KDTREE:
-		nnIndex = new KMeansIndex<T>(dataset, (const KMeansIndexParams&)params);
+            nnIndex = new KDTreeIndex<Distance>(dataset, params, distance);
-		break;
+            break;
-	case FLANN_INDEX_COMPOSITE:
+        case FLANN_INDEX_KMEANS:
-		nnIndex = new CompositeIndex<T>(dataset, (const CompositeIndexParams&) params);
+            nnIndex = new KMeansIndex<Distance>(dataset, params, distance);
-		break;
+            break;
-	case FLANN_INDEX_AUTOTUNED:
+        case FLANN_INDEX_COMPOSITE:
-		nnIndex = new AutotunedIndex<T>(dataset, (const AutotunedIndexParams&) params);
+            nnIndex = new CompositeIndex<Distance>(dataset, params, distance);
-		break;
+            break;
-	default:
+        case FLANN_INDEX_AUTOTUNED:
-		throw FLANNException("Unknown index type");
+            nnIndex = new AutotunedIndex<Distance>(dataset, params, distance);
-	}
+            break;
+        case FLANN_INDEX_HIERARCHICAL:
+            nnIndex = new HierarchicalClusteringIndex<Distance>(dataset, params, distance);
+            break;
+        case FLANN_INDEX_LSH:
+            nnIndex = new LshIndex<Distance>(dataset, params, distance);
+            break;
+        default:
+            throw FLANNException("Unknown index type");
+        }
 
-	return nnIndex;
+        return nnIndex;
+    }
+};
+
+template<typename VectorSpace, typename Distance>
+struct index_creator<False,VectorSpace,Distance>
+{
+    static NNIndex<Distance>* create(const Matrix<typename Distance::ElementType>& dataset, const IndexParams& params, const Distance& distance)
+    {
+        flann_algorithm_t index_type = get_param<flann_algorithm_t>(params, "algorithm");
+
+        NNIndex<Distance>* nnIndex;
+        switch (index_type) {
+        case FLANN_INDEX_LINEAR:
+            nnIndex = new LinearIndex<Distance>(dataset, params, distance);
+            break;
+        case FLANN_INDEX_KMEANS:
+            nnIndex = new KMeansIndex<Distance>(dataset, params, distance);
+            break;
+        case FLANN_INDEX_HIERARCHICAL:
+            nnIndex = new HierarchicalClusteringIndex<Distance>(dataset, params, distance);
+            break;
+        case FLANN_INDEX_LSH:
+            nnIndex = new LshIndex<Distance>(dataset, params, distance);
+            break;
+        default:
+            throw FLANNException("Unknown index type");
+        }
+
+        return nnIndex;
+    }
+};
+
+template<typename Distance>
+struct index_creator<False,False,Distance>
+{
+    static NNIndex<Distance>* create(const Matrix<typename Distance::ElementType>& dataset, const IndexParams& params, const Distance& distance)
+    {
+        flann_algorithm_t index_type = get_param<flann_algorithm_t>(params, "algorithm");
+
+        NNIndex<Distance>* nnIndex;
+        switch (index_type) {
+        case FLANN_INDEX_LINEAR:
+            nnIndex = new LinearIndex<Distance>(dataset, params, distance);
+            break;
+        case FLANN_INDEX_HIERARCHICAL:
+            nnIndex = new HierarchicalClusteringIndex<Distance>(dataset, params, distance);
+            break;
+        case FLANN_INDEX_LSH:
+            nnIndex = new LshIndex<Distance>(dataset, params, distance);
+            break;
+        default:
+            throw FLANNException("Unknown index type");
+        }
+
+        return nnIndex;
+    }
+};
+
+template<typename Distance>
+NNIndex<Distance>* create_index_by_type(const Matrix<typename Distance::ElementType>& dataset, const IndexParams& params, const Distance& distance)
+{
+    return index_creator<typename Distance::is_kdtree_distance,
+                         typename Distance::is_vector_space_distance,
+                         Distance>::create(dataset, params,distance);
 }
 
-} //namespace cvflann
+}
 
-#endif /* _OPENCV_ALL_INDICES_H_ */
+#endif /* OPENCV_FLANN_ALL_INDICES_H_ */

modules/flann/include/opencv2/flann/allocator.h

@@ -28,12 +28,13 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_ALLOCATOR_H_
+#ifndef OPENCV_FLANN_ALLOCATOR_H_
-#define _OPENCV_ALLOCATOR_H_
+#define OPENCV_FLANN_ALLOCATOR_H_
 
 #include <stdlib.h>
 #include <stdio.h>
 
+
 namespace cvflann
 {
 
@@ -47,8 +48,8 @@ namespace cvflann
 template <typename T>
 T* allocate(size_t count = 1)
 {
-	T* mem = (T*) ::malloc(sizeof(T)*count);
+    T* mem = (T*) ::malloc(sizeof(T)*count);
-	return mem;
+    return mem;
 }
 
 
@@ -70,118 +71,118 @@ T* allocate(size_t count = 1)
 const size_t     WORDSIZE=16;
 const  size_t     BLOCKSIZE=8192;
 
-class CV_EXPORTS PooledAllocator
+class PooledAllocator
 {
-	/* We maintain memory alignment to word boundaries by requiring that all
+    /* We maintain memory alignment to word boundaries by requiring that all
-		allocations be in multiples of the machine wordsize.  */
+        allocations be in multiples of the machine wordsize.  */
-	  /* Size of machine word in bytes.  Must be power of 2. */
+    /* Size of machine word in bytes.  Must be power of 2. */
-	/* Minimum number of bytes requested at a time from	the system.  Must be multiple of WORDSIZE. */
+    /* Minimum number of bytes requested at a time from	the system.  Must be multiple of WORDSIZE. */
 
 
-	int 	remaining;  /* Number of bytes left in current block of storage. */
+    int     remaining;  /* Number of bytes left in current block of storage. */
-	void*	base;     /* Pointer to base of current block of storage. */
+    void*   base;     /* Pointer to base of current block of storage. */
-	void*	loc;      /* Current location in block to next allocate memory. */
+    void*   loc;      /* Current location in block to next allocate memory. */
-	int 	blocksize;
+    int     blocksize;
 
 
 public:
-	int 	usedMemory;
+    int     usedMemory;
-	int 	wastedMemory;
+    int     wastedMemory;
 
-	/**
+    /**
-		Default constructor. Initializes a new pool.
+        Default constructor. Initializes a new pool.
-	*/
+     */
-	PooledAllocator(int blocksize = BLOCKSIZE)
+    PooledAllocator(int blocksize = BLOCKSIZE)
-	{
+    {
-    	this->blocksize = blocksize;
+        this->blocksize = blocksize;
-		remaining = 0;
+        remaining = 0;
-		base = NULL;
+        base = NULL;
 
-		usedMemory = 0;
+        usedMemory = 0;
-		wastedMemory = 0;
+        wastedMemory = 0;
-	}
+    }
 
-	/**
+    /**
-	 * Destructor. Frees all the memory allocated in this pool.
+     * Destructor. Frees all the memory allocated in this pool.
-	 */
+     */
- 	~PooledAllocator()
+    ~PooledAllocator()
-	{
+    {
-		void *prev;
+        void* prev;
 
-		while (base != NULL) {
+        while (base != NULL) {
-			prev = *((void **) base);  /* Get pointer to prev block. */
+            prev = *((void**) base); /* Get pointer to prev block. */
-			::free(base);
+            ::free(base);
-			base = prev;
+            base = prev;
-		}
+        }
-	}
+    }
 
-	/**
+    /**
-	 * Returns a pointer to a piece of new memory of the given size in bytes
+     * Returns a pointer to a piece of new memory of the given size in bytes
-	 * allocated from the pool.
+     * allocated from the pool.
-	 */
+     */
-	void* allocateBytes(int size)
+    void* allocateMemory(int size)
-	{
+    {
-		int blocksize;
+        int blocksize;
 
-		/* Round size up to a multiple of wordsize.  The following expression
+        /* Round size up to a multiple of wordsize.  The following expression
-			only works for WORDSIZE that is a power of 2, by masking last bits of
+            only works for WORDSIZE that is a power of 2, by masking last bits of
-			incremented size to zero.
+            incremented size to zero.
-		*/
+         */
-		size = (size + (WORDSIZE - 1)) & ~(WORDSIZE - 1);
+        size = (size + (WORDSIZE - 1)) & ~(WORDSIZE - 1);
 
-		/* Check whether a new block must be allocated.  Note that the first word
+        /* Check whether a new block must be allocated.  Note that the first word
-			of a block is reserved for a pointer to the previous block.
+            of a block is reserved for a pointer to the previous block.
-		*/
+         */
-		if (size > remaining) {
+        if (size > remaining) {
 
-			wastedMemory += remaining;
+            wastedMemory += remaining;
 
-		/* Allocate new storage. */
+            /* Allocate new storage. */
-			blocksize = (size + sizeof(void*) + (WORDSIZE-1) > BLOCKSIZE) ?
+            blocksize = (size + sizeof(void*) + (WORDSIZE-1) > BLOCKSIZE) ?
-						size + sizeof(void*) + (WORDSIZE-1) : BLOCKSIZE;
+                        size + sizeof(void*) + (WORDSIZE-1) : BLOCKSIZE;
 
-			// use the standard C malloc to allocate memory
+            // use the standard C malloc to allocate memory
-			void* m = ::malloc(blocksize);
+            void* m = ::malloc(blocksize);
-			if (!m) {
+            if (!m) {
                 fprintf(stderr,"Failed to allocate memory.\n");
-                exit(1);
+                return NULL;
-			}
+            }
 
-			/* Fill first word of new block with pointer to previous block. */
+            /* Fill first word of new block with pointer to previous block. */
-			((void **) m)[0] = base;
+            ((void**) m)[0] = base;
-			base = m;
+            base = m;
 
-			int shift = 0;
+            int shift = 0;
-			//int shift = (WORDSIZE - ( (((size_t)m) + sizeof(void*)) & (WORDSIZE-1))) & (WORDSIZE-1);
+            //int shift = (WORDSIZE - ( (((size_t)m) + sizeof(void*)) & (WORDSIZE-1))) & (WORDSIZE-1);
 
-			remaining = blocksize - sizeof(void*) - shift;
+            remaining = blocksize - sizeof(void*) - shift;
-			loc = ((char*)m + sizeof(void*) + shift);
+            loc = ((char*)m + sizeof(void*) + shift);
-		}
+        }
-		void* rloc = loc;
+        void* rloc = loc;
-		loc = (char*)loc + size;
+        loc = (char*)loc + size;
-		remaining -= size;
+        remaining -= size;
 
-		usedMemory += size;
+        usedMemory += size;
 
-		return rloc;
+        return rloc;
-	}
+    }
 
-	/**
+    /**
-	 * Allocates (using this pool) a generic type T.
+     * Allocates (using this pool) a generic type T.
-	 *
+     *
-	 * Params:
+     * Params:
-	 *     count = number of instances to allocate.
+     *     count = number of instances to allocate.
-	 * Returns: pointer (of type T*) to memory buffer
+     * Returns: pointer (of type T*) to memory buffer
-	 */
+     */
     template <typename T>
-	T* allocate(size_t count = 1)
+    T* allocate(size_t count = 1)
-	{
+    {
-		T* mem = (T*) this->allocateBytes((int)(sizeof(T)*count));
+        T* mem = (T*) this->allocateMemory((int)(sizeof(T)*count));
-		return mem;
+        return mem;
-	}
+    }
 
 };
 
-} // namespace cvflann
+}
 
-#endif //_OPENCV_ALLOCATOR_H_
+#endif //OPENCV_FLANN_ALLOCATOR_H_

modules/flann/include/opencv2/flann/any.h

@@ -0,0 +1,284 @@
+#ifndef OPENCV_FLANN_ANY_H_
+#define OPENCV_FLANN_ANY_H_
+/*
+ * (C) Copyright Christopher Diggins 2005-2011
+ * (C) Copyright Pablo Aguilar 2005
+ * (C) Copyright Kevlin Henney 2001
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE_1_0.txt or copy at
+ * http://www.boost.org/LICENSE_1_0.txt
+ *
+ * Adapted for FLANN by Marius Muja
+ */
+
+#include <stdexcept>
+#include <ostream>
+#include <typeinfo>
+
+namespace cdiggins
+{
+
+namespace anyimpl
+{
+
+struct bad_any_cast
+{
+};
+
+struct empty_any
+{
+};
+
+struct base_any_policy
+{
+    virtual void static_delete(void** x) = 0;
+    virtual void copy_from_value(void const* src, void** dest) = 0;
+    virtual void clone(void* const* src, void** dest) = 0;
+    virtual void move(void* const* src, void** dest) = 0;
+    virtual void* get_value(void** src) = 0;
+    virtual size_t get_size() = 0;
+    virtual const std::type_info& type() = 0;
+    virtual void print(std::ostream& out, void* const* src) = 0;
+};
+
+template<typename T>
+struct typed_base_any_policy : base_any_policy
+{
+    virtual size_t get_size() { return sizeof(T); }
+    virtual const std::type_info& type() { return typeid(T); }
+
+};
+
+template<typename T>
+struct small_any_policy : typed_base_any_policy<T>
+{
+    virtual void static_delete(void**) { }
+    virtual void copy_from_value(void const* src, void** dest)
+    {
+        new (dest) T(* reinterpret_cast<T const*>(src));
+    }
+    virtual void clone(void* const* src, void** dest) { *dest = *src; }
+    virtual void move(void* const* src, void** dest) { *dest = *src; }
+    virtual void* get_value(void** src) { return reinterpret_cast<void*>(src); }
+    virtual void print(std::ostream& out, void* const* src) { out << *reinterpret_cast<T const*>(src); }
+};
+
+template<typename T>
+struct big_any_policy : typed_base_any_policy<T>
+{
+    virtual void static_delete(void** x)
+    {
+        if (* x) delete (* reinterpret_cast<T**>(x)); *x = NULL;
+    }
+    virtual void copy_from_value(void const* src, void** dest)
+    {
+        *dest = new T(*reinterpret_cast<T const*>(src));
+    }
+    virtual void clone(void* const* src, void** dest)
+    {
+        *dest = new T(**reinterpret_cast<T* const*>(src));
+    }
+    virtual void move(void* const* src, void** dest)
+    {
+        (*reinterpret_cast<T**>(dest))->~T();
+        **reinterpret_cast<T**>(dest) = **reinterpret_cast<T* const*>(src);
+    }
+    virtual void* get_value(void** src) { return *src; }
+    virtual void print(std::ostream& out, void* const* src) { out << *reinterpret_cast<T const*>(*src); }
+};
+
+template<typename T>
+struct choose_policy
+{
+    typedef big_any_policy<T> type;
+};
+
+template<typename T>
+struct choose_policy<T*>
+{
+    typedef small_any_policy<T*> type;
+};
+
+struct any;
+
+/// Choosing the policy for an any type is illegal, but should never happen.
+/// This is designed to throw a compiler error.
+template<>
+struct choose_policy<any>
+{
+    typedef void type;
+};
+
+/// Specializations for small types.
+#define SMALL_POLICY(TYPE) \
+    template<> \
+    struct choose_policy<TYPE> { typedef small_any_policy<TYPE> type; \
+    };
+
+SMALL_POLICY(signed char);
+SMALL_POLICY(unsigned char);
+SMALL_POLICY(signed short);
+SMALL_POLICY(unsigned short);
+SMALL_POLICY(signed int);
+SMALL_POLICY(unsigned int);
+SMALL_POLICY(signed long);
+SMALL_POLICY(unsigned long);
+SMALL_POLICY(float);
+SMALL_POLICY(bool);
+
+#undef SMALL_POLICY
+
+/// This function will return a different policy for each type.
+template<typename T>
+base_any_policy* get_policy()
+{
+    static typename choose_policy<T>::type policy;
+    return &policy;
+}
+} // namespace anyimpl
+
+struct any
+{
+private:
+    // fields
+    anyimpl::base_any_policy* policy;
+    void* object;
+
+public:
+    /// Initializing constructor.
+    template <typename T>
+    any(const T& x)
+        : policy(anyimpl::get_policy<anyimpl::empty_any>()), object(NULL)
+    {
+        assign(x);
+    }
+
+    /// Empty constructor.
+    any()
+        : policy(anyimpl::get_policy<anyimpl::empty_any>()), object(NULL)
+    { }
+
+    /// Special initializing constructor for string literals.
+    any(const char* x)
+        : policy(anyimpl::get_policy<anyimpl::empty_any>()), object(NULL)
+    {
+        assign(x);
+    }
+
+    /// Copy constructor.
+    any(const any& x)
+        : policy(anyimpl::get_policy<anyimpl::empty_any>()), object(NULL)
+    {
+        assign(x);
+    }
+
+    /// Destructor.
+    ~any()
+    {
+        policy->static_delete(&object);
+    }
+
+    /// Assignment function from another any.
+    any& assign(const any& x)
+    {
+        reset();
+        policy = x.policy;
+        policy->clone(&x.object, &object);
+        return *this;
+    }
+
+    /// Assignment function.
+    template <typename T>
+    any& assign(const T& x)
+    {
+        reset();
+        policy = anyimpl::get_policy<T>();
+        policy->copy_from_value(&x, &object);
+        return *this;
+    }
+
+    /// Assignment operator.
+    template<typename T>
+    any& operator=(const T& x)
+    {
+        return assign(x);
+    }
+
+    /// Assignment operator, specialed for literal strings.
+    /// They have types like const char [6] which don't work as expected.
+    any& operator=(const char* x)
+    {
+        return assign(x);
+    }
+
+    /// Utility functions
+    any& swap(any& x)
+    {
+        std::swap(policy, x.policy);
+        std::swap(object, x.object);
+        return *this;
+    }
+
+    /// Cast operator. You can only cast to the original type.
+    template<typename T>
+    T& cast()
+    {
+        if (policy->type() != typeid(T)) throw anyimpl::bad_any_cast();
+        T* r = reinterpret_cast<T*>(policy->get_value(&object));
+        return *r;
+    }
+
+    /// Cast operator. You can only cast to the original type.
+    template<typename T>
+    const T& cast() const
+    {
+        if (policy->type() != typeid(T)) throw anyimpl::bad_any_cast();
+        void* obj = const_cast<void*>(object);
+        T* r = reinterpret_cast<T*>(policy->get_value(&obj));
+        return *r;
+    }
+
+    /// Returns true if the any contains no value.
+    bool empty() const
+    {
+        return policy->type() == typeid(anyimpl::empty_any);
+    }
+
+    /// Frees any allocated memory, and sets the value to NULL.
+    void reset()
+    {
+        policy->static_delete(&object);
+        policy = anyimpl::get_policy<anyimpl::empty_any>();
+    }
+
+    /// Returns true if the two types are the same.
+    bool compatible(const any& x) const
+    {
+        return policy->type() == x.policy->type();
+    }
+
+    /// Returns if the type is compatible with the policy
+    template<typename T>
+    bool has_type()
+    {
+        return policy->type() == typeid(T);
+    }
+
+    const std::type_info& type() const
+    {
+        return policy->type();
+    }
+
+    friend std::ostream& operator <<(std::ostream& out, const any& any_val);
+};
+
+inline std::ostream& operator <<(std::ostream& out, const any& any_val)
+{
+    any_val.policy->print(out,&any_val.object);
+    return out;
+}
+
+}
+
+#endif // OPENCV_FLANN_ANY_H_

modules/flann/include/opencv2/flann/autotuned_index.h

@@ -27,216 +27,204 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
+#ifndef OPENCV_FLANN_AUTOTUNED_INDEX_H_
+#define OPENCV_FLANN_AUTOTUNED_INDEX_H_
 
-#ifndef _OPENCV_AUTOTUNEDINDEX_H_
+#include "general.h"
-#define _OPENCV_AUTOTUNEDINDEX_H_
+#include "nn_index.h"
-
+#include "ground_truth.h"
-#include "opencv2/flann/general.h"
+#include "index_testing.h"
-#include "opencv2/flann/nn_index.h"
+#include "sampling.h"
-#include "opencv2/flann/ground_truth.h"
+#include "kdtree_index.h"
-#include "opencv2/flann/index_testing.h"
+#include "kdtree_single_index.h"
-#include "opencv2/flann/sampling.h"
+#include "kmeans_index.h"
-#include "opencv2/flann/all_indices.h"
+#include "composite_index.h"
+#include "linear_index.h"
+#include "logger.h"
 
 namespace cvflann
 {
 
-struct AutotunedIndexParams : public IndexParams {
+template<typename Distance>
-	AutotunedIndexParams( float target_precision_ = 0.8, float build_weight_ = 0.01,
+NNIndex<Distance>* create_index_by_type(const Matrix<typename Distance::ElementType>& dataset, const IndexParams& params, const Distance& distance);
-			float memory_weight_ = 0, float sample_fraction_ = 0.1) :
-		IndexParams(FLANN_INDEX_AUTOTUNED),
-		target_precision(target_precision_),
-		build_weight(build_weight_),
-		memory_weight(memory_weight_),
-		sample_fraction(sample_fraction_) {};
 
-	float target_precision;    // precision desired (used for autotuning, -1 otherwise)
-	float build_weight;        // build tree time weighting factor
-	float memory_weight;       // index memory weighting factor
-    float sample_fraction;     // what fraction of the dataset to use for autotuning
 
-	void print() const
+struct AutotunedIndexParams : public IndexParams
-	{
+{
-		logger().info("Index type: %d\n",(int)algorithm);
+    AutotunedIndexParams(float target_precision = 0.8, float build_weight = 0.01, float memory_weight = 0, float sample_fraction = 0.1)
-		logger().info("logger(). precision: %g\n", target_precision);
+    {
-		logger().info("Build weight: %g\n", build_weight);
+        (*this)["algorithm"] = FLANN_INDEX_AUTOTUNED;
-		logger().info("Memory weight: %g\n", memory_weight);
+        // precision desired (used for autotuning, -1 otherwise)
-		logger().info("Sample fraction: %g\n", sample_fraction);
+        (*this)["target_precision"] = target_precision;
-	}
+        // build tree time weighting factor
+        (*this)["build_weight"] = build_weight;
+        // index memory weighting factor
+        (*this)["memory_weight"] = memory_weight;
+        // what fraction of the dataset to use for autotuning
+        (*this)["sample_fraction"] = sample_fraction;
+    }
 };
 
 
-template <typename ELEM_TYPE, typename DIST_TYPE = typename DistType<ELEM_TYPE>::type >
+template <typename Distance>
-class AutotunedIndex : public NNIndex<ELEM_TYPE>
+class AutotunedIndex : public NNIndex<Distance>
 {
-	NNIndex<ELEM_TYPE>* bestIndex;
-
-	IndexParams* bestParams;
-	SearchParams bestSearchParams;
-
-    Matrix<ELEM_TYPE> sampledDataset;
-    Matrix<ELEM_TYPE> testDataset;
-    Matrix<int> gt_matches;
-
-    float speedup;
-
-	/**
-	 * The dataset used by this index
-	 */
-    const Matrix<ELEM_TYPE> dataset;
-
-    /**
-     * Index parameters
-     */
-    const AutotunedIndexParams& index_params;
-
-	AutotunedIndex& operator=(const AutotunedIndex&);
-	AutotunedIndex(const AutotunedIndex&);
-
 public:
+    typedef typename Distance::ElementType ElementType;
+    typedef typename Distance::ResultType DistanceType;
 
-    AutotunedIndex(const Matrix<ELEM_TYPE>& inputData, const AutotunedIndexParams& params = AutotunedIndexParams() ) :
+    AutotunedIndex(const Matrix<ElementType>& inputData, const IndexParams& params = AutotunedIndexParams(), Distance d = Distance()) :
-    	dataset(inputData), index_params(params)
+        dataset_(inputData), distance_(d)
-	{
+    {
-        bestIndex = NULL;
+        target_precision_ = get_param(params, "target_precision",0.8f);
-        bestParams = NULL;
+        build_weight_ =  get_param(params,"build_weight", 0.01f);
-	}
+        memory_weight_ = get_param(params, "memory_weight", 0.0f);
+        sample_fraction_ = get_param(params,"sample_fraction", 0.1f);
+        bestIndex_ = NULL;
+    }
+
+    AutotunedIndex(const AutotunedIndex&);
+    AutotunedIndex& operator=(const AutotunedIndex&);
 
     virtual ~AutotunedIndex()
     {
-    	if (bestIndex!=NULL) {
+        if (bestIndex_ != NULL) {
-    		delete bestIndex;
+            delete bestIndex_;
-    	}
+            bestIndex_ = NULL;
-    	if (bestParams!=NULL) {
+        }
-    		delete bestParams;
+    }
-    	}
-    };
 
     /**
-		Method responsible with building the index.
+     *          Method responsible with building the index.
-	*/
+     */
-	virtual void buildIndex()
+    virtual void buildIndex()
-	{
+    {
-		bestParams = estimateBuildParams();
+        bestParams_ = estimateBuildParams();
-		logger().info("----------------------------------------------------\n");
+        Logger::info("----------------------------------------------------\n");
-		logger().info("Autotuned parameters:\n");
+        Logger::info("Autotuned parameters:\n");
-		bestParams->print();
+        print_params(bestParams_);
-		logger().info("----------------------------------------------------\n");
+        Logger::info("----------------------------------------------------\n");
-    	flann_algorithm_t index_type = bestParams->getIndexType();
+
-    	switch (index_type) {
+        bestIndex_ = create_index_by_type(dataset_, bestParams_, distance_);
-    	case FLANN_INDEX_LINEAR:
+        bestIndex_->buildIndex();
-    		bestIndex = new LinearIndex<ELEM_TYPE>(dataset, (const LinearIndexParams&)*bestParams);
+        speedup_ = estimateSearchParams(bestSearchParams_);
-    		break;
+        Logger::info("----------------------------------------------------\n");
-    	case FLANN_INDEX_KDTREE:
+        Logger::info("Search parameters:\n");
-    		bestIndex = new KDTreeIndex<ELEM_TYPE>(dataset, (const KDTreeIndexParams&)*bestParams);
+        print_params(bestSearchParams_);
-    		break;
+        Logger::info("----------------------------------------------------\n");
-    	case FLANN_INDEX_KMEANS:
+    }
-    		bestIndex = new KMeansIndex<ELEM_TYPE>(dataset, (const KMeansIndexParams&)*bestParams);
-    		break;
-    	default:
-    		throw FLANNException("Unknown algorithm choosen by the autotuning, most likely a bug.");
-    	}
-		bestIndex->buildIndex();
-		speedup = estimateSearchParams(bestSearchParams);
-	}
 
     /**
-        Saves the index to a stream
+     *  Saves the index to a stream
-    */
+     */
     virtual void saveIndex(FILE* stream)
     {
-    	save_value(stream, (int)bestIndex->getType());
+        save_value(stream, (int)bestIndex_->getType());
-    	bestIndex->saveIndex(stream);
+        bestIndex_->saveIndex(stream);
-    	save_value(stream, bestSearchParams);
+        save_value(stream, get_param<int>(bestSearchParams_, "checks"));
     }
 
     /**
-        Loads the index from a stream
+     *  Loads the index from a stream
-    */
+     */
     virtual void loadIndex(FILE* stream)
     {
-    	int index_type;
+        int index_type;
-    	load_value(stream,index_type);
+
-    	IndexParams* params = ParamsFactory_instance().create((flann_algorithm_t)index_type);
+        load_value(stream, index_type);
-    	bestIndex = create_index_by_type(dataset, *params);
+        IndexParams params;
-    	bestIndex->loadIndex(stream);
+        params["algorithm"] = (flann_algorithm_t)index_type;
-    	load_value(stream, bestSearchParams);
+        bestIndex_ = create_index_by_type<Distance>(dataset_, params, distance_);
+        bestIndex_->loadIndex(stream);
+        int checks;
+        load_value(stream, checks);
+        bestSearchParams_["checks"] = checks;
     }
 
-	/**
+    /**
-		Method that searches for nearest-neighbors
+     *      Method that searches for nearest-neighbors
-	*/
+     */
-	virtual void findNeighbors(ResultSet<ELEM_TYPE>& result, const ELEM_TYPE* vec, const SearchParams& searchParams)
+    virtual void findNeighbors(ResultSet<DistanceType>& result, const ElementType* vec, const SearchParams& searchParams)
-	{
+    {
-		if (searchParams.checks==-2) {
+        int checks = get_param<int>(searchParams,"checks",FLANN_CHECKS_AUTOTUNED);
-			bestIndex->findNeighbors(result, vec, bestSearchParams);
+        if (checks == FLANN_CHECKS_AUTOTUNED) {
-		}
+            bestIndex_->findNeighbors(result, vec, bestSearchParams_);
-		else {
+        }
-			bestIndex->findNeighbors(result, vec, searchParams);
+        else {
-		}
+            bestIndex_->findNeighbors(result, vec, searchParams);
-	}
+        }
+    }
 
 
-	const IndexParams* getParameters() const
+    IndexParams getParameters() const
-	{
+    {
-		return bestIndex->getParameters();
+        return bestIndex_->getParameters();
-	}
+    }
 
+    SearchParams getSearchParameters() const
+    {
+        return bestSearchParams_;
+    }
 
-	/**
+    float getSpeedup() const
-		Number of features in this index.
+    {
-	*/
+        return speedup_;
-	virtual size_t size() const
+    }
-	{
-		return bestIndex->size();
-	}
 
-	/**
-		The length of each vector in this index.
-	*/
-	virtual size_t veclen() const
-	{
-		return bestIndex->veclen();
-	}
-
-	/**
-	 The amount of memory (in bytes) this index uses.
-	*/
- 	virtual int usedMemory() const
- 	{
- 		return bestIndex->usedMemory();
- 	}
 
     /**
-    * Algorithm name
+     *      Number of features in this index.
-    */
+     */
+    virtual size_t size() const
+    {
+        return bestIndex_->size();
+    }
+
+    /**
+     *  The length of each vector in this index.
+     */
+    virtual size_t veclen() const
+    {
+        return bestIndex_->veclen();
+    }
+
+    /**
+     * The amount of memory (in bytes) this index uses.
+     */
+    virtual int usedMemory() const
+    {
+        return bestIndex_->usedMemory();
+    }
+
+    /**
+     * Algorithm name
+     */
     virtual flann_algorithm_t getType() const
     {
-    	return FLANN_INDEX_AUTOTUNED;
+        return FLANN_INDEX_AUTOTUNED;
     }
 
 private:
 
-    struct CostData {
+    struct CostData
+    {
         float searchTimeCost;
         float buildTimeCost;
-        float timeCost;
         float memoryCost;
         float totalCost;
+        IndexParams params;
     };
 
-    typedef std::pair<CostData, KDTreeIndexParams> KDTreeCostData;
+    void evaluate_kmeans(CostData& cost)
-    typedef std::pair<CostData, KMeansIndexParams> KMeansCostData;
-
-
-    void evaluate_kmeans(CostData& cost, const KMeansIndexParams& kmeans_params)
     {
         StartStopTimer t;
         int checks;
         const int nn = 1;
 
-        logger().info("KMeansTree using params: max_iterations=%d, branching=%d\n", kmeans_params.iterations, kmeans_params.branching);
+        Logger::info("KMeansTree using params: max_iterations=%d, branching=%d\n",
-        KMeansIndex<ELEM_TYPE> kmeans(sampledDataset, kmeans_params);
+                     get_param<int>(cost.params,"iterations"),
+                     get_param<int>(cost.params,"branching"));
+        KMeansIndex<Distance> kmeans(sampledDataset_, cost.params, distance_);
         // measure index build time
         t.start();
         kmeans.buildIndex();
@@ -244,25 +232,24 @@ private:
         float buildTime = (float)t.value;
 
         // measure search time
-        float searchTime = test_index_precision(kmeans, sampledDataset, testDataset, gt_matches, index_params.target_precision, checks, nn);;
+        float searchTime = test_index_precision(kmeans, sampledDataset_, testDataset_, gt_matches_, target_precision_, checks, distance_, nn);
 
-        float datasetMemory = (float)(sampledDataset.rows*sampledDataset.cols*sizeof(float));
+        float datasetMemory = float(sampledDataset_.rows * sampledDataset_.cols * sizeof(float));
-        cost.memoryCost = (kmeans.usedMemory()+datasetMemory)/datasetMemory;
+        cost.memoryCost = (kmeans.usedMemory() + datasetMemory) / datasetMemory;
         cost.searchTimeCost = searchTime;
         cost.buildTimeCost = buildTime;
-        cost.timeCost = (buildTime*index_params.build_weight+searchTime);
+        Logger::info("KMeansTree buildTime=%g, searchTime=%g, build_weight=%g\n", buildTime, searchTime, build_weight_);
-        logger().info("KMeansTree buildTime=%g, searchTime=%g, timeCost=%g, buildTimeFactor=%g\n",buildTime, searchTime, cost.timeCost, index_params.build_weight);
     }
 
 
-     void evaluate_kdtree(CostData& cost, const KDTreeIndexParams& kdtree_params)
+    void evaluate_kdtree(CostData& cost)
     {
         StartStopTimer t;
         int checks;
         const int nn = 1;
 
-        logger().info("KDTree using params: trees=%d\n",kdtree_params.trees);
+        Logger::info("KDTree using params: trees=%d\n", get_param<int>(cost.params,"trees"));
-        KDTreeIndex<ELEM_TYPE> kdtree(sampledDataset, kdtree_params);
+        KDTreeIndex<Distance> kdtree(sampledDataset_, cost.params, distance_);
 
         t.start();
         kdtree.buildIndex();
@@ -270,267 +257,220 @@ private:
         float buildTime = (float)t.value;
 
         //measure search time
-        float searchTime = test_index_precision(kdtree, sampledDataset, testDataset, gt_matches, index_params.target_precision, checks, nn);
+        float searchTime = test_index_precision(kdtree, sampledDataset_, testDataset_, gt_matches_, target_precision_, checks, distance_, nn);
 
-        float datasetMemory = (float)(sampledDataset.rows*sampledDataset.cols*sizeof(float));
+        float datasetMemory = float(sampledDataset_.rows * sampledDataset_.cols * sizeof(float));
-        cost.memoryCost = (kdtree.usedMemory()+datasetMemory)/datasetMemory;
+        cost.memoryCost = (kdtree.usedMemory() + datasetMemory) / datasetMemory;
         cost.searchTimeCost = searchTime;
         cost.buildTimeCost = buildTime;
-        cost.timeCost = (buildTime*index_params.build_weight+searchTime);
+        Logger::info("KDTree buildTime=%g, searchTime=%g\n", buildTime, searchTime);
-        logger().info("KDTree buildTime=%g, searchTime=%g, timeCost=%g\n",buildTime, searchTime, cost.timeCost);
     }
 
 
-//    struct KMeansSimpleDownhillFunctor {
+    //    struct KMeansSimpleDownhillFunctor {
-//
+    //
-//        Autotune& autotuner;
+    //        Autotune& autotuner;
-//        KMeansSimpleDownhillFunctor(Autotune& autotuner_) : autotuner(autotuner_) {};
+    //        KMeansSimpleDownhillFunctor(Autotune& autotuner_) : autotuner(autotuner_) {};
-//
+    //
-//        float operator()(int* params) {
+    //        float operator()(int* params) {
-//
+    //
-//            float maxFloat = numeric_limits<float>::max();
+    //            float maxFloat = numeric_limits<float>::max();
-//
+    //
-//            if (params[0]<2) return maxFloat;
+    //            if (params[0]<2) return maxFloat;
-//            if (params[1]<0) return maxFloat;
+    //            if (params[1]<0) return maxFloat;
-//
+    //
-//            CostData c;
+    //            CostData c;
-//            c.params["algorithm"] = KMEANS;
+    //            c.params["algorithm"] = KMEANS;
-//            c.params["centers-init"] = CENTERS_RANDOM;
+    //            c.params["centers-init"] = CENTERS_RANDOM;
-//            c.params["branching"] = params[0];
+    //            c.params["branching"] = params[0];
-//            c.params["max-iterations"] = params[1];
+    //            c.params["max-iterations"] = params[1];
-//
+    //
-//            autotuner.evaluate_kmeans(c);
+    //            autotuner.evaluate_kmeans(c);
-//
+    //
-//            return c.timeCost;
+    //            return c.timeCost;
-//
+    //
-//        }
+    //        }
-//    };
+    //    };
-//
+    //
-//    struct KDTreeSimpleDownhillFunctor {
+    //    struct KDTreeSimpleDownhillFunctor {
-//
+    //
-//        Autotune& autotuner;
+    //        Autotune& autotuner;
-//        KDTreeSimpleDownhillFunctor(Autotune& autotuner_) : autotuner(autotuner_) {};
+    //        KDTreeSimpleDownhillFunctor(Autotune& autotuner_) : autotuner(autotuner_) {};
-//
+    //
-//        float operator()(int* params) {
+    //        float operator()(int* params) {
-//            float maxFloat = numeric_limits<float>::max();
+    //            float maxFloat = numeric_limits<float>::max();
-//
+    //
-//            if (params[0]<1) return maxFloat;
+    //            if (params[0]<1) return maxFloat;
-//
+    //
-//            CostData c;
+    //            CostData c;
-//            c.params["algorithm"] = KDTREE;
+    //            c.params["algorithm"] = KDTREE;
-//            c.params["trees"] = params[0];
+    //            c.params["trees"] = params[0];
-//
+    //
-//            autotuner.evaluate_kdtree(c);
+    //            autotuner.evaluate_kdtree(c);
-//
+    //
-//            return c.timeCost;
+    //            return c.timeCost;
-//
+    //
-//        }
+    //        }
-//    };
+    //    };
 
 
 
-    KMeansCostData optimizeKMeans()
+    void optimizeKMeans(std::vector<CostData>& costs)
     {
-        logger().info("KMEANS, Step 1: Exploring parameter space\n");
+        Logger::info("KMEANS, Step 1: Exploring parameter space\n");
 
         // explore kmeans parameters space using combinations of the parameters below
         int maxIterations[] = { 1, 5, 10, 15 };
         int branchingFactors[] = { 16, 32, 64, 128, 256 };
 
-        int kmeansParamSpaceSize = ARRAY_LEN(maxIterations)*ARRAY_LEN(branchingFactors);
+        int kmeansParamSpaceSize = FLANN_ARRAY_LEN(maxIterations) * FLANN_ARRAY_LEN(branchingFactors);
-
+        costs.reserve(costs.size() + kmeansParamSpaceSize);
-        std::vector<KMeansCostData> kmeansCosts(kmeansParamSpaceSize);
-
-//        CostData* kmeansCosts = new CostData[kmeansParamSpaceSize];
 
         // evaluate kmeans for all parameter combinations
-        int cnt = 0;
+        for (size_t i = 0; i < FLANN_ARRAY_LEN(maxIterations); ++i) {
-        for (size_t i=0; i<ARRAY_LEN(maxIterations); ++i) {
+            for (size_t j = 0; j < FLANN_ARRAY_LEN(branchingFactors); ++j) {
-            for (size_t j=0; j<ARRAY_LEN(branchingFactors); ++j) {
+                CostData cost;
+                cost.params["algorithm"] = FLANN_INDEX_KMEANS;
+                cost.params["centers_init"] = FLANN_CENTERS_RANDOM;
+                cost.params["iterations"] = maxIterations[i];
+                cost.params["branching"] = branchingFactors[j];
 
-            	kmeansCosts[cnt].second.centers_init = FLANN_CENTERS_RANDOM;
+                evaluate_kmeans(cost);
-            	kmeansCosts[cnt].second.iterations = maxIterations[i];
+                costs.push_back(cost);
-            	kmeansCosts[cnt].second.branching = branchingFactors[j];
-
-                evaluate_kmeans(kmeansCosts[cnt].first, kmeansCosts[cnt].second);
-
-                int k = cnt;
-                // order by time cost
-                while (k>0 && kmeansCosts[k].first.timeCost < kmeansCosts[k-1].first.timeCost) {
-                    swap(kmeansCosts[k],kmeansCosts[k-1]);
-                    --k;
-                }
-                ++cnt;
             }
         }
 
-//         logger().info("KMEANS, Step 2: simplex-downhill optimization\n");
+        //         Logger::info("KMEANS, Step 2: simplex-downhill optimization\n");
-//
+        //
-//         const int n = 2;
+        //         const int n = 2;
-//         // choose initial simplex points as the best parameters so far
+        //         // choose initial simplex points as the best parameters so far
-//         int kmeansNMPoints[n*(n+1)];
+        //         int kmeansNMPoints[n*(n+1)];
-//         float kmeansVals[n+1];
+        //         float kmeansVals[n+1];
-//         for (int i=0;i<n+1;++i) {
+        //         for (int i=0;i<n+1;++i) {
-//             kmeansNMPoints[i*n] = (int)kmeansCosts[i].params["branching"];
+        //             kmeansNMPoints[i*n] = (int)kmeansCosts[i].params["branching"];
-//             kmeansNMPoints[i*n+1] = (int)kmeansCosts[i].params["max-iterations"];
+        //             kmeansNMPoints[i*n+1] = (int)kmeansCosts[i].params["max-iterations"];
-//             kmeansVals[i] = kmeansCosts[i].timeCost;
+        //             kmeansVals[i] = kmeansCosts[i].timeCost;
-//         }
+        //         }
-//         KMeansSimpleDownhillFunctor kmeans_cost_func(*this);
+        //         KMeansSimpleDownhillFunctor kmeans_cost_func(*this);
-//         // run optimization
+        //         // run optimization
-//         optimizeSimplexDownhill(kmeansNMPoints,n,kmeans_cost_func,kmeansVals);
+        //         optimizeSimplexDownhill(kmeansNMPoints,n,kmeans_cost_func,kmeansVals);
-//         // store results
+        //         // store results
-//         for (int i=0;i<n+1;++i) {
+        //         for (int i=0;i<n+1;++i) {
-//             kmeansCosts[i].params["branching"] = kmeansNMPoints[i*2];
+        //             kmeansCosts[i].params["branching"] = kmeansNMPoints[i*2];
-//             kmeansCosts[i].params["max-iterations"] = kmeansNMPoints[i*2+1];
+        //             kmeansCosts[i].params["max-iterations"] = kmeansNMPoints[i*2+1];
-//             kmeansCosts[i].timeCost = kmeansVals[i];
+        //             kmeansCosts[i].timeCost = kmeansVals[i];
-//         }
+        //         }
-
-        float optTimeCost = kmeansCosts[0].first.timeCost;
-        // recompute total costs factoring in the memory costs
-        for (int i=0;i<kmeansParamSpaceSize;++i) {
-            kmeansCosts[i].first.totalCost = (kmeansCosts[i].first.timeCost/optTimeCost + index_params.memory_weight * kmeansCosts[i].first.memoryCost);
-
-            int k = i;
-            while (k>0 && kmeansCosts[k].first.totalCost < kmeansCosts[k-1].first.totalCost) {
-                swap(kmeansCosts[k],kmeansCosts[k-1]);
-                k--;
-            }
-        }
-        // display the costs obtained
-        for (int i=0;i<kmeansParamSpaceSize;++i) {
-            logger().info("KMeans, branching=%d, iterations=%d, time_cost=%g[%g] (build=%g, search=%g), memory_cost=%g, cost=%g\n",
-                kmeansCosts[i].second.branching, kmeansCosts[i].second.iterations,
-            kmeansCosts[i].first.timeCost,kmeansCosts[i].first.timeCost/optTimeCost,
-            kmeansCosts[i].first.buildTimeCost, kmeansCosts[i].first.searchTimeCost,
-            kmeansCosts[i].first.memoryCost,kmeansCosts[i].first.totalCost);
-        }
-
-        return kmeansCosts[0];
     }
 
 
-    KDTreeCostData optimizeKDTree()
+    void optimizeKDTree(std::vector<CostData>& costs)
     {
-
+        Logger::info("KD-TREE, Step 1: Exploring parameter space\n");
-        logger().info("KD-TREE, Step 1: Exploring parameter space\n");
 
         // explore kd-tree parameters space using the parameters below
         int testTrees[] = { 1, 4, 8, 16, 32 };
 
-        size_t kdtreeParamSpaceSize = ARRAY_LEN(testTrees);
-        std::vector<KDTreeCostData> kdtreeCosts(kdtreeParamSpaceSize);
-
         // evaluate kdtree for all parameter combinations
-        int cnt = 0;
+        for (size_t i = 0; i < FLANN_ARRAY_LEN(testTrees); ++i) {
-        for (size_t i=0; i<ARRAY_LEN(testTrees); ++i) {
+            CostData cost;
-        	kdtreeCosts[cnt].second.trees = testTrees[i];
+            cost.params["trees"] = testTrees[i];
 
-            evaluate_kdtree(kdtreeCosts[cnt].first, kdtreeCosts[cnt].second);
+            evaluate_kdtree(cost);
-
+            costs.push_back(cost);
-            int k = cnt;
-            // order by time cost
-            while (k>0 && kdtreeCosts[k].first.timeCost < kdtreeCosts[k-1].first.timeCost) {
-                swap(kdtreeCosts[k],kdtreeCosts[k-1]);
-                --k;
-            }
-            ++cnt;
         }
 
-//         logger().info("KD-TREE, Step 2: simplex-downhill optimization\n");
+        //         Logger::info("KD-TREE, Step 2: simplex-downhill optimization\n");
-//
+        //
-//         const int n = 1;
+        //         const int n = 1;
-//         // choose initial simplex points as the best parameters so far
+        //         // choose initial simplex points as the best parameters so far
-//         int kdtreeNMPoints[n*(n+1)];
+        //         int kdtreeNMPoints[n*(n+1)];
-//         float kdtreeVals[n+1];
+        //         float kdtreeVals[n+1];
-//         for (int i=0;i<n+1;++i) {
+        //         for (int i=0;i<n+1;++i) {
-//             kdtreeNMPoints[i] = (int)kdtreeCosts[i].params["trees"];
+        //             kdtreeNMPoints[i] = (int)kdtreeCosts[i].params["trees"];
-//             kdtreeVals[i] = kdtreeCosts[i].timeCost;
+        //             kdtreeVals[i] = kdtreeCosts[i].timeCost;
-//         }
+        //         }
-//         KDTreeSimpleDownhillFunctor kdtree_cost_func(*this);
+        //         KDTreeSimpleDownhillFunctor kdtree_cost_func(*this);
-//         // run optimization
+        //         // run optimization
-//         optimizeSimplexDownhill(kdtreeNMPoints,n,kdtree_cost_func,kdtreeVals);
+        //         optimizeSimplexDownhill(kdtreeNMPoints,n,kdtree_cost_func,kdtreeVals);
-//         // store results
+        //         // store results
-//         for (int i=0;i<n+1;++i) {
+        //         for (int i=0;i<n+1;++i) {
-//             kdtreeCosts[i].params["trees"] = kdtreeNMPoints[i];
+        //             kdtreeCosts[i].params["trees"] = kdtreeNMPoints[i];
-//             kdtreeCosts[i].timeCost = kdtreeVals[i];
+        //             kdtreeCosts[i].timeCost = kdtreeVals[i];
-//         }
+        //         }
-
-        float optTimeCost = kdtreeCosts[0].first.timeCost;
-        // recompute costs for kd-tree factoring in memory cost
-        for (size_t i=0;i<kdtreeParamSpaceSize;++i) {
-            kdtreeCosts[i].first.totalCost = (kdtreeCosts[i].first.timeCost/optTimeCost + index_params.memory_weight * kdtreeCosts[i].first.memoryCost);
-
-            int k = (int)i;
-            while (k>0 && kdtreeCosts[k].first.totalCost < kdtreeCosts[k-1].first.totalCost) {
-                swap(kdtreeCosts[k],kdtreeCosts[k-1]);
-                k--;
-            }
-        }
-        // display costs obtained
-        for (size_t i=0;i<kdtreeParamSpaceSize;++i) {
-            logger().info("kd-tree, trees=%d, time_cost=%g[%g] (build=%g, search=%g), memory_cost=%g, cost=%g\n",
-            kdtreeCosts[i].second.trees,kdtreeCosts[i].first.timeCost,kdtreeCosts[i].first.timeCost/optTimeCost,
-            kdtreeCosts[i].first.buildTimeCost, kdtreeCosts[i].first.searchTimeCost,
-            kdtreeCosts[i].first.memoryCost,kdtreeCosts[i].first.totalCost);
-        }
-
-        return kdtreeCosts[0];
     }
 
     /**
-        Chooses the best nearest-neighbor algorithm and estimates the optimal
+     *  Chooses the best nearest-neighbor algorithm and estimates the optimal
-        parameters to use when building the index (for a given precision).
+     *  parameters to use when building the index (for a given precision).
-        Returns a dictionary with the optimal parameters.
+     *  Returns a dictionary with the optimal parameters.
-    */
+     */
-    IndexParams* estimateBuildParams()
+    IndexParams estimateBuildParams()
     {
-        int sampleSize = int(index_params.sample_fraction*dataset.rows);
+        std::vector<CostData> costs;
-        int testSampleSize = std::min(sampleSize/10, 1000);
 
-        logger().info("Entering autotuning, dataset size: %d, sampleSize: %d, testSampleSize: %d\n",dataset.rows, sampleSize, testSampleSize);
+        int sampleSize = int(sample_fraction_ * dataset_.rows);
+        int testSampleSize = std::min(sampleSize / 10, 1000);
+
+        Logger::info("Entering autotuning, dataset size: %d, sampleSize: %d, testSampleSize: %d, target precision: %g\n", dataset_.rows, sampleSize, testSampleSize, target_precision_);
 
         // For a very small dataset, it makes no sense to build any fancy index, just
         // use linear search
-        if (testSampleSize<10) {
+        if (testSampleSize < 10) {
-            logger().info("Choosing linear, dataset too small\n");
+            Logger::info("Choosing linear, dataset too small\n");
-            return new LinearIndexParams();
+            return LinearIndexParams();
         }
 
         // We use a fraction of the original dataset to speedup the autotune algorithm
-        sampledDataset = random_sample(dataset,sampleSize);
+        sampledDataset_ = random_sample(dataset_, sampleSize);
         // We use a cross-validation approach, first we sample a testset from the dataset
-        testDataset = random_sample(sampledDataset,testSampleSize,true);
+        testDataset_ = random_sample(sampledDataset_, testSampleSize, true);
 
         // We compute the ground truth using linear search
-        logger().info("Computing ground truth... \n");
+        Logger::info("Computing ground truth... \n");
-        gt_matches = Matrix<int>(new int[testDataset.rows],(long)testDataset.rows, 1);
+        gt_matches_ = Matrix<int>(new int[testDataset_.rows], testDataset_.rows, 1);
         StartStopTimer t;
         t.start();
-        compute_ground_truth(sampledDataset, testDataset, gt_matches, 0);
+        compute_ground_truth<Distance>(sampledDataset_, testDataset_, gt_matches_, 0, distance_);
         t.stop();
-        float bestCost = (float)t.value;
+
-        IndexParams* bestParams = new LinearIndexParams();
+        CostData linear_cost;
+        linear_cost.searchTimeCost = (float)t.value;
+        linear_cost.buildTimeCost = 0;
+        linear_cost.memoryCost = 0;
+        linear_cost.params["algorithm"] = FLANN_INDEX_LINEAR;
+
+        costs.push_back(linear_cost);
 
         // Start parameter autotune process
-        logger().info("Autotuning parameters...\n");
+        Logger::info("Autotuning parameters...\n");
 
+        optimizeKMeans(costs);
+        optimizeKDTree(costs);
 
-        KMeansCostData kmeansCost = optimizeKMeans();
+        float bestTimeCost = costs[0].searchTimeCost;
-        if (kmeansCost.first.totalCost<bestCost) {
+        for (size_t i = 0; i < costs.size(); ++i) {
-            bestParams = new KMeansIndexParams(kmeansCost.second);
+            float timeCost = costs[i].buildTimeCost * build_weight_ + costs[i].searchTimeCost;
-            bestCost = kmeansCost.first.totalCost;
+            if (timeCost < bestTimeCost) {
+                bestTimeCost = timeCost;
+            }
         }
 
-        KDTreeCostData kdtreeCost = optimizeKDTree();
+        float bestCost = costs[0].searchTimeCost / bestTimeCost;
-
+        IndexParams bestParams = costs[0].params;
-        if (kdtreeCost.first.totalCost<bestCost) {
+        if (bestTimeCost > 0) {
-            bestParams = new KDTreeIndexParams(kdtreeCost.second);
+            for (size_t i = 0; i < costs.size(); ++i) {
-            bestCost = kdtreeCost.first.totalCost;
+                float crtCost = (costs[i].buildTimeCost * build_weight_ + costs[i].searchTimeCost) / bestTimeCost +
+                                memory_weight_ * costs[i].memoryCost;
+                if (crtCost < bestCost) {
+                    bestCost = crtCost;
+                    bestParams = costs[i].params;
+                }
+            }
         }
 
-        gt_matches.release();
+        delete[] gt_matches_.data;
-        sampledDataset.release();
+        delete[] testDataset_.data;
-        testDataset.release();
+        delete[] sampledDataset_.data;
 
         return bestParams;
     }
@@ -538,48 +478,48 @@ private:
 
 
     /**
-        Estimates the search time parameters needed to get the desired precision.
+     *  Estimates the search time parameters needed to get the desired precision.
-        Precondition: the index is built
+     *  Precondition: the index is built
-        Postcondition: the searchParams will have the optimum params set, also the speedup obtained over linear search.
+     *  Postcondition: the searchParams will have the optimum params set, also the speedup obtained over linear search.
-    */
+     */
     float estimateSearchParams(SearchParams& searchParams)
     {
         const int nn = 1;
         const size_t SAMPLE_COUNT = 1000;
 
-        assert(bestIndex!=NULL);   // must have a valid index
+        assert(bestIndex_ != NULL); // must have a valid index
 
         float speedup = 0;
 
-        int samples = (int)std::min(dataset.rows/10, SAMPLE_COUNT);
+        int samples = (int)std::min(dataset_.rows / 10, SAMPLE_COUNT);
-        if (samples>0) {
+        if (samples > 0) {
-            Matrix<ELEM_TYPE> testDataset = random_sample(dataset,samples);
+            Matrix<ElementType> testDataset = random_sample(dataset_, samples);
 
-            logger().info("Computing ground truth\n");
+            Logger::info("Computing ground truth\n");
 
             // we need to compute the ground truth first
-            Matrix<int> gt_matches(new int[testDataset.rows],(long)testDataset.rows,1);
+            Matrix<int> gt_matches(new int[testDataset.rows], testDataset.rows, 1);
             StartStopTimer t;
             t.start();
-            compute_ground_truth(dataset, testDataset, gt_matches,1);
+            compute_ground_truth<Distance>(dataset_, testDataset, gt_matches, 1, distance_);
             t.stop();
             float linear = (float)t.value;
 
             int checks;
-            logger().info("Estimating number of checks\n");
+            Logger::info("Estimating number of checks\n");
 
             float searchTime;
             float cb_index;
-            if (bestIndex->getType() == FLANN_INDEX_KMEANS) {
+            if (bestIndex_->getType() == FLANN_INDEX_KMEANS) {
-                logger().info("KMeans algorithm, estimating cluster border factor\n");
+                Logger::info("KMeans algorithm, estimating cluster border factor\n");
-                KMeansIndex<ELEM_TYPE>* kmeans = (KMeansIndex<ELEM_TYPE>*)bestIndex;
+                KMeansIndex<Distance>* kmeans = (KMeansIndex<Distance>*)bestIndex_;
                 float bestSearchTime = -1;
                 float best_cb_index = -1;
                 int best_checks = -1;
-                for (cb_index = 0;cb_index<1.1f; cb_index+=0.2f) {
+                for (cb_index = 0; cb_index < 1.1f; cb_index += 0.2f) {
                     kmeans->set_cb_index(cb_index);
-                    searchTime = test_index_precision(*kmeans, dataset, testDataset, gt_matches, index_params.target_precision, checks, nn, 1);
+                    searchTime = test_index_precision(*kmeans, dataset_, testDataset, gt_matches, target_precision_, checks, distance_, nn, 1);
-                    if (searchTime<bestSearchTime || bestSearchTime == -1) {
+                    if ((searchTime < bestSearchTime) || (bestSearchTime == -1)) {
                         bestSearchTime = searchTime;
                         best_cb_index = cb_index;
                         best_checks = checks;
@@ -590,26 +530,54 @@ private:
                 checks = best_checks;
 
                 kmeans->set_cb_index(best_cb_index);
-                logger().info("Optimum cb_index: %g\n",cb_index);
+                Logger::info("Optimum cb_index: %g\n", cb_index);
-                ((KMeansIndexParams*)bestParams)->cb_index = cb_index;
+                bestParams_["cb_index"] = cb_index;
             }
             else {
-                searchTime = test_index_precision(*bestIndex, dataset, testDataset, gt_matches, index_params.target_precision, checks, nn, 1);
+                searchTime = test_index_precision(*bestIndex_, dataset_, testDataset, gt_matches, target_precision_, checks, distance_, nn, 1);
             }
 
-            logger().info("Required number of checks: %d \n",checks);;
+            Logger::info("Required number of checks: %d \n", checks);
-            searchParams.checks = checks;
+            searchParams["checks"] = checks;
 
-            speedup = linear/searchTime;
+            speedup = linear / searchTime;
 
-            gt_matches.release();
+            delete[] gt_matches.data;
+            delete[] testDataset.data;
         }
 
         return speedup;
     }
 
+private:
+    NNIndex<Distance>* bestIndex_;
+
+    IndexParams bestParams_;
+    SearchParams bestSearchParams_;
+
+    Matrix<ElementType> sampledDataset_;
+    Matrix<ElementType> testDataset_;
+    Matrix<int> gt_matches_;
+
+    float speedup_;
+
+    /**
+     * The dataset used by this index
+     */
+    const Matrix<ElementType> dataset_;
+
+    /**
+     * Index parameters
+     */
+    float target_precision_;
+    float build_weight_;
+    float memory_weight_;
+    float sample_fraction_;
+
+    Distance distance_;
+
+
 };
+}
 
-} // namespace cvflann
+#endif /* OPENCV_FLANN_AUTOTUNED_INDEX_H_ */
-
-#endif /* _OPENCV_AUTOTUNEDINDEX_H_ */

modules/flann/include/opencv2/flann/composite_index.h

@@ -28,135 +28,167 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_COMPOSITETREE_H_
+#ifndef OPENCV_FLANN_COMPOSITE_INDEX_H_
-#define _OPENCV_COMPOSITETREE_H_
+#define OPENCV_FLANN_COMPOSITE_INDEX_H_
 
-#include "opencv2/flann/general.h"
+#include "general.h"
-#include "opencv2/flann/nn_index.h"
+#include "nn_index.h"
+#include "kdtree_index.h"
+#include "kmeans_index.h"
 
 namespace cvflann
 {
 
-
+/**
-struct CompositeIndexParams : public IndexParams {
+ * Index parameters for the CompositeIndex.
-	CompositeIndexParams(int trees_ = 4, int branching_ = 32, int iterations_ = 11,
+ */
-			flann_centers_init_t centers_init_ = FLANN_CENTERS_RANDOM, float cb_index_ = 0.2 ) :
+struct CompositeIndexParams : public IndexParams
-		IndexParams(FLANN_INDEX_COMPOSITE),
+{
-		trees(trees_),
+    CompositeIndexParams(int trees = 4, int branching = 32, int iterations = 11,
-		branching(branching_),
+                         flann_centers_init_t centers_init = FLANN_CENTERS_RANDOM, float cb_index = 0.2 )
-		iterations(iterations_),
+    {
-		centers_init(centers_init_),
+        (*this)["algorithm"] = FLANN_INDEX_KMEANS;
-		cb_index(cb_index_) {};
+        // number of randomized trees to use (for kdtree)
-
+        (*this)["trees"] = trees;
-	int trees;                 // number of randomized trees to use (for kdtree)
+        // branching factor
-	int branching;             // branching factor (for kmeans tree)
+        (*this)["branching"] = branching;
-	int iterations;            // max iterations to perform in one kmeans clustering (kmeans tree)
+        // max iterations to perform in one kmeans clustering (kmeans tree)
-	flann_centers_init_t centers_init;          // algorithm used for picking the initial cluster centers for kmeans tree
+        (*this)["iterations"] = iterations;
-    float cb_index;            // cluster boundary index. Used when searching the kmeans tree
+        // algorithm used for picking the initial cluster centers for kmeans tree
-
+        (*this)["centers_init"] = centers_init;
-	void print() const
+        // cluster boundary index. Used when searching the kmeans tree
-	{
+        (*this)["cb_index"] = cb_index;
-		logger().info("Index type: %d\n",(int)algorithm);
+    }
-		logger().info("Trees: %d\n", trees);
-		logger().info("Branching: %d\n", branching);
-		logger().info("Iterations: %d\n", iterations);
-		logger().info("Centres initialisation: %d\n", centers_init);
-		logger().info("Cluster boundary weight: %g\n", cb_index);
-	}
 };
 
 
-
+/**
-template <typename ELEM_TYPE, typename DIST_TYPE = typename DistType<ELEM_TYPE>::type >
+ * This index builds a kd-tree index and a k-means index and performs nearest
-class CompositeIndex : public NNIndex<ELEM_TYPE>
+ * neighbour search both indexes. This gives a slight boost in search performance
+ * as some of the neighbours that are missed by one index are found by the other.
+ */
+template <typename Distance>
+class CompositeIndex : public NNIndex<Distance>
 {
-	KMeansIndex<ELEM_TYPE, DIST_TYPE>* kmeans;
-	KDTreeIndex<ELEM_TYPE, DIST_TYPE>* kdtree;
-
-    const Matrix<ELEM_TYPE> dataset;
-
-    const IndexParams& index_params;
-
-	CompositeIndex& operator=(const CompositeIndex&);
-	CompositeIndex(const CompositeIndex&);
 public:
+    typedef typename Distance::ElementType ElementType;
+    typedef typename Distance::ResultType DistanceType;
 
-	CompositeIndex(const Matrix<ELEM_TYPE>& inputData, const CompositeIndexParams& params = CompositeIndexParams() ) :
+    /**
-		dataset(inputData), index_params(params)
+     * Index constructor
-	{
+     * @param inputData dataset containing the points to index
-		KDTreeIndexParams kdtree_params(params.trees);
+     * @param params Index parameters
-		KMeansIndexParams kmeans_params(params.branching, params.iterations, params.centers_init, params.cb_index);
+     * @param d Distance functor
+     * @return
+     */
+    CompositeIndex(const Matrix<ElementType>& inputData, const IndexParams& params = CompositeIndexParams(),
+                   Distance d = Distance()) : index_params_(params)
+    {
+        kdtree_index_ = new KDTreeIndex<Distance>(inputData, params, d);
+        kmeans_index_ = new KMeansIndex<Distance>(inputData, params, d);
 
-		kdtree = new KDTreeIndex<ELEM_TYPE, DIST_TYPE>(inputData,kdtree_params);
+    }
-		kmeans = new KMeansIndex<ELEM_TYPE, DIST_TYPE>(inputData,kmeans_params);
 
-	}
+    CompositeIndex(const CompositeIndex&);
-
+    CompositeIndex& operator=(const CompositeIndex&);
-	virtual ~CompositeIndex()
-	{
-		delete kdtree;
-		delete kmeans;
-	}
 
+    virtual ~CompositeIndex()
+    {
+        delete kdtree_index_;
+        delete kmeans_index_;
+    }
 
+    /**
+     * @return The index type
+     */
     flann_algorithm_t getType() const
     {
         return FLANN_INDEX_COMPOSITE;
     }
 
-
+    /**
+     * @return Size of the index
+     */
     size_t size() const
-	{
+    {
-		return dataset.rows;
+        return kdtree_index_->size();
-	}
+    }
 
-	size_t veclen() const
+    /**
-	{
+     * \returns The dimensionality of the features in this index.
-		return dataset.cols;
+     */
-	}
+    size_t veclen() const
+    {
+        return kdtree_index_->veclen();
+    }
 
+    /**
+     * \returns The amount of memory (in bytes) used by the index.
+     */
+    int usedMemory() const
+    {
+        return kmeans_index_->usedMemory() + kdtree_index_->usedMemory();
+    }
 
-	int usedMemory() const
+    /**
-	{
+     * \brief Builds the index
-		return kmeans->usedMemory()+kdtree->usedMemory();
+     */
-	}
+    void buildIndex()
-
+    {
-	void buildIndex()
+        Logger::info("Building kmeans tree...\n");
-	{
+        kmeans_index_->buildIndex();
-		logger().info("Building kmeans tree...\n");
+        Logger::info("Building kdtree tree...\n");
-		kmeans->buildIndex();
+        kdtree_index_->buildIndex();
-		logger().info("Building kdtree tree...\n");
+    }
-		kdtree->buildIndex();
-	}
-
 
+    /**
+     * \brief Saves the index to a stream
+     * \param stream The stream to save the index to
+     */
     void saveIndex(FILE* stream)
     {
-    	kmeans->saveIndex(stream);
+        kmeans_index_->saveIndex(stream);
-    	kdtree->saveIndex(stream);
+        kdtree_index_->saveIndex(stream);
     }
 
-
+    /**
+     * \brief Loads the index from a stream
+     * \param stream The stream from which the index is loaded
+     */
     void loadIndex(FILE* stream)
     {
-    	kmeans->loadIndex(stream);
+        kmeans_index_->loadIndex(stream);
-    	kdtree->loadIndex(stream);
+        kdtree_index_->loadIndex(stream);
     }
 
-	void findNeighbors(ResultSet<ELEM_TYPE>& result, const ELEM_TYPE* vec, const SearchParams& searchParams)
+    /**
-	{
+     * \returns The index parameters
-		kmeans->findNeighbors(result,vec,searchParams);
+     */
-		kdtree->findNeighbors(result,vec,searchParams);
+    IndexParams getParameters() const
-	}
+    {
+        return index_params_;
+    }
 
-	const IndexParams* getParameters() const
+    /**
-	{
+     * \brief Method that searches for nearest-neighbours
-		return &index_params;
+     */
-	}
+    void findNeighbors(ResultSet<DistanceType>& result, const ElementType* vec, const SearchParams& searchParams)
+    {
+        kmeans_index_->findNeighbors(result, vec, searchParams);
+        kdtree_index_->findNeighbors(result, vec, searchParams);
+    }
 
+private:
+    /** The k-means index */
+    KMeansIndex<Distance>* kmeans_index_;
 
+    /** The kd-tree index */
+    KDTreeIndex<Distance>* kdtree_index_;
+
+    /** The index parameters */
+    const IndexParams index_params_;
 };
 
-} // namespace cvflann
+}
 
-#endif //_OPENCV_COMPOSITETREE_H_
+#endif //OPENCV_FLANN_COMPOSITE_INDEX_H_

modules/flann/include/opencv2/flann/config.h

@@ -0,0 +1,35 @@
+/***********************************************************************
+ * Software License Agreement (BSD License)
+ *
+ * Copyright 2008-2011  Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
+ * Copyright 2008-2011  David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *************************************************************************/
+
+
+#ifndef OPENCV_FLANN_CONFIG_H_
+#define OPENCV_FLANN_CONFIG_H_
+
+#define FLANN_VERSION "1.6.10"
+
+#endif /* OPENCV_FLANN_CONFIG_H_ */

modules/flann/include/opencv2/flann/defines.h

@@ -0,0 +1,162 @@
+/***********************************************************************
+ * Software License Agreement (BSD License)
+ *
+ * Copyright 2008-2011  Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
+ * Copyright 2008-2011  David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *************************************************************************/
+
+
+#ifndef OPENCV_FLANN_DEFINES_H_
+#define OPENCV_FLANN_DEFINES_H_
+
+#include "config.h"
+
+#ifdef WIN32
+/* win32 dll export/import directives */
+ #ifdef FLANN_EXPORTS
+  #define FLANN_EXPORT __declspec(dllexport)
+ #elif defined(FLANN_STATIC)
+  #define FLANN_EXPORT
+ #else
+  #define FLANN_EXPORT __declspec(dllimport)
+ #endif
+#else
+/* unix needs nothing */
+ #define FLANN_EXPORT
+#endif
+
+
+#ifdef __GNUC__
+#define FLANN_DEPRECATED __attribute__ ((deprecated))
+#elif defined(_MSC_VER)
+#define FLANN_DEPRECATED __declspec(deprecated)
+#else
+#pragma message("WARNING: You need to implement FLANN_DEPRECATED for this compiler")
+#define FLANN_DEPRECATED
+#endif
+
+
+#if __amd64__ || __x86_64__ || _WIN64 || _M_X64
+#define FLANN_PLATFORM_64_BIT
+#else
+#define FLANN_PLATFORM_32_BIT
+#endif
+
+
+#define FLANN_ARRAY_LEN(a) (sizeof(a)/sizeof(a[0]))
+
+/* Nearest neighbour index algorithms */
+enum flann_algorithm_t
+{
+    FLANN_INDEX_LINEAR = 0,
+    FLANN_INDEX_KDTREE = 1,
+    FLANN_INDEX_KMEANS = 2,
+    FLANN_INDEX_COMPOSITE = 3,
+    FLANN_INDEX_KDTREE_SINGLE = 4,
+    FLANN_INDEX_HIERARCHICAL = 5,
+    FLANN_INDEX_LSH = 6,
+    FLANN_INDEX_SAVED = 254,
+    FLANN_INDEX_AUTOTUNED = 255,
+
+    // deprecated constants, should use the FLANN_INDEX_* ones instead
+    LINEAR = 0,
+    KDTREE = 1,
+    KMEANS = 2,
+    COMPOSITE = 3,
+    KDTREE_SINGLE = 4,
+    SAVED = 254,
+    AUTOTUNED = 255
+};
+
+
+
+enum flann_centers_init_t
+{
+    FLANN_CENTERS_RANDOM = 0,
+    FLANN_CENTERS_GONZALES = 1,
+    FLANN_CENTERS_KMEANSPP = 2,
+
+    // deprecated constants, should use the FLANN_CENTERS_* ones instead
+    CENTERS_RANDOM = 0,
+    CENTERS_GONZALES = 1,
+    CENTERS_KMEANSPP = 2
+};
+
+enum flann_log_level_t
+{
+    FLANN_LOG_NONE = 0,
+    FLANN_LOG_FATAL = 1,
+    FLANN_LOG_ERROR = 2,
+    FLANN_LOG_WARN = 3,
+    FLANN_LOG_INFO = 4,
+};
+
+enum flann_distance_t
+{
+    FLANN_DIST_EUCLIDEAN = 1,
+    FLANN_DIST_L2 = 1,
+    FLANN_DIST_MANHATTAN = 2,
+    FLANN_DIST_L1 = 2,
+    FLANN_DIST_MINKOWSKI = 3,
+    FLANN_DIST_MAX   = 4,
+    FLANN_DIST_HIST_INTERSECT   = 5,
+    FLANN_DIST_HELLINGER = 6,
+    FLANN_DIST_CHI_SQUARE = 7,
+    FLANN_DIST_CS         = 7,
+    FLANN_DIST_KULLBACK_LEIBLER  = 8,
+    FLANN_DIST_KL                = 8,
+
+    // deprecated constants, should use the FLANN_DIST_* ones instead
+    EUCLIDEAN = 1,
+    MANHATTAN = 2,
+    MINKOWSKI = 3,
+    MAX_DIST   = 4,
+    HIST_INTERSECT   = 5,
+    HELLINGER = 6,
+    CS         = 7,
+    KL         = 8,
+    KULLBACK_LEIBLER  = 8
+};
+
+enum flann_datatype_t
+{
+    FLANN_INT8 = 0,
+    FLANN_INT16 = 1,
+    FLANN_INT32 = 2,
+    FLANN_INT64 = 3,
+    FLANN_UINT8 = 4,
+    FLANN_UINT16 = 5,
+    FLANN_UINT32 = 6,
+    FLANN_UINT64 = 7,
+    FLANN_FLOAT32 = 8,
+    FLANN_FLOAT64 = 9
+};
+
+enum
+{
+    FLANN_CHECKS_UNLIMITED = -1,
+    FLANN_CHECKS_AUTOTUNED = -2
+};
+
+#endif /* OPENCV_FLANN_DEFINES_H_ */

modules/flann/include/opencv2/flann/dummy.h

@@ -0,0 +1,16 @@
+
+#ifndef OPENCV_FLANN_DUMMY_H_
+#define OPENCV_FLANN_DUMMY_H_
+
+namespace cvflann
+{
+
+#if (defined WIN32 || defined _WIN32 || defined WINCE) && defined CVAPI_EXPORTS
+__declspec(dllexport)
+#endif
+void dummyfunc();
+
+}
+
+
+#endif  /* OPENCV_FLANN_DUMMY_H_ */

modules/flann/include/opencv2/flann/dynamic_bitset.h

@@ -0,0 +1,152 @@
+/***********************************************************************
+ * Software License Agreement (BSD License)
+ *
+ * Copyright 2008-2009  Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
+ * Copyright 2008-2009  David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
+ *
+ * THE BSD LICENSE
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *************************************************************************/
+
+/***********************************************************************
+ * Author: Vincent Rabaud
+ *************************************************************************/
+
+#ifndef OPENCV_FLANN_DYNAMIC_BITSET_H_
+#define OPENCV_FLANN_DYNAMIC_BITSET_H_
+
+//#define FLANN_USE_BOOST 1
+#if FLANN_USE_BOOST
+#include <boost/dynamic_bitset.hpp>
+typedef boost::dynamic_bitset<> DynamicBitset;
+#else
+
+#include <limits.h>
+
+#include "dist.h"
+
+/** Class re-implementing the boost version of it
+ * This helps not depending on boost, it also does not do the bound checks
+ * and has a way to reset a block for speed
+ */
+class DynamicBitset
+{
+public:
+    /** @param default constructor
+     */
+    DynamicBitset()
+    {
+    }
+
+    /** @param only constructor we use in our code
+     * @param the size of the bitset (in bits)
+     */
+    DynamicBitset(size_t size)
+    {
+        resize(size);
+        reset();
+    }
+
+    /** Sets all the bits to 0
+     */
+    void clear()
+    {
+        std::fill(bitset_.begin(), bitset_.end(), 0);
+    }
+
+    /** @brief checks if the bitset is empty
+     * @return true if the bitset is empty
+     */
+    bool empty() const
+    {
+        return bitset_.empty();
+    }
+
+    /** @param set all the bits to 0
+     */
+    void reset()
+    {
+        std::fill(bitset_.begin(), bitset_.end(), 0);
+    }
+
+    /** @brief set one bit to 0
+     * @param
+     */
+    void reset(size_t index)
+    {
+        bitset_[index / cell_bit_size_] &= ~(size_t(1) << (index % cell_bit_size_));
+    }
+
+    /** @brief sets a specific bit to 0, and more bits too
+     * This function is useful when resetting a given set of bits so that the
+     * whole bitset ends up being 0: if that's the case, we don't care about setting
+     * other bits to 0
+     * @param
+     */
+    void reset_block(size_t index)
+    {
+        bitset_[index / cell_bit_size_] = 0;
+    }
+
+    /** @param resize the bitset so that it contains at least size bits
+     * @param size
+     */
+    void resize(size_t size)
+    {
+        size_ = size;
+        bitset_.resize(size / cell_bit_size_ + 1);
+    }
+
+    /** @param set a bit to true
+     * @param index the index of the bit to set to 1
+     */
+    void set(size_t index)
+    {
+        bitset_[index / cell_bit_size_] |= size_t(1) << (index % cell_bit_size_);
+    }
+
+    /** @param gives the number of contained bits
+     */
+    size_t size() const
+    {
+        return size_;
+    }
+
+    /** @param check if a bit is set
+     * @param index the index of the bit to check
+     * @return true if the bit is set
+     */
+    bool test(size_t index) const
+    {
+        return (bitset_[index / cell_bit_size_] & (size_t(1) << (index % cell_bit_size_))) != 0;
+    }
+
+private:
+    std::vector<size_t> bitset_;
+    size_t size_;
+    static const unsigned int cell_bit_size_ = CHAR_BIT * sizeof(size_t);
+};
+
+#endif
+
+#endif // OPENCV_FLANN_DYNAMIC_BITSET_H_

modules/flann/include/opencv2/flann/flann.hpp

@@ -45,7 +45,17 @@
 
 #ifdef __cplusplus
 
+#include "opencv2/core/types_c.h"
+#include "opencv2/core/core.hpp"
 #include "opencv2/flann/flann_base.hpp"
+#include "opencv2/flann/miniflann.hpp"
+
+namespace cvflann
+{
+    CV_EXPORTS flann_distance_t flann_distance_type();
+    FLANN_DEPRECATED CV_EXPORTS void set_distance_type(flann_distance_t distance_type, int order);
+}
+
 
 namespace cv
 {
@@ -61,132 +71,345 @@ template <> struct CvType<int> { static int type() { return CV_32S; } };
 template <> struct CvType<float> { static int type() { return CV_32F; } };
 template <> struct CvType<double> { static int type() { return CV_64F; } };
 
-    
-using ::cvflann::IndexParams;
-using ::cvflann::LinearIndexParams;
-using ::cvflann::KDTreeIndexParams;
-using ::cvflann::KMeansIndexParams;
-using ::cvflann::CompositeIndexParams;
-using ::cvflann::AutotunedIndexParams;
-using ::cvflann::SavedIndexParams;
 
-using ::cvflann::SearchParams;
+// bring the flann parameters into this namespace
+using ::cvflann::get_param;
+using ::cvflann::print_params;
+
+// bring the flann distances into this namespace
+using ::cvflann::L2_Simple;
+using ::cvflann::L2;
+using ::cvflann::L1;
+using ::cvflann::MinkowskiDistance;
+using ::cvflann::MaxDistance;
+using ::cvflann::HammingLUT;
+using ::cvflann::Hamming;
+using ::cvflann::Hamming2;
+using ::cvflann::HistIntersectionDistance;
+using ::cvflann::HellingerDistance;
+using ::cvflann::ChiSquareDistance;
+using ::cvflann::KL_Divergence;
 
 
-template <typename T>
-class CV_EXPORTS Index_ {
-	::cvflann::Index<T>* nnIndex;
 
+template <typename Distance>
+class GenericIndex 
+{
 public:
+        typedef typename Distance::ElementType ElementType;
+        typedef typename Distance::ResultType DistanceType;
+
+        GenericIndex(const Mat& features, const IndexParams& params, Distance distance = Distance());
+
+        ~GenericIndex();
+
+        void knnSearch(const vector<ElementType>& query, vector<int>& indices, 
+                       vector<DistanceType>& dists, int knn, const SearchParams& params);
+        void knnSearch(const Mat& queries, Mat& indices, Mat& dists, int knn, const SearchParams& params);
+
+        int radiusSearch(const vector<ElementType>& query, vector<int>& indices, 
+                         vector<DistanceType>& dists, DistanceType radius, const SearchParams& params);
+        int radiusSearch(const Mat& query, Mat& indices, Mat& dists, 
+                         DistanceType radius, const SearchParams& params);
+
+        void save(std::string filename) { nnIndex->save(filename); }
+
+        int veclen() const { return nnIndex->veclen(); }
+
+        int size() const { return nnIndex->size(); }
+
+        IndexParams getParameters() { return nnIndex->getParameters(); }
+
+        FLANN_DEPRECATED const IndexParams* getIndexParameters() { return nnIndex->getIndexParameters(); }
+
+private:
+        ::cvflann::Index<Distance>* nnIndex;
+};
+
+
+#define FLANN_DISTANCE_CHECK \
+    if ( ::cvflann::flann_distance_type() != FLANN_DIST_L2) { \
+        printf("[WARNING] You are using cv::flann::Index (or cv::flann::GenericIndex) and have also changed "\
+        "the distance using cvflann::set_distance_type. This is no longer working as expected "\
+        "(cv::flann::Index always uses L2). You should create the index templated on the distance, "\
+        "for example for L1 distance use: GenericIndex< L1<float> > \n"); \
+    }
+    
+
+template <typename Distance>
+GenericIndex<Distance>::GenericIndex(const Mat& dataset, const IndexParams& params, Distance distance)
+{
+    CV_Assert(dataset.type() == CvType<ElementType>::type());
+    CV_Assert(dataset.isContinuous());
+    ::cvflann::Matrix<ElementType> m_dataset((ElementType*)dataset.ptr<ElementType>(0), dataset.rows, dataset.cols);
+    
+    nnIndex = new ::cvflann::Index<Distance>(m_dataset, params, distance);
+    
+    FLANN_DISTANCE_CHECK
+    
+    nnIndex->buildIndex();
+}
+
+template <typename Distance>
+GenericIndex<Distance>::~GenericIndex()
+{
+    delete nnIndex;
+}
+
+template <typename Distance>
+void GenericIndex<Distance>::knnSearch(const vector<ElementType>& query, vector<int>& indices, vector<DistanceType>& dists, int knn, const SearchParams& searchParams)
+{
+    ::cvflann::Matrix<ElementType> m_query((ElementType*)&query[0], 1, query.size());
+    ::cvflann::Matrix<int> m_indices(&indices[0], 1, indices.size());
+    ::cvflann::Matrix<DistanceType> m_dists(&dists[0], 1, dists.size());
+
+    FLANN_DISTANCE_CHECK
+
+    nnIndex->knnSearch(m_query,m_indices,m_dists,knn,searchParams);
+}
+
+
+template <typename Distance>
+void GenericIndex<Distance>::knnSearch(const Mat& queries, Mat& indices, Mat& dists, int knn, const SearchParams& searchParams)
+{
+    CV_Assert(queries.type() == CvType<ElementType>::type());
+    CV_Assert(queries.isContinuous());
+    ::cvflann::Matrix<ElementType> m_queries((ElementType*)queries.ptr<ElementType>(0), queries.rows, queries.cols);
+    
+    CV_Assert(indices.type() == CV_32S);
+    CV_Assert(indices.isContinuous());
+    ::cvflann::Matrix<int> m_indices((int*)indices.ptr<int>(0), indices.rows, indices.cols);
+    
+    CV_Assert(dists.type() == CvType<DistanceType>::type());
+    CV_Assert(dists.isContinuous());
+    ::cvflann::Matrix<DistanceType> m_dists((DistanceType*)dists.ptr<DistanceType>(0), dists.rows, dists.cols);
+
+    FLANN_DISTANCE_CHECK
+    
+    nnIndex->knnSearch(m_queries,m_indices,m_dists,knn, searchParams);
+}
+
+template <typename Distance>
+int GenericIndex<Distance>::radiusSearch(const vector<ElementType>& query, vector<int>& indices, vector<DistanceType>& dists, DistanceType radius, const SearchParams& searchParams)
+{
+    ::cvflann::Matrix<ElementType> m_query((ElementType*)&query[0], 1, query.size());
+    ::cvflann::Matrix<int> m_indices(&indices[0], 1, indices.size());
+    ::cvflann::Matrix<DistanceType> m_dists(&dists[0], 1, dists.size());
+
+    FLANN_DISTANCE_CHECK
+    
+    return nnIndex->radiusSearch(m_query,m_indices,m_dists,radius,searchParams);
+}
+
+template <typename Distance>
+int GenericIndex<Distance>::radiusSearch(const Mat& query, Mat& indices, Mat& dists, DistanceType radius, const SearchParams& searchParams)
+{
+    CV_Assert(query.type() == CvType<ElementType>::type());
+    CV_Assert(query.isContinuous());
+    ::cvflann::Matrix<ElementType> m_query((ElementType*)query.ptr<ElementType>(0), query.rows, query.cols);
+    
+    CV_Assert(indices.type() == CV_32S);
+    CV_Assert(indices.isContinuous());
+    ::cvflann::Matrix<int> m_indices((int*)indices.ptr<int>(0), indices.rows, indices.cols);
+    
+    CV_Assert(dists.type() == CvType<DistanceType>::type());
+    CV_Assert(dists.isContinuous());
+    ::cvflann::Matrix<DistanceType> m_dists((DistanceType*)dists.ptr<DistanceType>(0), dists.rows, dists.cols);
+    
+    FLANN_DISTANCE_CHECK
+    
+    return nnIndex->radiusSearch(m_query,m_indices,m_dists,radius,searchParams);
+}
+
+/**
+ * @deprecated Use GenericIndex class instead
+ */
+template <typename T>
+class FLANN_DEPRECATED Index_ {
+public:
+        typedef typename L2<T>::ElementType ElementType;
+        typedef typename L2<T>::ResultType DistanceType;
+
 	Index_(const Mat& features, const IndexParams& params);
 
 	~Index_();
 
-	void knnSearch(const vector<T>& query, vector<int>& indices, vector<float>& dists, int knn, const SearchParams& params);
+	void knnSearch(const vector<ElementType>& query, vector<int>& indices, vector<DistanceType>& dists, int knn, const SearchParams& params);
 	void knnSearch(const Mat& queries, Mat& indices, Mat& dists, int knn, const SearchParams& params);
 
-	int radiusSearch(const vector<T>& query, vector<int>& indices, vector<float>& dists, float radius, const SearchParams& params);
+	int radiusSearch(const vector<ElementType>& query, vector<int>& indices, vector<DistanceType>& dists, DistanceType radius, const SearchParams& params);
-	int radiusSearch(const Mat& query, Mat& indices, Mat& dists, float radius, const SearchParams& params);
+	int radiusSearch(const Mat& query, Mat& indices, Mat& dists, DistanceType radius, const SearchParams& params);
 
-	void save(std::string filename) { nnIndex->save(filename); }
+	void save(std::string filename) 
+        { 
+            if (nnIndex_L1) nnIndex_L1->save(filename);
+            if (nnIndex_L2) nnIndex_L2->save(filename);
+        }
 
-	int veclen() const { return nnIndex->veclen(); }
+	int veclen() const 
+	{ 
+            if (nnIndex_L1) return nnIndex_L1->veclen();
+            if (nnIndex_L2) return nnIndex_L2->veclen();            
+        }
 
-	int size() const { return nnIndex->size(); }
+	int size() const 
+	{ 
+            if (nnIndex_L1) return nnIndex_L1->size();
+            if (nnIndex_L2) return nnIndex_L2->size(); 
+        }
 
-	const IndexParams* getIndexParameters() { return nnIndex->getIndexParameters(); }
+        IndexParams getParameters() 
+        { 
+            if (nnIndex_L1) return nnIndex_L1->getParameters();
+            if (nnIndex_L2) return nnIndex_L2->getParameters();
+            
+        }
 
+        FLANN_DEPRECATED const IndexParams* getIndexParameters() 
+        { 
+            if (nnIndex_L1) return nnIndex_L1->getIndexParameters();
+            if (nnIndex_L2) return nnIndex_L2->getIndexParameters(); 
+        }
+
+private:
+        // providing backwards compatibility for L2 and L1 distances (most common)
+        ::cvflann::Index< L2<ElementType> >* nnIndex_L2;
+        ::cvflann::Index< L1<ElementType> >* nnIndex_L1;
 };
 
 
 template <typename T>
 Index_<T>::Index_(const Mat& dataset, const IndexParams& params)
 {
-    CV_Assert(dataset.type() == CvType<T>::type());
+    printf("[WARNING] The cv::flann::Index_<T> class is deperecated, use cv::flann::GenericIndex<Distance> instead\n");
-    CV_Assert(dataset.isContinuous());
-    ::cvflann::Matrix<T> m_dataset((T*)dataset.ptr<T>(0), dataset.rows, dataset.cols);
     
-    nnIndex = new ::cvflann::Index<T>(m_dataset, params);
+    CV_Assert(dataset.type() == CvType<ElementType>::type());
-    nnIndex->buildIndex();
+    CV_Assert(dataset.isContinuous());
+    ::cvflann::Matrix<ElementType> m_dataset((ElementType*)dataset.ptr<ElementType>(0), dataset.rows, dataset.cols);
+    
+    if ( ::cvflann::flann_distance_type() == FLANN_DIST_L2 ) {
+        nnIndex_L1 = NULL;
+        nnIndex_L2 = new ::cvflann::Index< L2<ElementType> >(m_dataset, params);
+    }
+    else if ( ::cvflann::flann_distance_type() == FLANN_DIST_L1 ) {
+        nnIndex_L1 = new ::cvflann::Index< L1<ElementType> >(m_dataset, params);
+        nnIndex_L2 = NULL;        
+    }
+    else {
+        printf("[ERROR] cv::flann::Index_<T> only provides backwards compatibility for the L1 and L2 distances. "
+        "For other distance types you must use cv::flann::GenericIndex<Distance>\n");
+        CV_Assert(0);
+    }
+    if (nnIndex_L1) nnIndex_L1->buildIndex();
+    if (nnIndex_L2) nnIndex_L2->buildIndex();
 }
 
 template <typename T>
 Index_<T>::~Index_()
 {
-    delete nnIndex;
+    if (nnIndex_L1) delete nnIndex_L1;
+    if (nnIndex_L2) delete nnIndex_L2;
 }
 
 template <typename T>
-void Index_<T>::knnSearch(const vector<T>& query, vector<int>& indices, vector<float>& dists, int knn, const SearchParams& searchParams)
+void Index_<T>::knnSearch(const vector<ElementType>& query, vector<int>& indices, vector<DistanceType>& dists, int knn, const SearchParams& searchParams)
 {
-    ::cvflann::Matrix<T> m_query((T*)&query[0], 1, (int)query.size());
+    ::cvflann::Matrix<ElementType> m_query((ElementType*)&query[0], 1, query.size());
-    ::cvflann::Matrix<int> m_indices(&indices[0], 1, (int)indices.size());
+    ::cvflann::Matrix<int> m_indices(&indices[0], 1, indices.size());
-    ::cvflann::Matrix<float> m_dists(&dists[0], 1, (int)dists.size());
+    ::cvflann::Matrix<DistanceType> m_dists(&dists[0], 1, dists.size());
     
-    nnIndex->knnSearch(m_query,m_indices,m_dists,knn,searchParams);
+    if (nnIndex_L1) nnIndex_L1->knnSearch(m_query,m_indices,m_dists,knn,searchParams);
+    if (nnIndex_L2) nnIndex_L2->knnSearch(m_query,m_indices,m_dists,knn,searchParams);
 }
 
 
 template <typename T>
 void Index_<T>::knnSearch(const Mat& queries, Mat& indices, Mat& dists, int knn, const SearchParams& searchParams)
 {
-    CV_Assert(queries.type() == CvType<T>::type());
+    CV_Assert(queries.type() == CvType<ElementType>::type());
     CV_Assert(queries.isContinuous());
-    ::cvflann::Matrix<T> m_queries((T*)queries.ptr<T>(0), queries.rows, queries.cols);
+    ::cvflann::Matrix<ElementType> m_queries((ElementType*)queries.ptr<ElementType>(0), queries.rows, queries.cols);
     
     CV_Assert(indices.type() == CV_32S);
     CV_Assert(indices.isContinuous());
     ::cvflann::Matrix<int> m_indices((int*)indices.ptr<int>(0), indices.rows, indices.cols);
     
-    CV_Assert(dists.type() == CV_32F);
+    CV_Assert(dists.type() == CvType<DistanceType>::type());
     CV_Assert(dists.isContinuous());
-    ::cvflann::Matrix<float> m_dists((float*)dists.ptr<float>(0), dists.rows, dists.cols);
+    ::cvflann::Matrix<DistanceType> m_dists((DistanceType*)dists.ptr<DistanceType>(0), dists.rows, dists.cols);
-    
+
-    nnIndex->knnSearch(m_queries,m_indices,m_dists,knn, searchParams);
+    if (nnIndex_L1) nnIndex_L1->knnSearch(m_queries,m_indices,m_dists,knn, searchParams);
+    if (nnIndex_L2) nnIndex_L2->knnSearch(m_queries,m_indices,m_dists,knn, searchParams);
 }
 
 template <typename T>
-int Index_<T>::radiusSearch(const vector<T>& query, vector<int>& indices, vector<float>& dists, float radius, const SearchParams& searchParams)
+int Index_<T>::radiusSearch(const vector<ElementType>& query, vector<int>& indices, vector<DistanceType>& dists, DistanceType radius, const SearchParams& searchParams)
 {
-    ::cvflann::Matrix<T> m_query((T*)&query[0], 1, (int)query.size());
+    ::cvflann::Matrix<ElementType> m_query((ElementType*)&query[0], 1, query.size());
-    ::cvflann::Matrix<int> m_indices(&indices[0], 1, (int)indices.size());
+    ::cvflann::Matrix<int> m_indices(&indices[0], 1, indices.size());
-    ::cvflann::Matrix<float> m_dists(&dists[0], 1, (int)dists.size());
+    ::cvflann::Matrix<DistanceType> m_dists(&dists[0], 1, dists.size());
     
-    return nnIndex->radiusSearch(m_query,m_indices,m_dists,radius,searchParams);
+    if (nnIndex_L1) return nnIndex_L1->radiusSearch(m_query,m_indices,m_dists,radius,searchParams);
+    if (nnIndex_L2) return nnIndex_L2->radiusSearch(m_query,m_indices,m_dists,radius,searchParams);
 }
 
 template <typename T>
-int Index_<T>::radiusSearch(const Mat& query, Mat& indices, Mat& dists, float radius, const SearchParams& searchParams)
+int Index_<T>::radiusSearch(const Mat& query, Mat& indices, Mat& dists, DistanceType radius, const SearchParams& searchParams)
 {
-    CV_Assert(query.type() == CvType<T>::type());
+    CV_Assert(query.type() == CvType<ElementType>::type());
     CV_Assert(query.isContinuous());
-    ::cvflann::Matrix<T> m_query((T*)query.ptr<T>(0), query.rows, query.cols);
+    ::cvflann::Matrix<ElementType> m_query((ElementType*)query.ptr<ElementType>(0), query.rows, query.cols);
     
     CV_Assert(indices.type() == CV_32S);
     CV_Assert(indices.isContinuous());
     ::cvflann::Matrix<int> m_indices((int*)indices.ptr<int>(0), indices.rows, indices.cols);
     
-    CV_Assert(dists.type() == CV_32F);
+    CV_Assert(dists.type() == CvType<DistanceType>::type());
     CV_Assert(dists.isContinuous());
-    ::cvflann::Matrix<float> m_dists((float*)dists.ptr<float>(0), dists.rows, dists.cols);
+    ::cvflann::Matrix<DistanceType> m_dists((DistanceType*)dists.ptr<DistanceType>(0), dists.rows, dists.cols);
     
-    return nnIndex->radiusSearch(m_query,m_indices,m_dists,radius,searchParams);
+    if (nnIndex_L1) return nnIndex_L1->radiusSearch(m_query,m_indices,m_dists,radius,searchParams);
+    if (nnIndex_L2) return nnIndex_L2->radiusSearch(m_query,m_indices,m_dists,radius,searchParams);
+}
+
+
+template <typename Distance>
+int hierarchicalClustering(const Mat& features, Mat& centers, const KMeansIndexParams& params,
+                           Distance d = Distance())
+{
+    typedef typename Distance::ElementType ElementType;
+    typedef typename Distance::ResultType DistanceType;
+    
+    CV_Assert(features.type() == CvType<ElementType>::type());
+    CV_Assert(features.isContinuous());
+    ::cvflann::Matrix<ElementType> m_features((ElementType*)features.ptr<ElementType>(0), features.rows, features.cols);
+    
+    CV_Assert(centers.type() == CvType<DistanceType>::type());
+    CV_Assert(centers.isContinuous());
+    ::cvflann::Matrix<DistanceType> m_centers((DistanceType*)centers.ptr<DistanceType>(0), centers.rows, centers.cols);
+
+    return ::cvflann::hierarchicalClustering<Distance>(m_features, m_centers, params, d);
 }
 
-typedef Index_<float> Index;
 
 template <typename ELEM_TYPE, typename DIST_TYPE>
-int hierarchicalClustering(const Mat& features, Mat& centers, const KMeansIndexParams& params)
+FLANN_DEPRECATED int hierarchicalClustering(const Mat& features, Mat& centers, const KMeansIndexParams& params)
 {
-    CV_Assert(features.type() == CvType<ELEM_TYPE>::type());
+    printf("[WARNING] cv::flann::hierarchicalClustering<ELEM_TYPE,DIST_TYPE> is deprecated, use "
-    CV_Assert(features.isContinuous());
+        "cv::flann::hierarchicalClustering<Distance> instead\n");
-    ::cvflann::Matrix<ELEM_TYPE> m_features((ELEM_TYPE*)features.ptr<ELEM_TYPE>(0), features.rows, features.cols);
+        
-    
+    if ( ::cvflann::flann_distance_type() == FLANN_DIST_L2 ) {
-    CV_Assert(centers.type() == CvType<DIST_TYPE>::type());
+        return hierarchicalClustering< L2<ELEM_TYPE> >(features, centers, params);
-    CV_Assert(centers.isContinuous());
+    }
-    ::cvflann::Matrix<DIST_TYPE> m_centers((DIST_TYPE*)centers.ptr<DIST_TYPE>(0), centers.rows, centers.cols);
+    else if ( ::cvflann::flann_distance_type() == FLANN_DIST_L1 ) {
-    
+        return hierarchicalClustering< L1<ELEM_TYPE> >(features, centers, params);
-    return ::cvflann::hierarchicalClustering<ELEM_TYPE,DIST_TYPE>(m_features, m_centers, params);
+    }
+    else {
+        printf("[ERROR] cv::flann::hierarchicalClustering<ELEM_TYPE,DIST_TYPE> only provides backwards "
+        "compatibility for the L1 and L2 distances. "
+        "For other distance types you must use cv::flann::hierarchicalClustering<Distance>\n");
+        CV_Assert(0);
+    }
 }
 
 } } // namespace cv::flann

modules/flann/include/opencv2/flann/flann_base.hpp

@@ -28,232 +28,264 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_FLANN_BASE_HPP_
+#ifndef FLANN_BASE_HPP_
-#define _OPENCV_FLANN_BASE_HPP_
+#define FLANN_BASE_HPP_
 
 #include <vector>
 #include <string>
 #include <cassert>
 #include <cstdio>
 
-#include "opencv2/flann/general.h"
+#include "general.h"
-#include "opencv2/flann/matrix.h"
+#include "matrix.h"
-#include "opencv2/flann/result_set.h"
+#include "params.h"
-#include "opencv2/flann/index_testing.h"
+#include "saving.h"
-#include "opencv2/flann/object_factory.h"
-#include "opencv2/flann/saving.h"
 
-#include "opencv2/flann/all_indices.h"
+#include "all_indices.h"
 
 namespace cvflann
 {
 
-
 /**
-Sets the log level used for all flann functions
+ * Sets the log level used for all flann functions
-
+ * @param level Verbosity level
-Params:
-    level = verbosity level
-*/
-CV_EXPORTS void log_verbosity(int level);
-
-
-/**
- * Sets the distance type to use throughout FLANN.
- * If distance type specified is MINKOWSKI, the second argument
- * specifies which order the minkowski distance should have.
  */
-CV_EXPORTS void set_distance_type(flann_distance_t distance_type, int order);
+inline void log_verbosity(int level)
+{
+    if (level >= 0) {
+        Logger::setLevel(level);
+    }
+}
 
-
+/**
-struct CV_EXPORTS SavedIndexParams : public IndexParams {
+ * (Deprecated) Index parameters for creating a saved index.
-	SavedIndexParams(std::string filename_) : IndexParams(FLANN_INDEX_SAVED), filename(filename_) {}
+ */
-
+struct SavedIndexParams : public IndexParams
-	std::string filename;		// filename of the stored index
+{
-
+    SavedIndexParams(std::string filename)
-	void print() const
+    {
-	{
+        (* this)["algorithm"] = FLANN_INDEX_SAVED;
-		logger().info("Index type: %d\n",(int)algorithm);
+        (*this)["filename"] = filename;
-		logger().info("Filename: %s\n", filename.c_str());
+    }
-	}
 };
 
-template<typename T>
-class CV_EXPORTS Index {
-	NNIndex<T>* nnIndex;
-    bool built;
 
+template<typename Distance>
+NNIndex<Distance>* load_saved_index(const Matrix<typename Distance::ElementType>& dataset, const std::string& filename, Distance distance)
+{
+    typedef typename Distance::ElementType ElementType;
+
+    FILE* fin = fopen(filename.c_str(), "rb");
+    if (fin == NULL) {
+        return NULL;
+    }
+    IndexHeader header = load_header(fin);
+    if (header.data_type != Datatype<ElementType>::type()) {
+        throw FLANNException("Datatype of saved index is different than of the one to be created.");
+    }
+    if ((size_t(header.rows) != dataset.rows)||(size_t(header.cols) != dataset.cols)) {
+        throw FLANNException("The index saved belongs to a different dataset");
+    }
+
+    IndexParams params;
+    params["algorithm"] = header.index_type;
+    NNIndex<Distance>* nnIndex = create_index_by_type<Distance>(dataset, params, distance);
+    nnIndex->loadIndex(fin);
+    fclose(fin);
+
+    return nnIndex;
+}
+
+
+template<typename Distance>
+class Index : public NNIndex<Distance>
+{
 public:
-	Index(const Matrix<T>& features, const IndexParams& params);
+    typedef typename Distance::ElementType ElementType;
+    typedef typename Distance::ResultType DistanceType;
 
-	~Index();
+    Index(const Matrix<ElementType>& features, const IndexParams& params, Distance distance = Distance() )
+        : index_params_(params)
+    {
+        flann_algorithm_t index_type = get_param<flann_algorithm_t>(params,"algorithm");
+        loaded_ = false;
 
-	void buildIndex();
+        if (index_type == FLANN_INDEX_SAVED) {
+            nnIndex_ = load_saved_index<Distance>(features, get_param<std::string>(params,"filename"), distance);
+            loaded_ = true;
+        }
+        else {
+            nnIndex_ = create_index_by_type<Distance>(features, params, distance);
+        }
+    }
 
-	void knnSearch(const Matrix<T>& queries, Matrix<int>& indices, Matrix<float>& dists, int knn, const SearchParams& params);
+    ~Index()
+    {
+        delete nnIndex_;
+    }
 
-	int radiusSearch(const Matrix<T>& query, Matrix<int>& indices, Matrix<float>& dists, float radius, const SearchParams& params);
+    /**
+     * Builds the index.
+     */
+    void buildIndex()
+    {
+        if (!loaded_) {
+            nnIndex_->buildIndex();
+        }
+    }
 
-	void save(std::string filename);
+    void save(std::string filename)
+    {
+        FILE* fout = fopen(filename.c_str(), "wb");
+        if (fout == NULL) {
+            throw FLANNException("Cannot open file");
+        }
+        save_header(fout, *nnIndex_);
+        saveIndex(fout);
+        fclose(fout);
+    }
 
-	int veclen() const;
+    /**
+     * \brief Saves the index to a stream
+     * \param stream The stream to save the index to
+     */
+    virtual void saveIndex(FILE* stream)
+    {
+        nnIndex_->saveIndex(stream);
+    }
 
-	int size() const;
+    /**
+     * \brief Loads the index from a stream
+     * \param stream The stream from which the index is loaded
+     */
+    virtual void loadIndex(FILE* stream)
+    {
+        nnIndex_->loadIndex(stream);
+    }
 
-	NNIndex<T>* getIndex() { return nnIndex; }
+    /**
+     * \returns number of features in this index.
+     */
+    size_t veclen() const
+    {
+        return nnIndex_->veclen();
+    }
 
-	const IndexParams* getIndexParameters() { return nnIndex->getParameters(); }
+    /**
+     * \returns The dimensionality of the features in this index.
+     */
+    size_t size() const
+    {
+        return nnIndex_->size();
+    }
+
+    /**
+     * \returns The index type (kdtree, kmeans,...)
+     */
+    flann_algorithm_t getType() const
+    {
+        return nnIndex_->getType();
+    }
+
+    /**
+     * \returns The amount of memory (in bytes) used by the index.
+     */
+    virtual int usedMemory() const
+    {
+        return nnIndex_->usedMemory();
+    }
+
+
+    /**
+     * \returns The index parameters
+     */
+    IndexParams getParameters() const
+    {
+        return nnIndex_->getParameters();
+    }
+
+    /**
+     * \brief Perform k-nearest neighbor search
+     * \param[in] queries The query points for which to find the nearest neighbors
+     * \param[out] indices The indices of the nearest neighbors found
+     * \param[out] dists Distances to the nearest neighbors found
+     * \param[in] knn Number of nearest neighbors to return
+     * \param[in] params Search parameters
+     */
+    void knnSearch(const Matrix<ElementType>& queries, Matrix<int>& indices, Matrix<DistanceType>& dists, int knn, const SearchParams& params)
+    {
+        nnIndex_->knnSearch(queries, indices, dists, knn, params);
+    }
+
+    /**
+     * \brief Perform radius search
+     * \param[in] query The query point
+     * \param[out] indices The indinces of the neighbors found within the given radius
+     * \param[out] dists The distances to the nearest neighbors found
+     * \param[in] radius The radius used for search
+     * \param[in] params Search parameters
+     * \returns Number of neighbors found
+     */
+    int radiusSearch(const Matrix<ElementType>& query, Matrix<int>& indices, Matrix<DistanceType>& dists, float radius, const SearchParams& params)
+    {
+        return nnIndex_->radiusSearch(query, indices, dists, radius, params);
+    }
+
+    /**
+     * \brief Method that searches for nearest-neighbours
+     */
+    void findNeighbors(ResultSet<DistanceType>& result, const ElementType* vec, const SearchParams& searchParams)
+    {
+        nnIndex_->findNeighbors(result, vec, searchParams);
+    }
+
+    /**
+     * \brief Returns actual index
+     */
+    FLANN_DEPRECATED NNIndex<Distance>* getIndex()
+    {
+        return nnIndex_;
+    }
+
+    /**
+     * \brief Returns index parameters.
+     * \deprecated use getParameters() instead.
+     */
+    FLANN_DEPRECATED  const IndexParams* getIndexParameters()
+    {
+        return &index_params_;
+    }
+
+private:
+    /** Pointer to actual index class */
+    NNIndex<Distance>* nnIndex_;
+    /** Indices if the index was loaded from a file */
+    bool loaded_;
+    /** Parameters passed to the index */
+    IndexParams index_params_;
 };
 
-
+/**
-template<typename T>
+ * Performs a hierarchical clustering of the points passed as argument and then takes a cut in the
-NNIndex<T>* load_saved_index(const Matrix<T>& dataset, const std::string& filename)
+ * the clustering tree to return a flat clustering.
+ * @param[in] points Points to be clustered
+ * @param centers The computed cluster centres. Matrix should be preallocated and centers.rows is the
+ *  number of clusters requested.
+ * @param params Clustering parameters (The same as for cvflann::KMeansIndex)
+ * @param d Distance to be used for clustering (eg: cvflann::L2)
+ * @return number of clusters computed (can be different than clusters.rows and is the highest number
+ * of the form (branching-1)*K+1 smaller than clusters.rows).
+ */
+template <typename Distance>
+int hierarchicalClustering(const Matrix<typename Distance::ElementType>& points, Matrix<typename Distance::ResultType>& centers,
+                           const KMeansIndexParams& params, Distance d = Distance())
 {
-	FILE* fin = fopen(filename.c_str(), "rb");
+    KMeansIndex<Distance> kmeans(points, params, d);
-	if (fin==NULL) {
+    kmeans.buildIndex();
-		return NULL;
-	}
-	IndexHeader header = load_header(fin);
-	if (header.data_type!=Datatype<T>::type()) {
-		throw FLANNException("Datatype of saved index is different than of the one to be created.");
-	}
-	if (size_t(header.rows)!=dataset.rows || size_t(header.cols)!=dataset.cols) {
-		throw FLANNException("The index saved belongs to a different dataset");
-	}
-
-	IndexParams* params = ParamsFactory_instance().create(header.index_type);
-	NNIndex<T>* nnIndex = create_index_by_type(dataset, *params);
-	nnIndex->loadIndex(fin);
-	fclose(fin);
-
-	return nnIndex;
-}
-
-
-template<typename T>
-Index<T>::Index(const Matrix<T>& dataset, const IndexParams& params)
-{
-	flann_algorithm_t index_type = params.getIndexType();
-    built = false;
-
-	if (index_type==FLANN_INDEX_SAVED) {
-		nnIndex = load_saved_index(dataset, ((const SavedIndexParams&)params).filename);
-        built = true;
-	}
-	else {
-		nnIndex = create_index_by_type(dataset, params);
-	}
-}
-
-template<typename T>
-Index<T>::~Index()
-{
-	delete nnIndex;
-}
-
-template<typename T>
-void Index<T>::buildIndex()
-{
-	if (!built)	{
-		nnIndex->buildIndex();
-		built = true;
-	}
-}
-
-template<typename T>
-void Index<T>::knnSearch(const Matrix<T>& queries, Matrix<int>& indices, Matrix<float>& dists, int knn, const SearchParams& searchParams)
-{
-    if (!built) {
-        throw FLANNException("You must build the index before searching.");
-    }
-	assert(queries.cols==nnIndex->veclen());
-	assert(indices.rows>=queries.rows);
-	assert(dists.rows>=queries.rows);
-	assert(int(indices.cols)>=knn);
-	assert(int(dists.cols)>=knn);
-
-    KNNResultSet<T> resultSet(knn);
-
-    for (size_t i = 0; i < queries.rows; i++) {
-        T* target = queries[i];
-        resultSet.init(target, (int)queries.cols);
-
-        nnIndex->findNeighbors(resultSet, target, searchParams);
-
-        int* neighbors = resultSet.getNeighbors();
-        float* distances = resultSet.getDistances();
-        memcpy(indices[i], neighbors, knn*sizeof(int));
-        memcpy(dists[i], distances, knn*sizeof(float));
-    }
-}
-
-template<typename T>
-int Index<T>::radiusSearch(const Matrix<T>& query, Matrix<int>& indices, Matrix<float>& dists, float radius, const SearchParams& searchParams)
-{
-    if (!built) {
-        throw FLANNException("You must build the index before searching.");
-    }
-	if (query.rows!=1) {
-	    fprintf(stderr, "I can only search one feature at a time for range search\n");
-		return -1;
-	}
-	assert(query.cols==nnIndex->veclen());
-
-	RadiusResultSet<T> resultSet(radius);
-	resultSet.init(query.data, (int)query.cols);
-	nnIndex->findNeighbors(resultSet,query.data,searchParams);
-
-	// TODO: optimise here
-	int* neighbors = resultSet.getNeighbors();
-	float* distances = resultSet.getDistances();
-	size_t count_nn = std::min(resultSet.size(), indices.cols);
-
-	assert (dists.cols>=count_nn);
-
-	for (size_t i=0;i<count_nn;++i) {
-		indices[0][i] = neighbors[i];
-		dists[0][i] = distances[i];
-	}
-
-	return (int)count_nn;
-}
-
-
-template<typename T>
-void Index<T>::save(std::string filename)
-{
-	FILE* fout = fopen(filename.c_str(), "wb");
-	if (fout==NULL) {
-		throw FLANNException("Cannot open file");
-	}
-	save_header(fout, *nnIndex);
-	nnIndex->saveIndex(fout);
-	fclose(fout);
-}
-
-
-template<typename T>
-int Index<T>::size() const
-{
-	return nnIndex->size();
-}
-
-template<typename T>
-int Index<T>::veclen() const
-{
-	return nnIndex->veclen();
-}
-
-
-template <typename ELEM_TYPE, typename DIST_TYPE>
-int hierarchicalClustering(const Matrix<ELEM_TYPE>& features, Matrix<DIST_TYPE>& centers, const KMeansIndexParams& params)
-{
-    KMeansIndex<ELEM_TYPE, DIST_TYPE> kmeans(features, params);
-	kmeans.buildIndex();
 
     int clusterNum = kmeans.getClusterCenters(centers);
-	return clusterNum;
+    return clusterNum;
 }
 
-} // namespace cvflann
+}
-#endif /* _OPENCV_FLANN_BASE_HPP_ */
+#endif /* FLANN_BASE_HPP_ */

modules/flann/include/opencv2/flann/general.h

@@ -28,119 +28,25 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_GENERAL_H_
+#ifndef OPENCV_FLANN_GENERAL_H_
-#define _OPENCV_GENERAL_H_
+#define OPENCV_FLANN_GENERAL_H_
-
-#ifdef __cplusplus
 
+#include "defines.h"
 #include <stdexcept>
 #include <cassert>
-#include "opencv2/flann/object_factory.h"
-#include "opencv2/flann/logger.h"
 
-namespace cvflann {
+namespace cvflann
-
-#undef ARRAY_LEN
-#define ARRAY_LEN(a) (sizeof(a)/sizeof(a[0]))
-
-/* Nearest neighbour index algorithms */
-enum flann_algorithm_t {
-	FLANN_INDEX_LINEAR = 0,
-	FLANN_INDEX_KDTREE = 1,
-	FLANN_INDEX_KMEANS = 2,
-	FLANN_INDEX_COMPOSITE = 3,
-	FLANN_INDEX_SAVED = 254,
-	FLANN_INDEX_AUTOTUNED = 255
-};
-
-enum flann_centers_init_t {
-	FLANN_CENTERS_RANDOM = 0,
-	FLANN_CENTERS_GONZALES = 1,
-	FLANN_CENTERS_KMEANSPP = 2
-};
-
-
-enum flann_distance_t {
-	FLANN_DIST_EUCLIDEAN = 1,
-	FLANN_DIST_L2 = 1,
-	FLANN_DIST_MANHATTAN = 2,
-	FLANN_DIST_L1 = 2,
-	FLANN_DIST_MINKOWSKI = 3,
-	FLANN_DIST_MAX       = 4,
-	FLANN_DIST_HIST_INTERSECT = 5,
-	FLANN_DIST_HELLINGER = 6,
-	FLANN_DIST_CHI_SQUARE = 7,
-	FLANN_DIST_CS         = 7,
-	FLANN_DIST_KULLBACK_LEIBLER        = 8,
-	FLANN_DIST_KL        = 8
-};
-
-enum flann_datatype_t {
-	FLANN_INT8 = 0,
-	FLANN_INT16 = 1,
-	FLANN_INT32 = 2,
-	FLANN_INT64 = 3,
-	FLANN_UINT8 = 4,
-	FLANN_UINT16 = 5,
-	FLANN_UINT32 = 6,
-	FLANN_UINT64 = 7,
-	FLANN_FLOAT32 = 8,
-	FLANN_FLOAT64 = 9
-};
-
-template <typename ELEM_TYPE>
-struct DistType
 {
-	typedef ELEM_TYPE type;
-};
 
-template <>
+class FLANNException : public std::runtime_error
-struct DistType<unsigned char>
 {
-	typedef float type;
-};
-
-template <>
-struct DistType<int>
-{
-	typedef float type;
-};
-
-
-class FLANNException : public std::runtime_error {
- public:
-   FLANNException(const char* message) : std::runtime_error(message) { }
-
-   FLANNException(const std::string& message) : std::runtime_error(message) { }
- };
-
-
-struct CV_EXPORTS IndexParams {
-protected:
-	IndexParams(flann_algorithm_t algorithm_) : algorithm(algorithm_) {};
-	
 public:
-	virtual ~IndexParams() {}
+    FLANNException(const char* message) : std::runtime_error(message) { }
-	virtual flann_algorithm_t getIndexType() const { return algorithm; }
 
-	virtual void print() const = 0;
+    FLANNException(const std::string& message) : std::runtime_error(message) { }
-
-	flann_algorithm_t algorithm;
 };
 
+}
 
-typedef ObjectFactory<IndexParams, flann_algorithm_t> ParamsFactory;
-CV_EXPORTS ParamsFactory& ParamsFactory_instance();
 
-struct CV_EXPORTS SearchParams {
+#endif  /* OPENCV_FLANN_GENERAL_H_ */
-	SearchParams(int checks_ = 32) :
-		checks(checks_) {};
-
-	int checks;
-};
-
-} // namespace cvflann
-
-#endif
-
-#endif  /* _OPENCV_GENERAL_H_ */

modules/flann/include/opencv2/flann/ground_truth.h

@@ -28,39 +28,41 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_GROUND_TRUTH_H_
+#ifndef OPENCV_FLANN_GROUND_TRUTH_H_
-#define _OPENCV_GROUND_TRUTH_H_
+#define OPENCV_FLANN_GROUND_TRUTH_H_
+
+#include "dist.h"
+#include "matrix.h"
 
-#include "opencv2/flann/dist.h"
-#include "opencv2/flann/matrix.h"
 
 namespace cvflann
 {
 
-template <typename T>
+template <typename Distance>
-void find_nearest(const Matrix<T>& dataset, T* query, int* matches, int nn, int skip = 0)
+void find_nearest(const Matrix<typename Distance::ElementType>& dataset, typename Distance::ElementType* query, int* matches, int nn,
+                  int skip = 0, Distance distance = Distance())
 {
+    typedef typename Distance::ElementType ElementType;
+    typedef typename Distance::ResultType DistanceType;
     int n = nn + skip;
 
-    T* query_end = query + dataset.cols;
+    int* match = new int[n];
+    DistanceType* dists = new DistanceType[n];
 
-    long* match = new long[n];
+    dists[0] = distance(dataset[0], query, dataset.cols);
-    T* dists = new T[n];
-
-    dists[0] = (float)flann_dist(query, query_end, dataset[0]);
     match[0] = 0;
     int dcnt = 1;
 
-    for (size_t i=1;i<dataset.rows;++i) {
+    for (size_t i=1; i<dataset.rows; ++i) {
-        T tmp = (T)flann_dist(query, query_end, dataset[i]);
+        DistanceType tmp = distance(dataset[i], query, dataset.cols);
 
         if (dcnt<n) {
-            match[dcnt] = (long)i;
+            match[dcnt] = i;
             dists[dcnt++] = tmp;
         }
         else if (tmp < dists[dcnt-1]) {
             dists[dcnt-1] = tmp;
-            match[dcnt-1] = (long)i;
+            match[dcnt-1] = i;
         }
 
         int j = dcnt-1;
@@ -72,7 +74,7 @@ void find_nearest(const Matrix<T>& dataset, T* query, int* matches, int nn, int
         }
     }
 
-    for (int i=0;i<nn;++i) {
+    for (int i=0; i<nn; ++i) {
         matches[i] = match[i+skip];
     }
 
@@ -81,15 +83,16 @@ void find_nearest(const Matrix<T>& dataset, T* query, int* matches, int nn, int
 }
 
 
-template <typename T>
+template <typename Distance>
-void compute_ground_truth(const Matrix<T>& dataset, const Matrix<T>& testset, Matrix<int>& matches, int skip=0)
+void compute_ground_truth(const Matrix<typename Distance::ElementType>& dataset, const Matrix<typename Distance::ElementType>& testset, Matrix<int>& matches,
+                          int skip=0, Distance d = Distance())
 {
-    for (size_t i=0;i<testset.rows;++i) {
+    for (size_t i=0; i<testset.rows; ++i) {
-        find_nearest(dataset, testset[i], matches[i], (int)matches.cols, skip);
+        find_nearest<Distance>(dataset, testset[i], matches[i], (int)matches.cols, skip, d);
     }
 }
 
 
-} // namespace cvflann
+}
 
-#endif //_OPENCV_GROUND_TRUTH_H_
+#endif //OPENCV_FLANN_GROUND_TRUTH_H_

modules/flann/include/opencv2/flann/hdf5.h

@@ -27,137 +27,207 @@
  *************************************************************************/
 
 
-#ifndef _OPENCV_HDF5_H_
+#ifndef OPENCV_FLANN_HDF5_H_
-#define _OPENCV_HDF5_H_
+#define OPENCV_FLANN_HDF5_H_
 
-#include <H5Cpp.h>
+#include <hdf5.h>
 
-#include "opencv2/flann/matrix.h"
+#include "matrix.h"
 
 
+namespace cvflann
+{
 
-#ifndef H5_NO_NAMESPACE
+namespace
-    using namespace H5;
+{
+
+template<typename T>
+hid_t get_hdf5_type()
+{
+    throw FLANNException("Unsupported type for IO operations");
+}
+
+template<>
+hid_t get_hdf5_type<char>() { return H5T_NATIVE_CHAR; }
+template<>
+hid_t get_hdf5_type<unsigned char>() { return H5T_NATIVE_UCHAR; }
+template<>
+hid_t get_hdf5_type<short int>() { return H5T_NATIVE_SHORT; }
+template<>
+hid_t get_hdf5_type<unsigned short int>() { return H5T_NATIVE_USHORT; }
+template<>
+hid_t get_hdf5_type<int>() { return H5T_NATIVE_INT; }
+template<>
+hid_t get_hdf5_type<unsigned int>() { return H5T_NATIVE_UINT; }
+template<>
+hid_t get_hdf5_type<long>() { return H5T_NATIVE_LONG; }
+template<>
+hid_t get_hdf5_type<unsigned long>() { return H5T_NATIVE_ULONG; }
+template<>
+hid_t get_hdf5_type<float>() { return H5T_NATIVE_FLOAT; }
+template<>
+hid_t get_hdf5_type<double>() { return H5T_NATIVE_DOUBLE; }
+template<>
+hid_t get_hdf5_type<long double>() { return H5T_NATIVE_LDOUBLE; }
+}
+
+
+#define CHECK_ERROR(x,y) if ((x)<0) throw FLANNException((y));
+
+template<typename T>
+void save_to_file(const cvflann::Matrix<T>& dataset, const std::string& filename, const std::string& name)
+{
+
+#if H5Eset_auto_vers == 2
+    H5Eset_auto( H5E_DEFAULT, NULL, NULL );
+#else
+    H5Eset_auto( NULL, NULL );
 #endif
 
-namespace cvflann 
+    herr_t status;
-{
+    hid_t file_id;
+    file_id = H5Fopen(filename.c_str(), H5F_ACC_RDWR, H5P_DEFAULT);
+    if (file_id < 0) {
+        file_id = H5Fcreate(filename.c_str(), H5F_ACC_EXCL, H5P_DEFAULT, H5P_DEFAULT);
+    }
+    CHECK_ERROR(file_id,"Error creating hdf5 file.");
 
+    hsize_t     dimsf[2];              // dataset dimensions
+    dimsf[0] = dataset.rows;
+    dimsf[1] = dataset.cols;
 
-namespace {
+    hid_t space_id = H5Screate_simple(2, dimsf, NULL);
+    hid_t memspace_id = H5Screate_simple(2, dimsf, NULL);
 
-template<typename T>
+    hid_t dataset_id;
-PredType get_hdf5_type()
+#if H5Dcreate_vers == 2
-{
+    dataset_id = H5Dcreate2(file_id, name.c_str(), get_hdf5_type<T>(), space_id, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
-	throw FLANNException("Unsupported type for IO operations");
+#else
-}
+    dataset_id = H5Dcreate(file_id, name.c_str(), get_hdf5_type<T>(), space_id, H5P_DEFAULT);
+#endif
 
-template<> PredType get_hdf5_type<char>() { return PredType::NATIVE_CHAR; }
+    if (dataset_id<0) {
-template<> PredType get_hdf5_type<unsigned char>() { return PredType::NATIVE_UCHAR; }
+#if H5Dopen_vers == 2
-template<> PredType get_hdf5_type<short int>() { return PredType::NATIVE_SHORT; }
+        dataset_id = H5Dopen2(file_id, name.c_str(), H5P_DEFAULT);
-template<> PredType get_hdf5_type<unsigned short int>() { return PredType::NATIVE_USHORT; }
+#else
-template<> PredType get_hdf5_type<int>() { return PredType::NATIVE_INT; }
+        dataset_id = H5Dopen(file_id, name.c_str());
-template<> PredType get_hdf5_type<unsigned int>() { return PredType::NATIVE_UINT; }
+#endif
-template<> PredType get_hdf5_type<long>() { return PredType::NATIVE_LONG; }
+    }
-template<> PredType get_hdf5_type<unsigned long>() { return PredType::NATIVE_ULONG; }
+    CHECK_ERROR(dataset_id,"Error creating or opening dataset in file.");
-template<> PredType get_hdf5_type<float>() { return PredType::NATIVE_FLOAT; }
+
-template<> PredType get_hdf5_type<double>() { return PredType::NATIVE_DOUBLE; }
+    status = H5Dwrite(dataset_id, get_hdf5_type<T>(), memspace_id, space_id, H5P_DEFAULT, dataset.data );
-template<> PredType get_hdf5_type<long double>() { return PredType::NATIVE_LDOUBLE; }
+    CHECK_ERROR(status, "Error writing to dataset");
+
+    H5Sclose(memspace_id);
+    H5Sclose(space_id);
+    H5Dclose(dataset_id);
+    H5Fclose(file_id);
 
 }
 
 
 template<typename T>
-void save_to_file(const cvflann::Matrix<T>& flann_dataset, const std::string& filename, const std::string& name)
+void load_from_file(cvflann::Matrix<T>& dataset, const std::string& filename, const std::string& name)
 {
-	// Try block to detect exceptions raised by any of the calls inside it
+    herr_t status;
-	try
+    hid_t file_id = H5Fopen(filename.c_str(), H5F_ACC_RDWR, H5P_DEFAULT);
-	{
+    CHECK_ERROR(file_id,"Error opening hdf5 file.");
-		/*
-		 * Turn off the auto-printing when failure occurs so that we can
-		 * handle the errors appropriately
-		 */
-		Exception::dontPrint();
 
-		/*
+    hid_t dataset_id;
-		 * Create a new file using H5F_ACC_TRUNC access,
+#if H5Dopen_vers == 2
-		 * default file creation properties, and default file
+    dataset_id = H5Dopen2(file_id, name.c_str(), H5P_DEFAULT);
-		 * access properties.
+#else
-		 */
+    dataset_id = H5Dopen(file_id, name.c_str());
-		H5File file( filename, H5F_ACC_TRUNC );
+#endif
+    CHECK_ERROR(dataset_id,"Error opening dataset in file.");
 
-		/*
+    hid_t space_id = H5Dget_space(dataset_id);
-		 * Define the size of the array and create the data space for fixed
-		 * size dataset.
-		 */
-		hsize_t     dimsf[2];              // dataset dimensions
-		dimsf[0] = flann_dataset.rows;
-		dimsf[1] = flann_dataset.cols;
-		DataSpace dataspace( 2, dimsf );
 
-		/*
+    hsize_t dims_out[2];
-		 * Create a new dataset within the file using defined dataspace and
+    H5Sget_simple_extent_dims(space_id, dims_out, NULL);
-		 * datatype and default dataset creation properties.
-		 */
-		DataSet dataset = file.createDataSet( name, get_hdf5_type<T>(), dataspace );
 
-		/*
+    dataset = cvflann::Matrix<T>(new T[dims_out[0]*dims_out[1]], dims_out[0], dims_out[1]);
-		 * Write the data to the dataset using default memory space, file
+
-		 * space, and transfer properties.
+    status = H5Dread(dataset_id, get_hdf5_type<T>(), H5S_ALL, H5S_ALL, H5P_DEFAULT, dataset[0]);
-		 */
+    CHECK_ERROR(status, "Error reading dataset");
-		dataset.write( flann_dataset.data, get_hdf5_type<T>() );
+
-	}  // end of try block
+    H5Sclose(space_id);
-	catch( H5::Exception& error )
+    H5Dclose(dataset_id);
-	{
+    H5Fclose(file_id);
-		error.printError();
-		throw FLANNException(error.getDetailMsg());
-	}
 }
 
 
+#ifdef HAVE_MPI
+
+namespace mpi
+{
+/**
+ * Loads a the hyperslice corresponding to this processor from a hdf5 file.
+ * @param flann_dataset Dataset where the data is loaded
+ * @param filename HDF5 file name
+ * @param name Name of dataset inside file
+ */
 template<typename T>
-void load_from_file(cvflann::Matrix<T>& flann_dataset, const std::string& filename, const std::string& name)
+void load_from_file(cvflann::Matrix<T>& dataset, const std::string& filename, const std::string& name)
 {
-	try
+    MPI_Comm comm  = MPI_COMM_WORLD;
-	{
+    MPI_Info info  = MPI_INFO_NULL;
-		Exception::dontPrint();
 
-		H5File file( filename, H5F_ACC_RDONLY );
+    int mpi_size, mpi_rank;
-		DataSet dataset = file.openDataSet( name );
+    MPI_Comm_size(comm, &mpi_size);
+    MPI_Comm_rank(comm, &mpi_rank);
 
-		/*
+    herr_t status;
-		 * Check the type used by the dataset matches
-		 */
-		if ( !(dataset.getDataType()==get_hdf5_type<T>())) {
-			throw FLANNException("Dataset matrix type does not match the type to be read.");
-		}
 
-		/*
+    hid_t plist_id = H5Pcreate(H5P_FILE_ACCESS);
-		 * Get dataspace of the dataset.
+    H5Pset_fapl_mpio(plist_id, comm, info);
-		 */
+    hid_t file_id = H5Fopen(filename.c_str(), H5F_ACC_RDWR, plist_id);
-		DataSpace dataspace = dataset.getSpace();
+    CHECK_ERROR(file_id,"Error opening hdf5 file.");
+    H5Pclose(plist_id);
+    hid_t dataset_id;
+#if H5Dopen_vers == 2
+    dataset_id = H5Dopen2(file_id, name.c_str(), H5P_DEFAULT);
+#else
+    dataset_id = H5Dopen(file_id, name.c_str());
+#endif
+    CHECK_ERROR(dataset_id,"Error opening dataset in file.");
 
-		/*
+    hid_t space_id = H5Dget_space(dataset_id);
-		 * Get the dimension size of each dimension in the dataspace and
+    hsize_t dims[2];
-		 * display them.
+    H5Sget_simple_extent_dims(space_id, dims, NULL);
-		 */
-		hsize_t dims_out[2];
-		dataspace.getSimpleExtentDims( dims_out, NULL);
-		
-		flann_dataset.rows = dims_out[0];
-		flann_dataset.cols = dims_out[1];
-		flann_dataset.data = new T[flann_dataset.rows*flann_dataset.cols];
 
-		dataset.read( flann_dataset.data, get_hdf5_type<T>() );
+    hsize_t count[2];
-	}  // end of try block
+    hsize_t offset[2];
-	catch( H5::Exception &error )
+
-	{
+    hsize_t item_cnt = dims[0]/mpi_size+(dims[0]%mpi_size==0 ? 0 : 1);
-		error.printError();
+    hsize_t cnt = (mpi_rank<mpi_size-1 ? item_cnt : dims[0]-item_cnt*(mpi_size-1));
-		throw FLANNException(error.getDetailMsg());
+
-	}
+    count[0] = cnt;
+    count[1] = dims[1];
+    offset[0] = mpi_rank*item_cnt;
+    offset[1] = 0;
+
+    hid_t memspace_id = H5Screate_simple(2,count,NULL);
+
+    H5Sselect_hyperslab(space_id, H5S_SELECT_SET, offset, NULL, count, NULL);
+
+    dataset.rows = count[0];
+    dataset.cols = count[1];
+    dataset.data = new T[dataset.rows*dataset.cols];
+
+    plist_id = H5Pcreate(H5P_DATASET_XFER);
+    H5Pset_dxpl_mpio(plist_id, H5FD_MPIO_COLLECTIVE);
+    status = H5Dread(dataset_id, get_hdf5_type<T>(), memspace_id, space_id, plist_id, dataset.data);
+    CHECK_ERROR(status, "Error reading dataset");
+
+    H5Pclose(plist_id);
+    H5Sclose(space_id);
+    H5Sclose(memspace_id);
+    H5Dclose(dataset_id);
+    H5Fclose(file_id);
 }
+}
+#endif // HAVE_MPI
+} // namespace cvflann::mpi
 
-
+#endif /* OPENCV_FLANN_HDF5_H_ */
-} // namespace cvflann
-
-#endif /* _OPENCV_HDF5_H_ */

modules/flann/include/opencv2/flann/heap.h

@@ -28,11 +28,11 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_HEAP_H_
+#ifndef OPENCV_FLANN_HEAP_H_
-#define _OPENCV_HEAP_H_
+#define OPENCV_FLANN_HEAP_H_
-
 
 #include <algorithm>
+#include <vector>
 
 namespace cvflann
 {
@@ -43,166 +43,123 @@ namespace cvflann
  * The priority queue is implemented with a heap.  A heap is a complete
  * (full) binary tree in which each parent is less than both of its
  * children, but the order of the children is unspecified.
- * Note that a heap uses 1-based indexing to allow for power-of-2
- * location of parents and children.  We ignore element 0 of Heap array.
  */
 template <typename T>
-class Heap {
+class Heap
+{
 
-	/**
+    /**
-	* Storage array for the heap.
+     * Storage array for the heap.
-	* Type T must be comparable.
+     * Type T must be comparable.
-	*/
+     */
-	T* heap;
+    std::vector<T> heap;
     int length;
 
-	/**
+    /**
-	 * Number of element in the heap
+     * Number of element in the heap
-	 */
+     */
-	int count;
+    int count;
 
 
 
 public:
-	/**
+    /**
-	 * Constructor.
+     * Constructor.
-	 *
+     *
-	 * Params:
+     * Params:
-	 *     size = heap size
+     *     size = heap size
-	 */
+     */
 
-	Heap(int size)
+    Heap(int size)
-	{
+    {
-        length = size+1;
+        length = size;
-		heap = new T[length];  // heap uses 1-based indexing
+        heap.reserve(length);
-		count = 0;
+        count = 0;
-	}
+    }
 
+    /**
+     *
+     * Returns: heap size
+     */
+    int size()
+    {
+        return count;
+    }
 
-	/**
+    /**
-	 * Destructor.
+     * Tests if the heap is empty
-	 *
+     *
-	 */
+     * Returns: true is heap empty, false otherwise
-	~Heap()
+     */
-	{
+    bool empty()
-		delete[] heap;
+    {
-	}
+        return size()==0;
+    }
 
-	/**
+    /**
-	 *
+     * Clears the heap.
-	 * Returns: heap size
+     */
-	 */
+    void clear()
-	int size()
+    {
-	{
+        heap.clear();
-		return count;
+        count = 0;
-	}
+    }
 
-	/**
+    struct CompareT
-	 * Tests if the heap is empty
+    {
-	 *
+        bool operator()(const T& t_1, const T& t_2) const
-	 * Returns: true is heap empty, false otherwise
+        {
-	 */
+            return t_2 < t_1;
-	bool empty()
+        }
-	{
+    };
-		return size()==0;
-	}
 
-	/**
+    /**
-	 * Clears the heap.
+     * Insert a new element in the heap.
-	 */
+     *
-	void clear()
+     * We select the next empty leaf node, and then keep moving any larger
-	{
+     * parents down until the right location is found to store this element.
-		count = 0;
+     *
-	}
+     * Params:
+     *     value = the new element to be inserted in the heap
+     */
+    void insert(T value)
+    {
+        /* If heap is full, then return without adding this element. */
+        if (count == length) {
+            return;
+        }
 
-
+        heap.push_back(value);
-	/**
+        static CompareT compareT;
-	 * Insert a new element in the heap.
+        std::push_heap(heap.begin(), heap.end(), compareT);
-	 *
+        ++count;
-	 * We select the next empty leaf node, and then keep moving any larger
+    }
-	 * parents down until the right location is found to store this element.
-	 *
-	 * Params:
-	 *     value = the new element to be inserted in the heap
-	 */
-	void insert(T value)
-	{
-		/* If heap is full, then return without adding this element. */
-		if (count == length-1) {
-			return;
-		}
-
-		int loc = ++(count);   /* Remember 1-based indexing. */
-
-		/* Keep moving parents down until a place is found for this node. */
-		int par = loc / 2;                 /* Location of parent. */
-		while (par > 0  && value < heap[par]) {
-			heap[loc] = heap[par];     /* Move parent down to loc. */
-			loc = par;
-			par = loc / 2;
-		}
-		/* Insert the element at the determined location. */
-		heap[loc] = value;
-	}
 
 
 
-	/**
+    /**
- 	 * Returns the node of minimum value from the heap (top of the heap).
+     * Returns the node of minimum value from the heap (top of the heap).
-	 *
+     *
-	 * Params:
+     * Params:
-	 *     value = out parameter used to return the min element
+     *     value = out parameter used to return the min element
-	 * Returns: false if heap empty
+     * Returns: false if heap empty
-	 */
+     */
-	bool popMin(T& value)
+    bool popMin(T& value)
-	{
+    {
-		if (count == 0) {
+        if (count == 0) {
- 			return false;
+            return false;
-		}
+        }
 
-		/* Switch first node with last. */
+        value = heap[0];
-        std::swap(heap[1],heap[count]);
+        static CompareT compareT;
-
+        std::pop_heap(heap.begin(), heap.end(), compareT);
-		count -= 1;
+        heap.pop_back();
-		heapify(1);      /* Move new node 1 to right position. */
+        --count;
-
-		value = heap[count + 1];
-		return true;  /* Return old last node. */
-	}
-
-
-	/**
-	 * Reorganizes the heap (a parent is smaller than its children)
-	 * starting with a node.
-	 *
-	 * Params:
-	 *     parent = node form which to start heap reorganization.
-	 */
-	void heapify(int parent)
-	{
-		int minloc = parent;
-
-		/* Check the left child */
-		int left = 2 * parent;
-		if (left <= count && heap[left] < heap[parent]) {
-			minloc = left;
-		}
-
-		/* Check the right child */
-		int right = left + 1;
-		if (right <= count && heap[right] < heap[minloc]) {
-			minloc = right;
-		}
-
-		/* If a child was smaller, than swap parent with it and Heapify. */
-		if (minloc != parent) {
-            std::swap(heap[parent],heap[minloc]);
-			heapify(minloc);
-		}
-	}
 
+        return true;  /* Return old last node. */
+    }
 };
 
-} // namespace cvflann
+}
 
-#endif //_OPENCV_HEAP_H_
+#endif //OPENCV_FLANN_HEAP_H_

modules/flann/include/opencv2/flann/hierarchical_clustering_index.h

@@ -0,0 +1,717 @@
+/***********************************************************************
+ * Software License Agreement (BSD License)
+ *
+ * Copyright 2008-2011  Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
+ * Copyright 2008-2011  David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
+ *
+ * THE BSD LICENSE
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *************************************************************************/
+
+#ifndef OPENCV_FLANN_HIERARCHICAL_CLUSTERING_INDEX_H_
+#define OPENCV_FLANN_HIERARCHICAL_CLUSTERING_INDEX_H_
+
+#include <algorithm>
+#include <string>
+#include <map>
+#include <cassert>
+#include <limits>
+#include <cmath>
+
+#include "general.h"
+#include "nn_index.h"
+#include "dist.h"
+#include "matrix.h"
+#include "result_set.h"
+#include "heap.h"
+#include "allocator.h"
+#include "random.h"
+#include "saving.h"
+
+
+namespace cvflann
+{
+
+struct HierarchicalClusteringIndexParams : public IndexParams
+{
+    HierarchicalClusteringIndexParams(int branching = 32,
+                                      flann_centers_init_t centers_init = FLANN_CENTERS_RANDOM,
+                                      int trees = 4, int leaf_size = 100)
+    {
+        (*this)["algorithm"] = FLANN_INDEX_HIERARCHICAL;
+        // The branching factor used in the hierarchical clustering
+        (*this)["branching"] = branching;
+        // Algorithm used for picking the initial cluster centers
+        (*this)["centers_init"] = centers_init;
+        // number of parallel trees to build
+        (*this)["trees"] = trees;
+        // maximum leaf size
+        (*this)["leaf_size"] = leaf_size;
+    }
+};
+
+
+/**
+ * Hierarchical index
+ *
+ * Contains a tree constructed through a hierarchical clustering
+ * and other information for indexing a set of points for nearest-neighbour matching.
+ */
+template <typename Distance>
+class HierarchicalClusteringIndex : public NNIndex<Distance>
+{
+public:
+    typedef typename Distance::ElementType ElementType;
+    typedef typename Distance::ResultType DistanceType;
+
+private:
+
+
+    typedef void (HierarchicalClusteringIndex::* centersAlgFunction)(int, int*, int, int*, int&);
+
+    /**
+     * The function used for choosing the cluster centers.
+     */
+    centersAlgFunction chooseCenters;
+
+
+
+    /**
+     * Chooses the initial centers in the k-means clustering in a random manner.
+     *
+     * Params:
+     *     k = number of centers
+     *     vecs = the dataset of points
+     *     indices = indices in the dataset
+     *     indices_length = length of indices vector
+     *
+     */
+    void chooseCentersRandom(int k, int* indices, int indices_length, int* centers, int& centers_length)
+    {
+        UniqueRandom r(indices_length);
+
+        int index;
+        for (index=0; index<k; ++index) {
+            bool duplicate = true;
+            int rnd;
+            while (duplicate) {
+                duplicate = false;
+                rnd = r.next();
+                if (rnd<0) {
+                    centers_length = index;
+                    return;
+                }
+
+                centers[index] = indices[rnd];
+
+                for (int j=0; j<index; ++j) {
+                    DistanceType sq = distance(dataset[centers[index]], dataset[centers[j]], dataset.cols);
+                    if (sq<1e-16) {
+                        duplicate = true;
+                    }
+                }
+            }
+        }
+
+        centers_length = index;
+    }
+
+
+    /**
+     * Chooses the initial centers in the k-means using Gonzales' algorithm
+     * so that the centers are spaced apart from each other.
+     *
+     * Params:
+     *     k = number of centers
+     *     vecs = the dataset of points
+     *     indices = indices in the dataset
+     * Returns:
+     */
+    void chooseCentersGonzales(int k, int* indices, int indices_length, int* centers, int& centers_length)
+    {
+        int n = indices_length;
+
+        int rnd = rand_int(n);
+        assert(rnd >=0 && rnd < n);
+
+        centers[0] = indices[rnd];
+
+        int index;
+        for (index=1; index<k; ++index) {
+
+            int best_index = -1;
+            DistanceType best_val = 0;
+            for (int j=0; j<n; ++j) {
+            	DistanceType dist = distance(dataset[centers[0]],dataset[indices[j]],dataset.cols);
+                for (int i=1; i<index; ++i) {
+                    DistanceType tmp_dist = distance(dataset[centers[i]],dataset[indices[j]],dataset.cols);
+                    if (tmp_dist<dist) {
+                        dist = tmp_dist;
+                    }
+                }
+                if (dist>best_val) {
+                    best_val = dist;
+                    best_index = j;
+                }
+            }
+            if (best_index!=-1) {
+                centers[index] = indices[best_index];
+            }
+            else {
+                break;
+            }
+        }
+        centers_length = index;
+    }
+
+
+    /**
+     * Chooses the initial centers in the k-means using the algorithm
+     * proposed in the KMeans++ paper:
+     * Arthur, David; Vassilvitskii, Sergei - k-means++: The Advantages of Careful Seeding
+     *
+     * Implementation of this function was converted from the one provided in Arthur's code.
+     *
+     * Params:
+     *     k = number of centers
+     *     vecs = the dataset of points
+     *     indices = indices in the dataset
+     * Returns:
+     */
+    void chooseCentersKMeanspp(int k, int* indices, int indices_length, int* centers, int& centers_length)
+    {
+        int n = indices_length;
+
+        double currentPot = 0;
+        DistanceType* closestDistSq = new DistanceType[n];
+
+        // Choose one random center and set the closestDistSq values
+        int index = rand_int(n);
+        assert(index >=0 && index < n);
+        centers[0] = indices[index];
+
+        for (int i = 0; i < n; i++) {
+            closestDistSq[i] = distance(dataset[indices[i]], dataset[indices[index]], dataset.cols);
+            currentPot += closestDistSq[i];
+        }
+
+
+        const int numLocalTries = 1;
+
+        // Choose each center
+        int centerCount;
+        for (centerCount = 1; centerCount < k; centerCount++) {
+
+            // Repeat several trials
+            double bestNewPot = -1;
+            int bestNewIndex = 0;
+            for (int localTrial = 0; localTrial < numLocalTries; localTrial++) {
+
+                // Choose our center - have to be slightly careful to return a valid answer even accounting
+                // for possible rounding errors
+                double randVal = rand_double(currentPot);
+                for (index = 0; index < n-1; index++) {
+                    if (randVal <= closestDistSq[index]) break;
+                    else randVal -= closestDistSq[index];
+                }
+
+                // Compute the new potential
+                double newPot = 0;
+                for (int i = 0; i < n; i++) newPot += std::min( distance(dataset[indices[i]], dataset[indices[index]], dataset.cols), closestDistSq[i] );
+
+                // Store the best result
+                if ((bestNewPot < 0)||(newPot < bestNewPot)) {
+                    bestNewPot = newPot;
+                    bestNewIndex = index;
+                }
+            }
+
+            // Add the appropriate center
+            centers[centerCount] = indices[bestNewIndex];
+            currentPot = bestNewPot;
+            for (int i = 0; i < n; i++) closestDistSq[i] = std::min( distance(dataset[indices[i]], dataset[indices[bestNewIndex]], dataset.cols), closestDistSq[i] );
+        }
+
+        centers_length = centerCount;
+
+        delete[] closestDistSq;
+    }
+
+
+public:
+
+
+    /**
+     * Index constructor
+     *
+     * Params:
+     *          inputData = dataset with the input features
+     *          params = parameters passed to the hierarchical k-means algorithm
+     */
+    HierarchicalClusteringIndex(const Matrix<ElementType>& inputData, const IndexParams& index_params = HierarchicalClusteringIndexParams(),
+                                Distance d = Distance())
+        : dataset(inputData), params(index_params), root(NULL), indices(NULL), distance(d)
+    {
+        memoryCounter = 0;
+
+        size_ = dataset.rows;
+        veclen_ = dataset.cols;
+
+        branching_ = get_param(params,"branching",32);
+        centers_init_ = get_param(params,"centers_init", FLANN_CENTERS_RANDOM);
+        trees_ = get_param(params,"trees",4);
+        leaf_size_ = get_param(params,"leaf_size",100);
+
+        if (centers_init_==FLANN_CENTERS_RANDOM) {
+            chooseCenters = &HierarchicalClusteringIndex::chooseCentersRandom;
+        }
+        else if (centers_init_==FLANN_CENTERS_GONZALES) {
+            chooseCenters = &HierarchicalClusteringIndex::chooseCentersGonzales;
+        }
+        else if (centers_init_==FLANN_CENTERS_KMEANSPP) {
+            chooseCenters = &HierarchicalClusteringIndex::chooseCentersKMeanspp;
+        }
+        else {
+            throw FLANNException("Unknown algorithm for choosing initial centers.");
+        }
+
+        trees_ = get_param(params,"trees",4);
+        root = new NodePtr[trees_];
+        indices = new int*[trees_];
+    }
+
+    HierarchicalClusteringIndex(const HierarchicalClusteringIndex&);
+    HierarchicalClusteringIndex& operator=(const HierarchicalClusteringIndex&);
+
+    /**
+     * Index destructor.
+     *
+     * Release the memory used by the index.
+     */
+    virtual ~HierarchicalClusteringIndex()
+    {
+        if (indices!=NULL) {
+            delete[] indices;
+        }
+    }
+
+    /**
+     *  Returns size of index.
+     */
+    size_t size() const
+    {
+        return size_;
+    }
+
+    /**
+     * Returns the length of an index feature.
+     */
+    size_t veclen() const
+    {
+        return veclen_;
+    }
+
+
+    /**
+     * Computes the inde memory usage
+     * Returns: memory used by the index
+     */
+    int usedMemory() const
+    {
+        return pool.usedMemory+pool.wastedMemory+memoryCounter;
+    }
+
+    /**
+     * Builds the index
+     */
+    void buildIndex()
+    {
+        if (branching_<2) {
+            throw FLANNException("Branching factor must be at least 2");
+        }
+        for (int i=0; i<trees_; ++i) {
+            indices[i] = new int[size_];
+            for (size_t j=0; j<size_; ++j) {
+                indices[i][j] = j;
+            }
+            root[i] = pool.allocate<Node>();
+            computeClustering(root[i], indices[i], size_, branching_,0);
+        }
+    }
+
+
+    flann_algorithm_t getType() const
+    {
+        return FLANN_INDEX_HIERARCHICAL;
+    }
+
+
+    void saveIndex(FILE* stream)
+    {
+        save_value(stream, branching_);
+        save_value(stream, trees_);
+        save_value(stream, centers_init_);
+        save_value(stream, leaf_size_);
+        save_value(stream, memoryCounter);
+        for (int i=0; i<trees_; ++i) {
+            save_value(stream, *indices[i], size_);
+            save_tree(stream, root[i], i);
+        }
+
+    }
+
+
+    void loadIndex(FILE* stream)
+    {
+        load_value(stream, branching_);
+        load_value(stream, trees_);
+        load_value(stream, centers_init_);
+        load_value(stream, leaf_size_);
+        load_value(stream, memoryCounter);
+        indices = new int*[trees_];
+        root = new NodePtr[trees_];
+        for (int i=0; i<trees_; ++i) {
+            indices[i] = new int[size_];
+            load_value(stream, *indices[i], size_);
+            load_tree(stream, root[i], i);
+        }
+
+        params["algorithm"] = getType();
+        params["branching"] = branching_;
+        params["trees"] = trees_;
+        params["centers_init"] = centers_init_;
+        params["leaf_size"] = leaf_size_;
+    }
+
+
+    /**
+     * Find set of nearest neighbors to vec. Their indices are stored inside
+     * the result object.
+     *
+     * Params:
+     *     result = the result object in which the indices of the nearest-neighbors are stored
+     *     vec = the vector for which to search the nearest neighbors
+     *     searchParams = parameters that influence the search algorithm (checks)
+     */
+    void findNeighbors(ResultSet<DistanceType>& result, const ElementType* vec, const SearchParams& searchParams)
+    {
+
+        int maxChecks = get_param(searchParams,"checks",32);
+
+        // Priority queue storing intermediate branches in the best-bin-first search
+        Heap<BranchSt>* heap = new Heap<BranchSt>(size_);
+
+        std::vector<bool> checked(size_,false);
+        int checks = 0;
+        for (int i=0; i<trees_; ++i) {
+            findNN(root[i], result, vec, checks, maxChecks, heap, checked);
+        }
+
+        BranchSt branch;
+        while (heap->popMin(branch) && (checks<maxChecks || !result.full())) {
+            NodePtr node = branch.node;
+            findNN(node, result, vec, checks, maxChecks, heap, checked);
+        }
+        assert(result.full());
+
+        delete heap;
+
+    }
+
+    IndexParams getParameters() const
+    {
+        return params;
+    }
+
+
+private:
+
+    /**
+     * Struture representing a node in the hierarchical k-means tree.
+     */
+    struct Node
+    {
+        /**
+         * The cluster center index
+         */
+        int pivot;
+        /**
+         * The cluster size (number of points in the cluster)
+         */
+        int size;
+        /**
+         * Child nodes (only for non-terminal nodes)
+         */
+        Node** childs;
+        /**
+         * Node points (only for terminal nodes)
+         */
+        int* indices;
+        /**
+         * Level
+         */
+        int level;
+    };
+    typedef Node* NodePtr;
+
+
+
+    /**
+     * Alias definition for a nicer syntax.
+     */
+    typedef BranchStruct<NodePtr, DistanceType> BranchSt;
+
+
+
+    void save_tree(FILE* stream, NodePtr node, int num)
+    {
+        save_value(stream, *node);
+        if (node->childs==NULL) {
+            int indices_offset = node->indices - indices[num];
+            save_value(stream, indices_offset);
+        }
+        else {
+            for(int i=0; i<branching_; ++i) {
+                save_tree(stream, node->childs[i], num);
+            }
+        }
+    }
+
+
+    void load_tree(FILE* stream, NodePtr& node, int num)
+    {
+        node = pool.allocate<Node>();
+        load_value(stream, *node);
+        if (node->childs==NULL) {
+            int indices_offset;
+            load_value(stream, indices_offset);
+            node->indices = indices[num] + indices_offset;
+        }
+        else {
+            node->childs = pool.allocate<NodePtr>(branching_);
+            for(int i=0; i<branching_; ++i) {
+                load_tree(stream, node->childs[i], num);
+            }
+        }
+    }
+
+
+
+
+    void computeLabels(int* indices, int indices_length,  int* centers, int centers_length, int* labels, DistanceType& cost)
+    {
+        cost = 0;
+        for (int i=0; i<indices_length; ++i) {
+            ElementType* point = dataset[indices[i]];
+            DistanceType dist = distance(point, dataset[centers[0]], veclen_);
+            labels[i] = 0;
+            for (int j=1; j<centers_length; ++j) {
+                DistanceType new_dist = distance(point, dataset[centers[j]], veclen_);
+                if (dist>new_dist) {
+                    labels[i] = j;
+                    dist = new_dist;
+                }
+            }
+            cost += dist;
+        }
+    }
+
+    /**
+     * The method responsible with actually doing the recursive hierarchical
+     * clustering
+     *
+     * Params:
+     *     node = the node to cluster
+     *     indices = indices of the points belonging to the current node
+     *     branching = the branching factor to use in the clustering
+     *
+     * TODO: for 1-sized clusters don't store a cluster center (it's the same as the single cluster point)
+     */
+    void computeClustering(NodePtr node, int* indices, int indices_length, int branching, int level)
+    {
+        node->size = indices_length;
+        node->level = level;
+
+        if (indices_length < leaf_size_) { // leaf node
+            node->indices = indices;
+            std::sort(node->indices,node->indices+indices_length);
+            node->childs = NULL;
+            return;
+        }
+
+        std::vector<int> centers(branching);
+        std::vector<int> labels(indices_length);
+
+        int centers_length;
+        (this->*chooseCenters)(branching, indices, indices_length, &centers[0], centers_length);
+
+        if (centers_length<branching) {
+            node->indices = indices;
+            std::sort(node->indices,node->indices+indices_length);
+            node->childs = NULL;
+            return;
+        }
+
+
+        //	assign points to clusters
+        DistanceType cost;
+        computeLabels(indices, indices_length, &centers[0], centers_length, &labels[0], cost);
+
+        node->childs = pool.allocate<NodePtr>(branching);
+        int start = 0;
+        int end = start;
+        for (int i=0; i<branching; ++i) {
+            for (int j=0; j<indices_length; ++j) {
+                if (labels[j]==i) {
+                    std::swap(indices[j],indices[end]);
+                    std::swap(labels[j],labels[end]);
+                    end++;
+                }
+            }
+
+            node->childs[i] = pool.allocate<Node>();
+            node->childs[i]->pivot = centers[i];
+            node->childs[i]->indices = NULL;
+            computeClustering(node->childs[i],indices+start, end-start, branching, level+1);
+            start=end;
+        }
+    }
+
+
+
+    /**
+     * Performs one descent in the hierarchical k-means tree. The branches not
+     * visited are stored in a priority queue.
+     *
+     * Params:
+     *      node = node to explore
+     *      result = container for the k-nearest neighbors found
+     *      vec = query points
+     *      checks = how many points in the dataset have been checked so far
+     *      maxChecks = maximum dataset points to checks
+     */
+
+
+    void findNN(NodePtr node, ResultSet<DistanceType>& result, const ElementType* vec, int& checks, int maxChecks,
+                Heap<BranchSt>* heap, std::vector<bool>& checked)
+    {
+        if (node->childs==NULL) {
+            if (checks>=maxChecks) {
+                if (result.full()) return;
+            }
+            checks += node->size;
+            for (int i=0; i<node->size; ++i) {
+                int index = node->indices[i];
+                if (!checked[index]) {
+                    DistanceType dist = distance(dataset[index], vec, veclen_);
+                    result.addPoint(dist, index);
+                    checked[index] = true;
+                }
+            }
+        }
+        else {
+            DistanceType* domain_distances = new DistanceType[branching_];
+            int best_index = 0;
+            domain_distances[best_index] = distance(vec, dataset[node->childs[best_index]->pivot], veclen_);
+            for (int i=1; i<branching_; ++i) {
+                domain_distances[i] = distance(vec, dataset[node->childs[i]->pivot], veclen_);
+                if (domain_distances[i]<domain_distances[best_index]) {
+                    best_index = i;
+                }
+            }
+            for (int i=0; i<branching_; ++i) {
+                if (i!=best_index) {
+                    heap->insert(BranchSt(node->childs[i],domain_distances[i]));
+                }
+            }
+            delete[] domain_distances;
+            findNN(node->childs[best_index],result,vec, checks, maxChecks, heap, checked);
+        }
+    }
+
+private:
+
+
+    /**
+     * The dataset used by this index
+     */
+    const Matrix<ElementType> dataset;
+
+    /**
+     * Parameters used by this index
+     */
+    IndexParams params;
+
+
+    /**
+     * Number of features in the dataset.
+     */
+    size_t size_;
+
+    /**
+     * Length of each feature.
+     */
+    size_t veclen_;
+
+    /**
+     * The root node in the tree.
+     */
+    NodePtr* root;
+
+    /**
+     *  Array of indices to vectors in the dataset.
+     */
+    int** indices;
+
+
+    /**
+     * The distance
+     */
+    Distance distance;
+
+    /**
+     * Pooled memory allocator.
+     *
+     * Using a pooled memory allocator is more efficient
+     * than allocating memory directly when there is a large
+     * number small of memory allocations.
+     */
+    PooledAllocator pool;
+
+    /**
+     * Memory occupied by the index.
+     */
+    int memoryCounter;
+
+    /** index parameters */
+    int branching_;
+    int trees_;
+    flann_centers_init_t centers_init_;
+    int leaf_size_;
+
+
+};
+
+}
+
+#endif /* OPENCV_FLANN_HIERARCHICAL_CLUSTERING_INDEX_H_ */

modules/flann/include/opencv2/flann/index_testing.h

@@ -28,36 +28,50 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_TESTING_H_
+#ifndef OPENCV_FLANN_INDEX_TESTING_H_
-#define _OPENCV_TESTING_H_
+#define OPENCV_FLANN_INDEX_TESTING_H_
 
 #include <cstring>
 #include <cassert>
+#include <cmath>
 
-#include "opencv2/flann/matrix.h"
+#include "matrix.h"
-#include "opencv2/flann/nn_index.h"
+#include "nn_index.h"
-#include "opencv2/flann/result_set.h"
+#include "result_set.h"
-#include "opencv2/flann/logger.h"
+#include "logger.h"
-#include "opencv2/flann/timer.h"
+#include "timer.h"
-
 
 
 namespace cvflann
 {
 
-CV_EXPORTS int countCorrectMatches(int* neighbors, int* groundTruth, int n);
+inline int countCorrectMatches(int* neighbors, int* groundTruth, int n)
-
-
-template <typename ELEM_TYPE>
-float computeDistanceRaport(const Matrix<ELEM_TYPE>& inputData, ELEM_TYPE* target, int* neighbors, int* groundTruth, int veclen, int n)
 {
-	ELEM_TYPE* target_end = target + veclen;
+    int count = 0;
-    float ret = 0;
+    for (int i=0; i<n; ++i) {
-    for (int i=0;i<n;++i) {
+        for (int k=0; k<n; ++k) {
-        float den = (float)flann_dist(target,target_end, inputData[groundTruth[i]]);
+            if (neighbors[i]==groundTruth[k]) {
-        float num = (float)flann_dist(target,target_end, inputData[neighbors[i]]);
+                count++;
+                break;
+            }
+        }
+    }
+    return count;
+}
 
-        if (den==0 && num==0) {
+
+template <typename Distance>
+typename Distance::ResultType computeDistanceRaport(const Matrix<typename Distance::ElementType>& inputData, typename Distance::ElementType* target,
+                                                    int* neighbors, int* groundTruth, int veclen, int n, const Distance& distance)
+{
+    typedef typename Distance::ResultType DistanceType;
+
+    DistanceType ret = 0;
+    for (int i=0; i<n; ++i) {
+        DistanceType den = distance(inputData[groundTruth[i]], target, veclen);
+        DistanceType num = distance(inputData[neighbors[i]], target, veclen);
+
+        if ((den==0)&&(num==0)) {
             ret += 1;
         }
         else {
@@ -68,20 +82,28 @@ float computeDistanceRaport(const Matrix<ELEM_TYPE>& inputData, ELEM_TYPE* targe
     return ret;
 }
 
-template <typename ELEM_TYPE>
+template <typename Distance>
-float search_with_ground_truth(NNIndex<ELEM_TYPE>& index, const Matrix<ELEM_TYPE>& inputData, const Matrix<ELEM_TYPE>& testData, const Matrix<int>& matches, int nn, int checks, float& time, float& dist, int skipMatches)
+float search_with_ground_truth(NNIndex<Distance>& index, const Matrix<typename Distance::ElementType>& inputData,
+                               const Matrix<typename Distance::ElementType>& testData, const Matrix<int>& matches, int nn, int checks,
+                               float& time, typename Distance::ResultType& dist, const Distance& distance, int skipMatches)
 {
+    typedef typename Distance::ResultType DistanceType;
+
     if (matches.cols<size_t(nn)) {
-        logger().info("matches.cols=%d, nn=%d\n",matches.cols,nn);
+        Logger::info("matches.cols=%d, nn=%d\n",matches.cols,nn);
 
         throw FLANNException("Ground truth is not computed for as many neighbors as requested");
     }
 
-    KNNResultSet<ELEM_TYPE> resultSet(nn+skipMatches);
+    KNNResultSet<DistanceType> resultSet(nn+skipMatches);
     SearchParams searchParams(checks);
 
+    int* indices = new int[nn+skipMatches];
+    DistanceType* dists = new DistanceType[nn+skipMatches];
+    int* neighbors = indices + skipMatches;
+
     int correct = 0;
-    float distR = 0;
+    DistanceType distR = 0;
     StartStopTimer t;
     int repeats = 0;
     while (t.value<0.2) {
@@ -90,65 +112,69 @@ float search_with_ground_truth(NNIndex<ELEM_TYPE>& index, const Matrix<ELEM_TYPE
         correct = 0;
         distR = 0;
         for (size_t i = 0; i < testData.rows; i++) {
-            ELEM_TYPE* target = testData[i];
+            resultSet.init(indices, dists);
-            resultSet.init(target, (int)testData.cols);
+            index.findNeighbors(resultSet, testData[i], searchParams);
-            index.findNeighbors(resultSet,target, searchParams);
-            int* neighbors = resultSet.getNeighbors();
-            neighbors = neighbors+skipMatches;
 
             correct += countCorrectMatches(neighbors,matches[i], nn);
-            distR += computeDistanceRaport(inputData, target,neighbors,matches[i], (int)testData.cols, nn);
+            distR += computeDistanceRaport<Distance>(inputData, testData[i], neighbors, matches[i], testData.cols, nn, distance);
         }
         t.stop();
     }
-    time = (float)(t.value/repeats);
+    time = float(t.value/repeats);
 
+    delete[] indices;
+    delete[] dists;
 
     float precicion = (float)correct/(nn*testData.rows);
 
     dist = distR/(testData.rows*nn);
 
-    logger().info("%8d %10.4g %10.5g %10.5g %10.5g\n",
+    Logger::info("%8d %10.4g %10.5g %10.5g %10.5g\n",
-            checks, precicion, time, 1000.0 * time / testData.rows, dist);
+                 checks, precicion, time, 1000.0 * time / testData.rows, dist);
 
     return precicion;
 }
 
 
-template <typename ELEM_TYPE>
+template <typename Distance>
-float test_index_checks(NNIndex<ELEM_TYPE>& index, const Matrix<ELEM_TYPE>& inputData, const Matrix<ELEM_TYPE>& testData, const Matrix<int>& matches,
+float test_index_checks(NNIndex<Distance>& index, const Matrix<typename Distance::ElementType>& inputData,
-            int checks, float& precision, int nn = 1, int skipMatches = 0)
+                        const Matrix<typename Distance::ElementType>& testData, const Matrix<int>& matches,
+                        int checks, float& precision, const Distance& distance, int nn = 1, int skipMatches = 0)
 {
-    logger().info("  Nodes  Precision(%)   Time(s)   Time/vec(ms)  Mean dist\n");
+    typedef typename Distance::ResultType DistanceType;
-    logger().info("---------------------------------------------------------\n");
+
+    Logger::info("  Nodes  Precision(%)   Time(s)   Time/vec(ms)  Mean dist\n");
+    Logger::info("---------------------------------------------------------\n");
 
     float time = 0;
-    float dist = 0;
+    DistanceType dist = 0;
-    precision = search_with_ground_truth(index, inputData, testData, matches, nn, checks, time, dist, skipMatches);
+    precision = search_with_ground_truth(index, inputData, testData, matches, nn, checks, time, dist, distance, skipMatches);
 
     return time;
 }
 
-template <typename ELEM_TYPE>
+template <typename Distance>
-float test_index_precision(NNIndex<ELEM_TYPE>& index, const Matrix<ELEM_TYPE>& inputData, const Matrix<ELEM_TYPE>& testData, const Matrix<int>& matches,
+float test_index_precision(NNIndex<Distance>& index, const Matrix<typename Distance::ElementType>& inputData,
-             float precision, int& checks, int nn = 1, int skipMatches = 0)
+                           const Matrix<typename Distance::ElementType>& testData, const Matrix<int>& matches,
+                           float precision, int& checks, const Distance& distance, int nn = 1, int skipMatches = 0)
 {
-	const float SEARCH_EPS = 0.001f;
+    typedef typename Distance::ResultType DistanceType;
+    const float SEARCH_EPS = 0.001f;
 
-    logger().info("  Nodes  Precision(%)   Time(s)   Time/vec(ms)  Mean dist\n");
+    Logger::info("  Nodes  Precision(%)   Time(s)   Time/vec(ms)  Mean dist\n");
-    logger().info("---------------------------------------------------------\n");
+    Logger::info("---------------------------------------------------------\n");
 
     int c2 = 1;
     float p2;
     int c1 = 1;
     float p1;
     float time;
-    float dist;
+    DistanceType dist;
 
-    p2 = search_with_ground_truth(index, inputData, testData, matches, nn, c2, time, dist, skipMatches);
+    p2 = search_with_ground_truth(index, inputData, testData, matches, nn, c2, time, dist, distance, skipMatches);
 
     if (p2>precision) {
-        logger().info("Got as close as I can\n");
+        Logger::info("Got as close as I can\n");
         checks = c2;
         return time;
     }
@@ -157,18 +183,18 @@ float test_index_precision(NNIndex<ELEM_TYPE>& index, const Matrix<ELEM_TYPE>& i
         c1 = c2;
         p1 = p2;
         c2 *=2;
-        p2 = search_with_ground_truth(index, inputData, testData, matches, nn, c2, time, dist, skipMatches);
+        p2 = search_with_ground_truth(index, inputData, testData, matches, nn, c2, time, dist, distance, skipMatches);
     }
 
     int cx;
     float realPrecision;
     if (fabs(p2-precision)>SEARCH_EPS) {
-        logger().info("Start linear estimation\n");
+        Logger::info("Start linear estimation\n");
         // after we got to values in the vecinity of the desired precision
         // use linear approximation get a better estimation
 
         cx = (c1+c2)/2;
-        realPrecision = search_with_ground_truth(index, inputData, testData, matches, nn, cx, time, dist, skipMatches);
+        realPrecision = search_with_ground_truth(index, inputData, testData, matches, nn, cx, time, dist, distance, skipMatches);
         while (fabs(realPrecision-precision)>SEARCH_EPS) {
 
             if (realPrecision<precision) {
@@ -179,17 +205,18 @@ float test_index_precision(NNIndex<ELEM_TYPE>& index, const Matrix<ELEM_TYPE>& i
             }
             cx = (c1+c2)/2;
             if (cx==c1) {
-                logger().info("Got as close as I can\n");
+                Logger::info("Got as close as I can\n");
                 break;
             }
-            realPrecision = search_with_ground_truth(index, inputData, testData, matches, nn, cx, time, dist, skipMatches);
+            realPrecision = search_with_ground_truth(index, inputData, testData, matches, nn, cx, time, dist, distance, skipMatches);
         }
 
         c2 = cx;
         p2 = realPrecision;
 
-    } else {
+    }
-        logger().info("No need for linear estimation\n");
+    else {
+        Logger::info("No need for linear estimation\n");
         cx = c2;
         realPrecision = p2;
     }
@@ -199,11 +226,14 @@ float test_index_precision(NNIndex<ELEM_TYPE>& index, const Matrix<ELEM_TYPE>& i
 }
 
 
-template <typename ELEM_TYPE>
+template <typename Distance>
-float test_index_precisions(NNIndex<ELEM_TYPE>& index, const Matrix<ELEM_TYPE>& inputData, const Matrix<ELEM_TYPE>& testData, const Matrix<int>& matches,
+void test_index_precisions(NNIndex<Distance>& index, const Matrix<typename Distance::ElementType>& inputData,
-                    float* precisions, int precisions_length, int nn = 1, int skipMatches = 0, float maxTime = 0)
+                           const Matrix<typename Distance::ElementType>& testData, const Matrix<int>& matches,
+                           float* precisions, int precisions_length, const Distance& distance, int nn = 1, int skipMatches = 0, float maxTime = 0)
 {
-	const float SEARCH_EPS = 0.001;
+    typedef typename Distance::ResultType DistanceType;
+
+    const float SEARCH_EPS = 0.001;
 
     // make sure precisions array is sorted
     std::sort(precisions, precisions+precisions_length);
@@ -211,8 +241,8 @@ float test_index_precisions(NNIndex<ELEM_TYPE>& index, const Matrix<ELEM_TYPE>&
     int pindex = 0;
     float precision = precisions[pindex];
 
-    logger().info("  Nodes  Precision(%)   Time(s)   Time/vec(ms)  Mean dist");
+    Logger::info("  Nodes  Precision(%)   Time(s)   Time/vec(ms)  Mean dist\n");
-    logger().info("---------------------------------------------------------");
+    Logger::info("---------------------------------------------------------\n");
 
     int c2 = 1;
     float p2;
@@ -221,9 +251,9 @@ float test_index_precisions(NNIndex<ELEM_TYPE>& index, const Matrix<ELEM_TYPE>&
     float p1;
 
     float time;
-    float dist;
+    DistanceType dist;
 
-    p2 = search_with_ground_truth(index, inputData, testData, matches, nn, c2, time, dist, skipMatches);
+    p2 = search_with_ground_truth(index, inputData, testData, matches, nn, c2, time, dist, distance, skipMatches);
 
     // if precision for 1 run down the tree is already
     // better then some of the requested precisions, then
@@ -233,30 +263,30 @@ float test_index_precisions(NNIndex<ELEM_TYPE>& index, const Matrix<ELEM_TYPE>&
     }
 
     if (pindex==precisions_length) {
-        logger().info("Got as close as I can\n");
+        Logger::info("Got as close as I can\n");
-        return time;
+        return;
     }
 
-    for (int i=pindex;i<precisions_length;++i) {
+    for (int i=pindex; i<precisions_length; ++i) {
 
         precision = precisions[i];
         while (p2<precision) {
             c1 = c2;
             p1 = p2;
             c2 *=2;
-            p2 = search_with_ground_truth(index, inputData, testData, matches, nn, c2, time, dist, skipMatches);
+            p2 = search_with_ground_truth(index, inputData, testData, matches, nn, c2, time, dist, distance, skipMatches);
-            if (maxTime> 0 && time > maxTime && p2<precision) return time;
+            if ((maxTime> 0)&&(time > maxTime)&&(p2<precision)) return;
         }
 
         int cx;
         float realPrecision;
         if (fabs(p2-precision)>SEARCH_EPS) {
-            logger().info("Start linear estimation\n");
+            Logger::info("Start linear estimation\n");
             // after we got to values in the vecinity of the desired precision
             // use linear approximation get a better estimation
 
             cx = (c1+c2)/2;
-            realPrecision = search_with_ground_truth(index, inputData, testData, matches, nn, cx, time, dist, skipMatches);
+            realPrecision = search_with_ground_truth(index, inputData, testData, matches, nn, cx, time, dist, distance, skipMatches);
             while (fabs(realPrecision-precision)>SEARCH_EPS) {
 
                 if (realPrecision<precision) {
@@ -267,25 +297,25 @@ float test_index_precisions(NNIndex<ELEM_TYPE>& index, const Matrix<ELEM_TYPE>&
                 }
                 cx = (c1+c2)/2;
                 if (cx==c1) {
-                    logger().info("Got as close as I can\n");
+                    Logger::info("Got as close as I can\n");
                     break;
                 }
-                realPrecision = search_with_ground_truth(index, inputData, testData, matches, nn, cx, time, dist, skipMatches);
+                realPrecision = search_with_ground_truth(index, inputData, testData, matches, nn, cx, time, dist, distance, skipMatches);
             }
 
             c2 = cx;
             p2 = realPrecision;
 
-        } else {
+        }
-            logger().info("No need for linear estimation\n");
+        else {
+            Logger::info("No need for linear estimation\n");
             cx = c2;
             realPrecision = p2;
         }
 
     }
-    return time;
 }
 
-} // namespace cvflann
+}
 
-#endif //_OPENCV_TESTING_H_
+#endif //OPENCV_FLANN_INDEX_TESTING_H_

modules/flann/include/opencv2/flann/kdtree_single_index.h

@@ -0,0 +1,634 @@
+/***********************************************************************
+ * Software License Agreement (BSD License)
+ *
+ * Copyright 2008-2009  Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
+ * Copyright 2008-2009  David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
+ *
+ * THE BSD LICENSE
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *************************************************************************/
+
+#ifndef OPENCV_FLANN_KDTREE_SINGLE_INDEX_H_
+#define OPENCV_FLANN_KDTREE_SINGLE_INDEX_H_
+
+#include <algorithm>
+#include <map>
+#include <cassert>
+#include <cstring>
+
+#include "general.h"
+#include "nn_index.h"
+#include "matrix.h"
+#include "result_set.h"
+#include "heap.h"
+#include "allocator.h"
+#include "random.h"
+#include "saving.h"
+
+namespace cvflann
+{
+
+struct KDTreeSingleIndexParams : public IndexParams
+{
+    KDTreeSingleIndexParams(int leaf_max_size = 10, bool reorder = true, int dim = -1)
+    {
+        (*this)["algorithm"] = FLANN_INDEX_KDTREE_SINGLE;
+        (*this)["leaf_max_size"] = leaf_max_size;
+        (*this)["reorder"] = reorder;
+        (*this)["dim"] = dim;
+    }
+};
+
+
+/**
+ * Randomized kd-tree index
+ *
+ * Contains the k-d trees and other information for indexing a set of points
+ * for nearest-neighbor matching.
+ */
+template <typename Distance>
+class KDTreeSingleIndex : public NNIndex<Distance>
+{
+public:
+    typedef typename Distance::ElementType ElementType;
+    typedef typename Distance::ResultType DistanceType;
+
+
+    /**
+     * KDTree constructor
+     *
+     * Params:
+     *          inputData = dataset with the input features
+     *          params = parameters passed to the kdtree algorithm
+     */
+    KDTreeSingleIndex(const Matrix<ElementType>& inputData, const IndexParams& params = KDTreeSingleIndexParams(),
+                      Distance d = Distance() ) :
+        dataset_(inputData), index_params_(params), distance_(d)
+    {
+        size_ = dataset_.rows;
+        dim_ = dataset_.cols;
+        int dim_param = get_param(params,"dim",-1);
+        if (dim_param>0) dim_ = dim_param;
+        leaf_max_size_ = get_param(params,"leaf_max_size",10);
+        reorder_ = get_param(params,"reorder",true);
+
+        // Create a permutable array of indices to the input vectors.
+        vind_.resize(size_);
+        for (size_t i = 0; i < size_; i++) {
+            vind_[i] = i;
+        }
+    }
+
+    KDTreeSingleIndex(const KDTreeSingleIndex&);
+    KDTreeSingleIndex& operator=(const KDTreeSingleIndex&);
+
+    /**
+     * Standard destructor
+     */
+    ~KDTreeSingleIndex()
+    {
+        if (reorder_) delete[] data_.data;
+    }
+
+    /**
+     * Builds the index
+     */
+    void buildIndex()
+    {
+        computeBoundingBox(root_bbox_);
+        root_node_ = divideTree(0, size_, root_bbox_ );   // construct the tree
+
+        if (reorder_) {
+            delete[] data_.data;
+            data_ = cvflann::Matrix<ElementType>(new ElementType[size_*dim_], size_, dim_);
+            for (size_t i=0; i<size_; ++i) {
+                for (size_t j=0; j<dim_; ++j) {
+                    data_[i][j] = dataset_[vind_[i]][j];
+                }
+            }
+        }
+        else {
+            data_ = dataset_;
+        }
+    }
+
+    flann_algorithm_t getType() const
+    {
+        return FLANN_INDEX_KDTREE_SINGLE;
+    }
+
+
+    void saveIndex(FILE* stream)
+    {
+        save_value(stream, size_);
+        save_value(stream, dim_);
+        save_value(stream, root_bbox_);
+        save_value(stream, reorder_);
+        save_value(stream, leaf_max_size_);
+        save_value(stream, vind_);
+        if (reorder_) {
+            save_value(stream, data_);
+        }
+        save_tree(stream, root_node_);
+    }
+
+
+    void loadIndex(FILE* stream)
+    {
+        load_value(stream, size_);
+        load_value(stream, dim_);
+        load_value(stream, root_bbox_);
+        load_value(stream, reorder_);
+        load_value(stream, leaf_max_size_);
+        load_value(stream, vind_);
+        if (reorder_) {
+            load_value(stream, data_);
+        }
+        else {
+            data_ = dataset_;
+        }
+        load_tree(stream, root_node_);
+
+
+        index_params_["algorithm"] = getType();
+        index_params_["leaf_max_size"] = leaf_max_size_;
+        index_params_["reorder"] = reorder_;
+    }
+
+    /**
+     *  Returns size of index.
+     */
+    size_t size() const
+    {
+        return size_;
+    }
+
+    /**
+     * Returns the length of an index feature.
+     */
+    size_t veclen() const
+    {
+        return dim_;
+    }
+
+    /**
+     * Computes the inde memory usage
+     * Returns: memory used by the index
+     */
+    int usedMemory() const
+    {
+        return pool_.usedMemory+pool_.wastedMemory+dataset_.rows*sizeof(int);  // pool memory and vind array memory
+    }
+
+
+    /**
+     * \brief Perform k-nearest neighbor search
+     * \param[in] queries The query points for which to find the nearest neighbors
+     * \param[out] indices The indices of the nearest neighbors found
+     * \param[out] dists Distances to the nearest neighbors found
+     * \param[in] knn Number of nearest neighbors to return
+     * \param[in] params Search parameters
+     */
+    void knnSearch(const Matrix<ElementType>& queries, Matrix<int>& indices, Matrix<DistanceType>& dists, int knn, const SearchParams& params)
+    {
+        assert(queries.cols == veclen());
+        assert(indices.rows >= queries.rows);
+        assert(dists.rows >= queries.rows);
+        assert(int(indices.cols) >= knn);
+        assert(int(dists.cols) >= knn);
+
+        KNNSimpleResultSet<DistanceType> resultSet(knn);
+        for (size_t i = 0; i < queries.rows; i++) {
+            resultSet.init(indices[i], dists[i]);
+            findNeighbors(resultSet, queries[i], params);
+        }
+    }
+
+    IndexParams getParameters() const
+    {
+        return index_params_;
+    }
+
+    /**
+     * Find set of nearest neighbors to vec. Their indices are stored inside
+     * the result object.
+     *
+     * Params:
+     *     result = the result object in which the indices of the nearest-neighbors are stored
+     *     vec = the vector for which to search the nearest neighbors
+     *     maxCheck = the maximum number of restarts (in a best-bin-first manner)
+     */
+    void findNeighbors(ResultSet<DistanceType>& result, const ElementType* vec, const SearchParams& searchParams)
+    {
+        float epsError = 1+get_param(searchParams,"eps",0.0f);
+
+        std::vector<DistanceType> dists(dim_,0);
+        DistanceType distsq = computeInitialDistances(vec, dists);
+        searchLevel(result, vec, root_node_, distsq, dists, epsError);
+    }
+
+private:
+
+
+    /*--------------------- Internal Data Structures --------------------------*/
+    struct Node
+    {
+    	/**
+    	 * Indices of points in leaf node
+    	 */
+    	int left, right;
+    	/**
+    	 * Dimension used for subdivision.
+    	 */
+    	int divfeat;
+    	/**
+    	 * The values used for subdivision.
+    	 */
+    	DistanceType divlow, divhigh;
+        /**
+         * The child nodes.
+         */
+        Node* child1, * child2;
+    };
+    typedef Node* NodePtr;
+
+
+    struct Interval
+    {
+        DistanceType low, high;
+    };
+
+    typedef std::vector<Interval> BoundingBox;
+
+    typedef BranchStruct<NodePtr, DistanceType> BranchSt;
+    typedef BranchSt* Branch;
+
+
+
+
+    void save_tree(FILE* stream, NodePtr tree)
+    {
+        save_value(stream, *tree);
+        if (tree->child1!=NULL) {
+            save_tree(stream, tree->child1);
+        }
+        if (tree->child2!=NULL) {
+            save_tree(stream, tree->child2);
+        }
+    }
+
+
+    void load_tree(FILE* stream, NodePtr& tree)
+    {
+        tree = pool_.allocate<Node>();
+        load_value(stream, *tree);
+        if (tree->child1!=NULL) {
+            load_tree(stream, tree->child1);
+        }
+        if (tree->child2!=NULL) {
+            load_tree(stream, tree->child2);
+        }
+    }
+
+
+    void computeBoundingBox(BoundingBox& bbox)
+    {
+        bbox.resize(dim_);
+        for (size_t i=0; i<dim_; ++i) {
+            bbox[i].low = (DistanceType)dataset_[0][i];
+            bbox[i].high = (DistanceType)dataset_[0][i];
+        }
+        for (size_t k=1; k<dataset_.rows; ++k) {
+            for (size_t i=0; i<dim_; ++i) {
+                if (dataset_[k][i]<bbox[i].low) bbox[i].low = (DistanceType)dataset_[k][i];
+                if (dataset_[k][i]>bbox[i].high) bbox[i].high = (DistanceType)dataset_[k][i];
+            }
+        }
+    }
+
+
+    /**
+     * Create a tree node that subdivides the list of vecs from vind[first]
+     * to vind[last].  The routine is called recursively on each sublist.
+     * Place a pointer to this new tree node in the location pTree.
+     *
+     * Params: pTree = the new node to create
+     *                  first = index of the first vector
+     *                  last = index of the last vector
+     */
+    NodePtr divideTree(int left, int right, BoundingBox& bbox)
+    {
+        NodePtr node = pool_.allocate<Node>(); // allocate memory
+
+        /* If too few exemplars remain, then make this a leaf node. */
+        if ( (right-left) <= leaf_max_size_) {
+            node->child1 = node->child2 = NULL;    /* Mark as leaf node. */
+            node->left = left;
+            node->right = right;
+
+            // compute bounding-box of leaf points
+            for (size_t i=0; i<dim_; ++i) {
+                bbox[i].low = (DistanceType)dataset_[vind_[left]][i];
+                bbox[i].high = (DistanceType)dataset_[vind_[left]][i];
+            }
+            for (int k=left+1; k<right; ++k) {
+                for (size_t i=0; i<dim_; ++i) {
+                    if (bbox[i].low>dataset_[vind_[k]][i]) bbox[i].low=(DistanceType)dataset_[vind_[k]][i];
+                    if (bbox[i].high<dataset_[vind_[k]][i]) bbox[i].high=(DistanceType)dataset_[vind_[k]][i];
+                }
+            }
+        }
+        else {
+            int idx;
+            int cutfeat;
+            DistanceType cutval;
+            middleSplit_(&vind_[0]+left, right-left, idx, cutfeat, cutval, bbox);
+
+            node->divfeat = cutfeat;
+
+            BoundingBox left_bbox(bbox);
+            left_bbox[cutfeat].high = cutval;
+            node->child1 = divideTree(left, left+idx, left_bbox);
+
+            BoundingBox right_bbox(bbox);
+            right_bbox[cutfeat].low = cutval;
+            node->child2 = divideTree(left+idx, right, right_bbox);
+
+            node->divlow = left_bbox[cutfeat].high;
+            node->divhigh = right_bbox[cutfeat].low;
+
+            for (size_t i=0; i<dim_; ++i) {
+                bbox[i].low = std::min(left_bbox[i].low, right_bbox[i].low);
+                bbox[i].high = std::max(left_bbox[i].high, right_bbox[i].high);
+            }
+        }
+
+        return node;
+    }
+
+    void computeMinMax(int* ind, int count, int dim, ElementType& min_elem, ElementType& max_elem)
+    {
+        min_elem = dataset_[ind[0]][dim];
+        max_elem = dataset_[ind[0]][dim];
+        for (int i=1; i<count; ++i) {
+            ElementType val = dataset_[ind[i]][dim];
+            if (val<min_elem) min_elem = val;
+            if (val>max_elem) max_elem = val;
+        }
+    }
+
+    void middleSplit(int* ind, int count, int& index, int& cutfeat, DistanceType& cutval, const BoundingBox& bbox)
+    {
+        // find the largest span from the approximate bounding box
+        ElementType max_span = bbox[0].high-bbox[0].low;
+        cutfeat = 0;
+        cutval = (bbox[0].high+bbox[0].low)/2;
+        for (size_t i=1; i<dim_; ++i) {
+            ElementType span = bbox[i].low-bbox[i].low;
+            if (span>max_span) {
+                max_span = span;
+                cutfeat = i;
+                cutval = (bbox[i].high+bbox[i].low)/2;
+            }
+        }
+
+        // compute exact span on the found dimension
+        ElementType min_elem, max_elem;
+        computeMinMax(ind, count, cutfeat, min_elem, max_elem);
+        cutval = (min_elem+max_elem)/2;
+        max_span = max_elem - min_elem;
+
+        // check if a dimension of a largest span exists
+        size_t k = cutfeat;
+        for (size_t i=0; i<dim_; ++i) {
+            if (i==k) continue;
+            ElementType span = bbox[i].high-bbox[i].low;
+            if (span>max_span) {
+                computeMinMax(ind, count, i, min_elem, max_elem);
+                span = max_elem - min_elem;
+                if (span>max_span) {
+                    max_span = span;
+                    cutfeat = i;
+                    cutval = (min_elem+max_elem)/2;
+                }
+            }
+        }
+        int lim1, lim2;
+        planeSplit(ind, count, cutfeat, cutval, lim1, lim2);
+
+        if (lim1>count/2) index = lim1;
+        else if (lim2<count/2) index = lim2;
+        else index = count/2;
+    }
+
+
+    void middleSplit_(int* ind, int count, int& index, int& cutfeat, DistanceType& cutval, const BoundingBox& bbox)
+    {
+        const float EPS=0.00001f;
+        DistanceType max_span = bbox[0].high-bbox[0].low;
+        for (size_t i=1; i<dim_; ++i) {
+            DistanceType span = bbox[i].high-bbox[i].low;
+            if (span>max_span) {
+                max_span = span;
+            }
+        }
+        DistanceType max_spread = -1;
+        cutfeat = 0;
+        for (size_t i=0; i<dim_; ++i) {
+            DistanceType span = bbox[i].high-bbox[i].low;
+            if (span>(DistanceType)((1-EPS)*max_span)) {
+                ElementType min_elem, max_elem;
+                computeMinMax(ind, count, cutfeat, min_elem, max_elem);
+                DistanceType spread = (DistanceType)(max_elem-min_elem);
+                if (spread>max_spread) {
+                    cutfeat = i;
+                    max_spread = spread;
+                }
+            }
+        }
+        // split in the middle
+        DistanceType split_val = (bbox[cutfeat].low+bbox[cutfeat].high)/2;
+        ElementType min_elem, max_elem;
+        computeMinMax(ind, count, cutfeat, min_elem, max_elem);
+
+        if (split_val<min_elem) cutval = (DistanceType)min_elem;
+        else if (split_val>max_elem) cutval = (DistanceType)max_elem;
+        else cutval = split_val;
+
+        int lim1, lim2;
+        planeSplit(ind, count, cutfeat, cutval, lim1, lim2);
+
+        if (lim1>count/2) index = lim1;
+        else if (lim2<count/2) index = lim2;
+        else index = count/2;
+    }
+
+
+    /**
+     *  Subdivide the list of points by a plane perpendicular on axe corresponding
+     *  to the 'cutfeat' dimension at 'cutval' position.
+     *
+     *  On return:
+     *  dataset[ind[0..lim1-1]][cutfeat]<cutval
+     *  dataset[ind[lim1..lim2-1]][cutfeat]==cutval
+     *  dataset[ind[lim2..count]][cutfeat]>cutval
+     */
+    void planeSplit(int* ind, int count, int cutfeat, DistanceType cutval, int& lim1, int& lim2)
+    {
+        /* Move vector indices for left subtree to front of list. */
+        int left = 0;
+        int right = count-1;
+        for (;; ) {
+            while (left<=right && dataset_[ind[left]][cutfeat]<cutval) ++left;
+            while (left<=right && dataset_[ind[right]][cutfeat]>=cutval) --right;
+            if (left>right) break;
+            std::swap(ind[left], ind[right]); ++left; --right;
+        }
+        /* If either list is empty, it means that all remaining features
+         * are identical. Split in the middle to maintain a balanced tree.
+         */
+        lim1 = left;
+        right = count-1;
+        for (;; ) {
+            while (left<=right && dataset_[ind[left]][cutfeat]<=cutval) ++left;
+            while (left<=right && dataset_[ind[right]][cutfeat]>cutval) --right;
+            if (left>right) break;
+            std::swap(ind[left], ind[right]); ++left; --right;
+        }
+        lim2 = left;
+    }
+
+    DistanceType computeInitialDistances(const ElementType* vec, std::vector<DistanceType>& dists)
+    {
+        DistanceType distsq = 0.0;
+
+        for (size_t i = 0; i < dim_; ++i) {
+            if (vec[i] < root_bbox_[i].low) {
+                dists[i] = distance_.accum_dist(vec[i], root_bbox_[i].low, i);
+                distsq += dists[i];
+            }
+            if (vec[i] > root_bbox_[i].high) {
+                dists[i] = distance_.accum_dist(vec[i], root_bbox_[i].high, i);
+                distsq += dists[i];
+            }
+        }
+
+        return distsq;
+    }
+
+    /**
+     * Performs an exact search in the tree starting from a node.
+     */
+    void searchLevel(ResultSet<DistanceType>& result_set, const ElementType* vec, const NodePtr node, DistanceType mindistsq,
+                     std::vector<DistanceType>& dists, const float epsError)
+    {
+        /* If this is a leaf node, then do check and return. */
+        if ((node->child1 == NULL)&&(node->child2 == NULL)) {
+            DistanceType worst_dist = result_set.worstDist();
+            for (int i=node->left; i<node->right; ++i) {
+                int index = reorder_ ? i : vind_[i];
+                DistanceType dist = distance_(vec, data_[index], dim_, worst_dist);
+                if (dist<worst_dist) {
+                    result_set.addPoint(dist,vind_[i]);
+                }
+            }
+            return;
+        }
+
+        /* Which child branch should be taken first? */
+        int idx = node->divfeat;
+        ElementType val = vec[idx];
+        DistanceType diff1 = val - node->divlow;
+        DistanceType diff2 = val - node->divhigh;
+
+        NodePtr bestChild;
+        NodePtr otherChild;
+        DistanceType cut_dist;
+        if ((diff1+diff2)<0) {
+            bestChild = node->child1;
+            otherChild = node->child2;
+            cut_dist = distance_.accum_dist(val, node->divhigh, idx);
+        }
+        else {
+            bestChild = node->child2;
+            otherChild = node->child1;
+            cut_dist = distance_.accum_dist( val, node->divlow, idx);
+        }
+
+        /* Call recursively to search next level down. */
+        searchLevel(result_set, vec, bestChild, mindistsq, dists, epsError);
+
+        DistanceType dst = dists[idx];
+        mindistsq = mindistsq + cut_dist - dst;
+        dists[idx] = cut_dist;
+        if (mindistsq*epsError<=result_set.worstDist()) {
+            searchLevel(result_set, vec, otherChild, mindistsq, dists, epsError);
+        }
+        dists[idx] = dst;
+    }
+
+private:
+
+    /**
+     * The dataset used by this index
+     */
+    const Matrix<ElementType> dataset_;
+
+    IndexParams index_params_;
+
+    int leaf_max_size_;
+    bool reorder_;
+
+
+    /**
+     *  Array of indices to vectors in the dataset.
+     */
+    std::vector<int> vind_;
+
+    Matrix<ElementType> data_;
+
+    size_t size_;
+    size_t dim_;
+
+    /**
+     * Array of k-d trees used to find neighbours.
+     */
+    NodePtr root_node_;
+
+    BoundingBox root_bbox_;
+
+    /**
+     * Pooled memory allocator.
+     *
+     * Using a pooled memory allocator is more efficient
+     * than allocating memory directly when there is a large
+     * number small of memory allocations.
+     */
+    PooledAllocator pool_;
+
+    Distance distance_;
+};   // class KDTree
+
+}
+
+#endif //OPENCV_FLANN_KDTREE_SINGLE_INDEX_H_

modules/flann/include/opencv2/flann/linear_index.h

@@ -28,41 +28,40 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_LINEARSEARCH_H_
+#ifndef OPENCV_FLANN_LINEAR_INDEX_H_
-#define _OPENCV_LINEARSEARCH_H_
+#define OPENCV_FLANN_LINEAR_INDEX_H_
-
-#include "opencv2/flann/general.h"
-#include "opencv2/flann/nn_index.h"
 
+#include "general.h"
+#include "nn_index.h"
 
 namespace cvflann
 {
 
-struct CV_EXPORTS LinearIndexParams : public IndexParams {
+struct LinearIndexParams : public IndexParams
-	LinearIndexParams() : IndexParams(FLANN_INDEX_LINEAR) {};
+{
-
+    LinearIndexParams()
-	void print() const
+    {
-	{
+        (* this)["algorithm"] = FLANN_INDEX_LINEAR;
-		logger().info("Index type: %d\n",(int)algorithm);
+    }
-	}
 };
 
-
+template <typename Distance>
-template <typename ELEM_TYPE, typename DIST_TYPE = typename DistType<ELEM_TYPE>::type >
+class LinearIndex : public NNIndex<Distance>
-class LinearIndex : public NNIndex<ELEM_TYPE>
 {
-	const Matrix<ELEM_TYPE> dataset;
-	const LinearIndexParams& index_params;
-
-	LinearIndex(const LinearIndex&);
-	LinearIndex& operator=(const LinearIndex&);
-
 public:
 
-	LinearIndex(const Matrix<ELEM_TYPE>& inputData, const LinearIndexParams& params = LinearIndexParams() ) :
+    typedef typename Distance::ElementType ElementType;
-		dataset(inputData), index_params(params)
+    typedef typename Distance::ResultType DistanceType;
-	{
+
-	}
+
+    LinearIndex(const Matrix<ElementType>& inputData, const IndexParams& params = LinearIndexParams(),
+                Distance d = Distance()) :
+        dataset_(inputData), index_params_(params), distance_(d)
+    {
+    }
+
+    LinearIndex(const LinearIndex&);
+    LinearIndex& operator=(const LinearIndex&);
 
     flann_algorithm_t getType() const
     {
@@ -70,52 +69,64 @@ public:
     }
 
 
-	size_t size() const
+    size_t size() const
-	{
+    {
-		return dataset.rows;
+        return dataset_.rows;
-	}
+    }
 
-	size_t veclen() const
+    size_t veclen() const
-	{
+    {
-		return dataset.cols;
+        return dataset_.cols;
-	}
+    }
 
 
-	int usedMemory() const
+    int usedMemory() const
-	{
+    {
-		return 0;
+        return 0;
-	}
+    }
 
-	void buildIndex()
+    void buildIndex()
-	{
+    {
-		/* nothing to do here for linear search */
+        /* nothing to do here for linear search */
-	}
+    }
 
     void saveIndex(FILE*)
     {
-		/* nothing to do here for linear search */
+        /* nothing to do here for linear search */
     }
 
 
     void loadIndex(FILE*)
     {
-		/* nothing to do here for linear search */
+        /* nothing to do here for linear search */
+
+        index_params_["algorithm"] = getType();
     }
 
-	void findNeighbors(ResultSet<ELEM_TYPE>& resultSet, const ELEM_TYPE*, const SearchParams&)
+    void findNeighbors(ResultSet<DistanceType>& resultSet, const ElementType* vec, const SearchParams& /*searchParams*/)
-	{
+    {
-		for (size_t i=0;i<dataset.rows;++i) {
+        ElementType* data = dataset_.data;
-			resultSet.addPoint(dataset[i],(int)i);
+        for (size_t i = 0; i < dataset_.rows; ++i, data += dataset_.cols) {
-		}
+            DistanceType dist = distance_(data, vec, dataset_.cols);
-	}
+            resultSet.addPoint(dist, i);
+        }
+    }
 
-	const IndexParams* getParameters() const
+    IndexParams getParameters() const
-	{
+    {
-		return &index_params;
+        return index_params_;
-	}
+    }
+
+private:
+    /** The dataset */
+    const Matrix<ElementType> dataset_;
+    /** Index parameters */
+    IndexParams index_params_;
+    /** Index distance */
+    Distance distance_;
 
 };
 
-} // namespace cvflann
+}
 
-#endif // _OPENCV_LINEARSEARCH_H_
+#endif // OPENCV_FLANN_LINEAR_INDEX_H_

modules/flann/include/opencv2/flann/logger.h

@@ -28,40 +28,36 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_LOGGER_H_
+#ifndef FLANN_LOGGER_H
-#define _OPENCV_LOGGER_H_
+#define FLANN_LOGGER_H
 
-#include <cstdio>
+#include <stdio.h>
 #include <stdarg.h>
 
+#include "defines.h"
+
+
 namespace cvflann
 {
-    
+
-enum flann_log_level_t {
+class Logger
-    FLANN_LOG_NONE = 0,
-    FLANN_LOG_FATAL = 1,
-    FLANN_LOG_ERROR = 2,
-    FLANN_LOG_WARN = 3,
-    FLANN_LOG_INFO = 4
-};
-    
-class CV_EXPORTS Logger
 {
-    FILE* stream;
+    Logger() : stream(stdout), logLevel(FLANN_LOG_WARN) {}
-    int logLevel;
-
-public:
-
-    Logger() : stream(stdout), logLevel(FLANN_LOG_WARN) {};
 
     ~Logger()
     {
-        if (stream!=NULL && stream!=stdout) {
+        if ((stream!=NULL)&&(stream!=stdout)) {
             fclose(stream);
         }
     }
 
-    void setDestination(const char* name)
+    static Logger& instance()
+    {
+        static Logger logger;
+        return logger;
+    }
+
+    void _setDestination(const char* name)
     {
         if (name==NULL) {
             stream = stdout;
@@ -74,23 +70,61 @@ public:
         }
     }
 
-    void setLevel(int level) { logLevel = level; }
+    int _log(int level, const char* fmt, va_list arglist)
+    {
+        if (level > logLevel ) return -1;
+        int ret = vfprintf(stream, fmt, arglist);
+        return ret;
+    }
 
-    int log(int level, const char* fmt, ...);
+public:
+    /**
+     * Sets the logging level. All messages with lower priority will be ignored.
+     * @param level Logging level
+     */
+    static void setLevel(int level) { instance().logLevel = level; }
 
-    int log(int level, const char* fmt, va_list arglist);
+    /**
+     * Sets the logging destination
+     * @param name Filename or NULL for console
+     */
+    static void setDestination(const char* name) { instance()._setDestination(name); }
 
-    int fatal(const char* fmt, ...);
+    /**
+     * Print log message
+     * @param level Log level
+     * @param fmt Message format
+     * @return
+     */
+    static int log(int level, const char* fmt, ...)
+    {
+        va_list arglist;
+        va_start(arglist, fmt);
+        int ret = instance()._log(level,fmt,arglist);
+        va_end(arglist);
+        return ret;
+    }
 
-    int error(const char* fmt, ...);
+#define LOG_METHOD(NAME,LEVEL) \
+    static int NAME(const char* fmt, ...) \
+    { \
+        va_list ap; \
+        va_start(ap, fmt); \
+        int ret = instance()._log(LEVEL, fmt, ap); \
+        va_end(ap); \
+        return ret; \
+    }
 
-    int warn(const char* fmt, ...);
+    LOG_METHOD(fatal, FLANN_LOG_FATAL)
+    LOG_METHOD(error, FLANN_LOG_ERROR)
+    LOG_METHOD(warn, FLANN_LOG_WARN)
+    LOG_METHOD(info, FLANN_LOG_INFO)
 
-    int info(const char* fmt, ...);
+private:
+    FILE* stream;
+    int logLevel;
 };
 
-CV_EXPORTS Logger& logger();
+}
 
-} // namespace cvflann
+#endif //FLANN_LOGGER_H
-
-#endif //_OPENCV_LOGGER_H_

modules/flann/include/opencv2/flann/lsh_index.h

@@ -0,0 +1,388 @@
+/***********************************************************************
+ * Software License Agreement (BSD License)
+ *
+ * Copyright 2008-2009  Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
+ * Copyright 2008-2009  David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
+ *
+ * THE BSD LICENSE
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *************************************************************************/
+
+/***********************************************************************
+ * Author: Vincent Rabaud
+ *************************************************************************/
+
+#ifndef OPENCV_FLANN_LSH_INDEX_H_
+#define OPENCV_FLANN_LSH_INDEX_H_
+
+#include <algorithm>
+#include <cassert>
+#include <cstring>
+#include <map>
+#include <vector>
+
+#include "general.h"
+#include "nn_index.h"
+#include "matrix.h"
+#include "result_set.h"
+#include "heap.h"
+#include "lsh_table.h"
+#include "allocator.h"
+#include "random.h"
+#include "saving.h"
+
+namespace cvflann
+{
+
+struct LshIndexParams : public IndexParams
+{
+    LshIndexParams(unsigned int table_number, unsigned int key_size, unsigned int multi_probe_level)
+    {
+        (* this)["algorithm"] = FLANN_INDEX_LSH;
+        // The number of hash tables to use
+        (*this)["table_number"] = table_number;
+        // The length of the key in the hash tables
+        (*this)["key_size"] = key_size;
+        // Number of levels to use in multi-probe (0 for standard LSH)
+        (*this)["multi_probe_level"] = multi_probe_level;
+    }
+};
+
+/**
+ * Randomized kd-tree index
+ *
+ * Contains the k-d trees and other information for indexing a set of points
+ * for nearest-neighbor matching.
+ */
+template<typename Distance>
+class LshIndex : public NNIndex<Distance>
+{
+public:
+    typedef typename Distance::ElementType ElementType;
+    typedef typename Distance::ResultType DistanceType;
+
+    /** Constructor
+     * @param input_data dataset with the input features
+     * @param params parameters passed to the LSH algorithm
+     * @param d the distance used
+     */
+    LshIndex(const Matrix<ElementType>& input_data, const IndexParams& params = LshIndexParams(),
+             Distance d = Distance()) :
+        dataset_(input_data), index_params_(params), distance_(d)
+    {
+        table_number_ = get_param<unsigned int>(index_params_,"table_number",12);
+        key_size_ = get_param<unsigned int>(index_params_,"key_size",20);
+        multi_probe_level_ = get_param<unsigned int>(index_params_,"multi_probe_level",2);
+
+        feature_size_ = dataset_.cols;
+        fill_xor_mask(0, key_size_, multi_probe_level_, xor_masks_);
+    }
+
+
+    LshIndex(const LshIndex&);
+    LshIndex& operator=(const LshIndex&);
+
+    /**
+     * Builds the index
+     */
+    void buildIndex()
+    {
+        tables_.resize(table_number_);
+        for (unsigned int i = 0; i < table_number_; ++i) {
+            lsh::LshTable<ElementType>& table = tables_[i];
+            table = lsh::LshTable<ElementType>(feature_size_, key_size_);
+
+            // Add the features to the table
+            table.add(dataset_);
+        }
+    }
+
+    flann_algorithm_t getType() const
+    {
+        return FLANN_INDEX_LSH;
+    }
+
+
+    void saveIndex(FILE* stream)
+    {
+        save_value(stream,table_number_);
+        save_value(stream,key_size_);
+        save_value(stream,multi_probe_level_);
+        save_value(stream, dataset_);
+    }
+
+    void loadIndex(FILE* stream)
+    {
+        load_value(stream, table_number_);
+        load_value(stream, key_size_);
+        load_value(stream, multi_probe_level_);
+        load_value(stream, dataset_);
+        // Building the index is so fast we can afford not storing it
+        buildIndex();
+
+        index_params_["algorithm"] = getType();
+        index_params_["table_number"] = table_number_;
+        index_params_["key_size"] = key_size_;
+        index_params_["multi_probe_level"] = multi_probe_level_;
+    }
+
+    /**
+     *  Returns size of index.
+     */
+    size_t size() const
+    {
+        return dataset_.rows;
+    }
+
+    /**
+     * Returns the length of an index feature.
+     */
+    size_t veclen() const
+    {
+        return feature_size_;
+    }
+
+    /**
+     * Computes the index memory usage
+     * Returns: memory used by the index
+     */
+    int usedMemory() const
+    {
+        return dataset_.rows * sizeof(int);
+    }
+
+
+    IndexParams getParameters() const
+    {
+        return index_params_;
+    }
+
+    /**
+     * \brief Perform k-nearest neighbor search
+     * \param[in] queries The query points for which to find the nearest neighbors
+     * \param[out] indices The indices of the nearest neighbors found
+     * \param[out] dists Distances to the nearest neighbors found
+     * \param[in] knn Number of nearest neighbors to return
+     * \param[in] params Search parameters
+     */
+    virtual void knnSearch(const Matrix<ElementType>& queries, Matrix<int>& indices, Matrix<DistanceType>& dists, int knn, const SearchParams& params)
+    {
+        assert(queries.cols == veclen());
+        assert(indices.rows >= queries.rows);
+        assert(dists.rows >= queries.rows);
+        assert(int(indices.cols) >= knn);
+        assert(int(dists.cols) >= knn);
+
+
+        KNNUniqueResultSet<DistanceType> resultSet(knn);
+        for (size_t i = 0; i < queries.rows; i++) {
+            resultSet.clear();
+            findNeighbors(resultSet, queries[i], params);
+            if (get_param(params,"sorted",true)) resultSet.sortAndCopy(indices[i], dists[i], knn);
+            else resultSet.copy(indices[i], dists[i], knn);
+        }
+    }
+
+
+    /**
+     * Find set of nearest neighbors to vec. Their indices are stored inside
+     * the result object.
+     *
+     * Params:
+     *     result = the result object in which the indices of the nearest-neighbors are stored
+     *     vec = the vector for which to search the nearest neighbors
+     *     maxCheck = the maximum number of restarts (in a best-bin-first manner)
+     */
+    void findNeighbors(ResultSet<DistanceType>& result, const ElementType* vec, const SearchParams& /*searchParams*/)
+    {
+        getNeighbors(vec, result);
+    }
+
+private:
+    /** Defines the comparator on score and index
+     */
+    typedef std::pair<float, unsigned int> ScoreIndexPair;
+    struct SortScoreIndexPairOnSecond
+    {
+        bool operator()(const ScoreIndexPair& left, const ScoreIndexPair& right) const
+        {
+            return left.second < right.second;
+        }
+    };
+
+    /** Fills the different xor masks to use when getting the neighbors in multi-probe LSH
+     * @param key the key we build neighbors from
+     * @param lowest_index the lowest index of the bit set
+     * @param level the multi-probe level we are at
+     * @param xor_masks all the xor mask
+     */
+    void fill_xor_mask(lsh::BucketKey key, int lowest_index, unsigned int level,
+                       std::vector<lsh::BucketKey>& xor_masks)
+    {
+        xor_masks.push_back(key);
+        if (level == 0) return;
+        for (int index = lowest_index - 1; index >= 0; --index) {
+            // Create a new key
+            lsh::BucketKey new_key = key | (1 << index);
+            fill_xor_mask(new_key, index, level - 1, xor_masks);
+        }
+    }
+
+    /** Performs the approximate nearest-neighbor search.
+     * @param vec the feature to analyze
+     * @param do_radius flag indicating if we check the radius too
+     * @param radius the radius if it is a radius search
+     * @param do_k flag indicating if we limit the number of nn
+     * @param k_nn the number of nearest neighbors
+     * @param checked_average used for debugging
+     */
+    void getNeighbors(const ElementType* vec, bool do_radius, float radius, bool do_k, unsigned int k_nn,
+                      float& checked_average)
+    {
+        static std::vector<ScoreIndexPair> score_index_heap;
+
+        if (do_k) {
+            unsigned int worst_score = std::numeric_limits<unsigned int>::max();
+            typename std::vector<lsh::LshTable<ElementType> >::const_iterator table = tables_.begin();
+            typename std::vector<lsh::LshTable<ElementType> >::const_iterator table_end = tables_.end();
+            for (; table != table_end; ++table) {
+                size_t key = table->getKey(vec);
+                std::vector<lsh::BucketKey>::const_iterator xor_mask = xor_masks_.begin();
+                std::vector<lsh::BucketKey>::const_iterator xor_mask_end = xor_masks_.end();
+                for (; xor_mask != xor_mask_end; ++xor_mask) {
+                    size_t sub_key = key ^ (*xor_mask);
+                    const lsh::Bucket* bucket = table->getBucketFromKey(sub_key);
+                    if (bucket == 0) continue;
+
+                    // Go over each descriptor index
+                    std::vector<lsh::FeatureIndex>::const_iterator training_index = bucket->begin();
+                    std::vector<lsh::FeatureIndex>::const_iterator last_training_index = bucket->end();
+                    DistanceType hamming_distance;
+
+                    // Process the rest of the candidates
+                    for (; training_index < last_training_index; ++training_index) {
+                        hamming_distance = distance_(vec, dataset_[*training_index], dataset_.cols);
+
+                        if (hamming_distance < worst_score) {
+                            // Insert the new element
+                            score_index_heap.push_back(ScoreIndexPair(hamming_distance, training_index));
+                            std::push_heap(score_index_heap.begin(), score_index_heap.end());
+
+                            if (score_index_heap.size() > (unsigned int)k_nn) {
+                                // Remove the highest distance value as we have too many elements
+                                std::pop_heap(score_index_heap.begin(), score_index_heap.end());
+                                score_index_heap.pop_back();
+                                // Keep track of the worst score
+                                worst_score = score_index_heap.front().first;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        else {
+            typename std::vector<lsh::LshTable<ElementType> >::const_iterator table = tables_.begin();
+            typename std::vector<lsh::LshTable<ElementType> >::const_iterator table_end = tables_.end();
+            for (; table != table_end; ++table) {
+                size_t key = table->getKey(vec);
+                std::vector<lsh::BucketKey>::const_iterator xor_mask = xor_masks_.begin();
+                std::vector<lsh::BucketKey>::const_iterator xor_mask_end = xor_masks_.end();
+                for (; xor_mask != xor_mask_end; ++xor_mask) {
+                    size_t sub_key = key ^ (*xor_mask);
+                    const lsh::Bucket* bucket = table->getBucketFromKey(sub_key);
+                    if (bucket == 0) continue;
+
+                    // Go over each descriptor index
+                    std::vector<lsh::FeatureIndex>::const_iterator training_index = bucket->begin();
+                    std::vector<lsh::FeatureIndex>::const_iterator last_training_index = bucket->end();
+                    DistanceType hamming_distance;
+
+                    // Process the rest of the candidates
+                    for (; training_index < last_training_index; ++training_index) {
+                        // Compute the Hamming distance
+                        hamming_distance = distance_(vec, dataset_[*training_index], dataset_.cols);
+                        if (hamming_distance < radius) score_index_heap.push_back(ScoreIndexPair(hamming_distance, training_index));
+                    }
+                }
+            }
+        }
+    }
+
+    /** Performs the approximate nearest-neighbor search.
+     * This is a slower version than the above as it uses the ResultSet
+     * @param vec the feature to analyze
+     */
+    void getNeighbors(const ElementType* vec, ResultSet<DistanceType>& result)
+    {
+        typename std::vector<lsh::LshTable<ElementType> >::const_iterator table = tables_.begin();
+        typename std::vector<lsh::LshTable<ElementType> >::const_iterator table_end = tables_.end();
+        for (; table != table_end; ++table) {
+            size_t key = table->getKey(vec);
+            std::vector<lsh::BucketKey>::const_iterator xor_mask = xor_masks_.begin();
+            std::vector<lsh::BucketKey>::const_iterator xor_mask_end = xor_masks_.end();
+            for (; xor_mask != xor_mask_end; ++xor_mask) {
+                size_t sub_key = key ^ (*xor_mask);
+                const lsh::Bucket* bucket = table->getBucketFromKey(sub_key);
+                if (bucket == 0) continue;
+
+                // Go over each descriptor index
+                std::vector<lsh::FeatureIndex>::const_iterator training_index = bucket->begin();
+                std::vector<lsh::FeatureIndex>::const_iterator last_training_index = bucket->end();
+                DistanceType hamming_distance;
+
+                // Process the rest of the candidates
+                for (; training_index < last_training_index; ++training_index) {
+                    // Compute the Hamming distance
+                    hamming_distance = distance_(vec, dataset_[*training_index], dataset_.cols);
+                    result.addPoint(hamming_distance, *training_index);
+                }
+            }
+        }
+    }
+
+    /** The different hash tables */
+    std::vector<lsh::LshTable<ElementType> > tables_;
+
+    /** The data the LSH tables where built from */
+    Matrix<ElementType> dataset_;
+
+    /** The size of the features (as ElementType[]) */
+    unsigned int feature_size_;
+
+    IndexParams index_params_;
+
+    /** table number */
+    unsigned int table_number_;
+    /** key size */
+    unsigned int key_size_;
+    /** How far should we look for neighbors in multi-probe LSH */
+    unsigned int multi_probe_level_;
+
+    /** The XOR masks to apply to a key to get the neighboring buckets */
+    std::vector<lsh::BucketKey> xor_masks_;
+
+    Distance distance_;
+};
+}
+
+#endif //OPENCV_FLANN_LSH_INDEX_H_

modules/flann/include/opencv2/flann/lsh_table.h

@@ -0,0 +1,477 @@
+/***********************************************************************
+ * Software License Agreement (BSD License)
+ *
+ * Copyright 2008-2009  Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
+ * Copyright 2008-2009  David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
+ *
+ * THE BSD LICENSE
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *************************************************************************/
+
+/***********************************************************************
+ * Author: Vincent Rabaud
+ *************************************************************************/
+
+#ifndef OPENCV_FLANN_LSH_TABLE_H_
+#define OPENCV_FLANN_LSH_TABLE_H_
+
+#include <algorithm>
+#include <iostream>
+#include <iomanip>
+#include <limits.h>
+// TODO as soon as we use C++0x, use the code in USE_UNORDERED_MAP
+#if USE_UNORDERED_MAP
+#include <unordered_map>
+#else
+#include <map>
+#endif
+#include <math.h>
+#include <stddef.h>
+
+#include "dynamic_bitset.h"
+#include "matrix.h"
+
+namespace cvflann
+{
+
+namespace lsh
+{
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/** What is stored in an LSH bucket
+ */
+typedef uint32_t FeatureIndex;
+/** The id from which we can get a bucket back in an LSH table
+ */
+typedef unsigned int BucketKey;
+
+/** A bucket in an LSH table
+ */
+typedef std::vector<FeatureIndex> Bucket;
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/** POD for stats about an LSH table
+ */
+struct LshStats
+{
+    std::vector<unsigned int> bucket_sizes_;
+    size_t n_buckets_;
+    size_t bucket_size_mean_;
+    size_t bucket_size_median_;
+    size_t bucket_size_min_;
+    size_t bucket_size_max_;
+    size_t bucket_size_std_dev;
+    /** Each contained vector contains three value: beginning/end for interval, number of elements in the bin
+     */
+    std::vector<std::vector<unsigned int> > size_histogram_;
+};
+
+/** Overload the << operator for LshStats
+ * @param out the streams
+ * @param stats the stats to display
+ * @return the streams
+ */
+inline std::ostream& operator <<(std::ostream& out, const LshStats& stats)
+{
+    size_t w = 20;
+    out << "Lsh Table Stats:\n" << std::setw(w) << std::setiosflags(std::ios::right) << "N buckets : "
+    << stats.n_buckets_ << "\n" << std::setw(w) << std::setiosflags(std::ios::right) << "mean size : "
+    << std::setiosflags(std::ios::left) << stats.bucket_size_mean_ << "\n" << std::setw(w)
+    << std::setiosflags(std::ios::right) << "median size : " << stats.bucket_size_median_ << "\n" << std::setw(w)
+    << std::setiosflags(std::ios::right) << "min size : " << std::setiosflags(std::ios::left)
+    << stats.bucket_size_min_ << "\n" << std::setw(w) << std::setiosflags(std::ios::right) << "max size : "
+    << std::setiosflags(std::ios::left) << stats.bucket_size_max_;
+
+    // Display the histogram
+    out << std::endl << std::setw(w) << std::setiosflags(std::ios::right) << "histogram : "
+    << std::setiosflags(std::ios::left);
+    for (std::vector<std::vector<unsigned int> >::const_iterator iterator = stats.size_histogram_.begin(), end =
+             stats.size_histogram_.end(); iterator != end; ++iterator) out << (*iterator)[0] << "-" << (*iterator)[1] << ": " << (*iterator)[2] << ",  ";
+
+    return out;
+}
+
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/** Lsh hash table. As its key is a sub-feature, and as usually
+ * the size of it is pretty small, we keep it as a continuous memory array.
+ * The value is an index in the corpus of features (we keep it as an unsigned
+ * int for pure memory reasons, it could be a size_t)
+ */
+template<typename ElementType>
+class LshTable
+{
+public:
+    /** A container of all the feature indices. Optimized for space
+     */
+#if USE_UNORDERED_MAP
+    typedef std::unordered_map<BucketKey, Bucket> BucketsSpace;
+#else
+    typedef std::map<BucketKey, Bucket> BucketsSpace;
+#endif
+
+    /** A container of all the feature indices. Optimized for speed
+     */
+    typedef std::vector<Bucket> BucketsSpeed;
+
+    /** Default constructor
+     */
+    LshTable()
+    {
+    }
+
+    /** Default constructor
+     * Create the mask and allocate the memory
+     * @param feature_size is the size of the feature (considered as a ElementType[])
+     * @param key_size is the number of bits that are turned on in the feature
+     */
+    LshTable(unsigned int /*feature_size*/, unsigned int /*key_size*/)
+    {
+        std::cerr << "LSH is not implemented for that type" << std::endl;
+        throw;
+    }
+
+    /** Add a feature to the table
+     * @param value the value to store for that feature
+     * @param feature the feature itself
+     */
+    void add(unsigned int value, const ElementType* feature)
+    {
+        // Add the value to the corresponding bucket
+        BucketKey key = getKey(feature);
+
+        switch (speed_level_) {
+        case kArray:
+            // That means we get the buckets from an array
+            buckets_speed_[key].push_back(value);
+            break;
+        case kBitsetHash:
+            // That means we can check the bitset for the presence of a key
+            key_bitset_.set(key);
+            buckets_space_[key].push_back(value);
+            break;
+        case kHash:
+        {
+            // That means we have to check for the hash table for the presence of a key
+            buckets_space_[key].push_back(value);
+            break;
+        }
+        }
+    }
+
+    /** Add a set of features to the table
+     * @param dataset the values to store
+     */
+    void add(Matrix<ElementType> dataset)
+    {
+#if USE_UNORDERED_MAP
+        if (!use_speed_) buckets_space_.rehash((buckets_space_.size() + dataset.rows) * 1.2);
+#endif
+        // Add the features to the table
+        for (unsigned int i = 0; i < dataset.rows; ++i) add(i, dataset[i]);
+        // Now that the table is full, optimize it for speed/space
+        optimize();
+    }
+
+    /** Get a bucket given the key
+     * @param key
+     * @return
+     */
+    inline const Bucket* getBucketFromKey(BucketKey key) const
+    {
+        // Generate other buckets
+        switch (speed_level_) {
+        case kArray:
+            // That means we get the buckets from an array
+            return &buckets_speed_[key];
+            break;
+        case kBitsetHash:
+            // That means we can check the bitset for the presence of a key
+            if (key_bitset_.test(key)) return &buckets_space_.at(key);
+            else return 0;
+            break;
+        case kHash:
+        {
+            // That means we have to check for the hash table for the presence of a key
+            BucketsSpace::const_iterator bucket_it, bucket_end = buckets_space_.end();
+            bucket_it = buckets_space_.find(key);
+            // Stop here if that bucket does not exist
+            if (bucket_it == bucket_end) return 0;
+            else return &bucket_it->second;
+            break;
+        }
+        }
+        return 0;
+    }
+
+    /** Compute the sub-signature of a feature
+     */
+    size_t getKey(const ElementType* /*feature*/) const
+    {
+        std::cerr << "LSH is not implemented for that type" << std::endl;
+        throw;
+        return 1;
+    }
+
+    /** Get statistics about the table
+     * @return
+     */
+    LshStats getStats() const;
+
+private:
+    /** defines the speed fo the implementation
+     * kArray uses a vector for storing data
+     * kBitsetHash uses a hash map but checks for the validity of a key with a bitset
+     * kHash uses a hash map only
+     */
+    enum SpeedLevel
+    {
+        kArray, kBitsetHash, kHash
+    };
+
+    /** Initialize some variables
+     */
+    void initialize(size_t key_size)
+    {
+        speed_level_ = kHash;
+        key_size_ = key_size;
+    }
+
+    /** Optimize the table for speed/space
+     */
+    void optimize()
+    {
+        // If we are already using the fast storage, no need to do anything
+        if (speed_level_ == kArray) return;
+
+        // Use an array if it will be more than half full
+        if (buckets_space_.size() > (unsigned int)((1 << key_size_) / 2)) {
+            speed_level_ = kArray;
+            // Fill the array version of it
+            buckets_speed_.resize(1 << key_size_);
+            for (BucketsSpace::const_iterator key_bucket = buckets_space_.begin(); key_bucket != buckets_space_.end(); ++key_bucket) buckets_speed_[key_bucket->first] = key_bucket->second;
+
+            // Empty the hash table
+            buckets_space_.clear();
+            return;
+        }
+
+        // If the bitset is going to use less than 10% of the RAM of the hash map (at least 1 size_t for the key and two
+        // for the vector) or less than 512MB (key_size_ <= 30)
+        if (((std::max(buckets_space_.size(), buckets_speed_.size()) * CHAR_BIT * 3 * sizeof(BucketKey)) / 10
+             >= size_t(1 << key_size_)) || (key_size_ <= 32)) {
+            speed_level_ = kBitsetHash;
+            key_bitset_.resize(1 << key_size_);
+            key_bitset_.reset();
+            // Try with the BucketsSpace
+            for (BucketsSpace::const_iterator key_bucket = buckets_space_.begin(); key_bucket != buckets_space_.end(); ++key_bucket) key_bitset_.set(key_bucket->first);
+        }
+        else {
+            speed_level_ = kHash;
+            key_bitset_.clear();
+        }
+    }
+
+    /** The vector of all the buckets if they are held for speed
+     */
+    BucketsSpeed buckets_speed_;
+
+    /** The hash table of all the buckets in case we cannot use the speed version
+     */
+    BucketsSpace buckets_space_;
+
+    /** What is used to store the data */
+    SpeedLevel speed_level_;
+
+    /** If the subkey is small enough, it will keep track of which subkeys are set through that bitset
+     * That is just a speedup so that we don't look in the hash table (which can be mush slower that checking a bitset)
+     */
+    DynamicBitset key_bitset_;
+
+    /** The size of the sub-signature in bits
+     */
+    unsigned int key_size_;
+
+    // Members only used for the unsigned char specialization
+    /** The mask to apply to a feature to get the hash key
+     * Only used in the unsigned char case
+     */
+    std::vector<size_t> mask_;
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Specialization for unsigned char
+
+template<>
+inline LshTable<unsigned char>::LshTable(unsigned int feature_size, unsigned int subsignature_size)
+{
+    initialize(subsignature_size);
+    // Allocate the mask
+    mask_ = std::vector<size_t>((size_t)ceil((float)(feature_size * sizeof(char)) / (float)sizeof(size_t)), 0);
+
+    // A bit brutal but fast to code
+    std::vector<size_t> indices(feature_size * CHAR_BIT);
+    for (size_t i = 0; i < feature_size * CHAR_BIT; ++i) indices[i] = i;
+    std::random_shuffle(indices.begin(), indices.end());
+
+    // Generate a random set of order of subsignature_size_ bits
+    for (unsigned int i = 0; i < key_size_; ++i) {
+        size_t index = indices[i];
+
+        // Set that bit in the mask
+        size_t divisor = CHAR_BIT * sizeof(size_t);
+        size_t idx = index / divisor; //pick the right size_t index
+        mask_[idx] |= size_t(1) << (index % divisor); //use modulo to find the bit offset
+    }
+
+    // Set to 1 if you want to display the mask for debug
+#if 0
+    {
+        size_t bcount = 0;
+        BOOST_FOREACH(size_t mask_block, mask_){
+            out << std::setw(sizeof(size_t) * CHAR_BIT / 4) << std::setfill('0') << std::hex << mask_block
+                << std::endl;
+            bcount += __builtin_popcountll(mask_block);
+        }
+        out << "bit count : " << std::dec << bcount << std::endl;
+        out << "mask size : " << mask_.size() << std::endl;
+        return out;
+    }
+#endif
+}
+
+/** Return the Subsignature of a feature
+ * @param feature the feature to analyze
+ */
+template<>
+inline size_t LshTable<unsigned char>::getKey(const unsigned char* feature) const
+{
+    // no need to check if T is dividable by sizeof(size_t) like in the Hamming
+    // distance computation as we have a mask
+    const size_t* feature_block_ptr = reinterpret_cast<const size_t*> (feature);
+
+    // Figure out the subsignature of the feature
+    // Given the feature ABCDEF, and the mask 001011, the output will be
+    // 000CEF
+    size_t subsignature = 0;
+    size_t bit_index = 1;
+
+    for (std::vector<size_t>::const_iterator pmask_block = mask_.begin(); pmask_block != mask_.end(); ++pmask_block) {
+        // get the mask and signature blocks
+        size_t feature_block = *feature_block_ptr;
+        size_t mask_block = *pmask_block;
+        while (mask_block) {
+            // Get the lowest set bit in the mask block
+            size_t lowest_bit = mask_block & (-(ptrdiff_t)mask_block);
+            // Add it to the current subsignature if necessary
+            subsignature += (feature_block & lowest_bit) ? bit_index : 0;
+            // Reset the bit in the mask block
+            mask_block ^= lowest_bit;
+            // increment the bit index for the subsignature
+            bit_index <<= 1;
+        }
+        // Check the next feature block
+        ++feature_block_ptr;
+    }
+    return subsignature;
+}
+
+template<>
+inline LshStats LshTable<unsigned char>::getStats() const
+{
+    LshStats stats;
+    stats.bucket_size_mean_ = 0;
+    if ((buckets_speed_.empty()) && (buckets_space_.empty())) {
+        stats.n_buckets_ = 0;
+        stats.bucket_size_median_ = 0;
+        stats.bucket_size_min_ = 0;
+        stats.bucket_size_max_ = 0;
+        return stats;
+    }
+
+    if (!buckets_speed_.empty()) {
+        for (BucketsSpeed::const_iterator pbucket = buckets_speed_.begin(); pbucket != buckets_speed_.end(); ++pbucket) {
+            stats.bucket_sizes_.push_back(pbucket->size());
+            stats.bucket_size_mean_ += pbucket->size();
+        }
+        stats.bucket_size_mean_ /= buckets_speed_.size();
+        stats.n_buckets_ = buckets_speed_.size();
+    }
+    else {
+        for (BucketsSpace::const_iterator x = buckets_space_.begin(); x != buckets_space_.end(); ++x) {
+            stats.bucket_sizes_.push_back(x->second.size());
+            stats.bucket_size_mean_ += x->second.size();
+        }
+        stats.bucket_size_mean_ /= buckets_space_.size();
+        stats.n_buckets_ = buckets_space_.size();
+    }
+
+    std::sort(stats.bucket_sizes_.begin(), stats.bucket_sizes_.end());
+
+    //  BOOST_FOREACH(int size, stats.bucket_sizes_)
+    //          std::cout << size << " ";
+    //  std::cout << std::endl;
+    stats.bucket_size_median_ = stats.bucket_sizes_[stats.bucket_sizes_.size() / 2];
+    stats.bucket_size_min_ = stats.bucket_sizes_.front();
+    stats.bucket_size_max_ = stats.bucket_sizes_.back();
+
+    // TODO compute mean and std
+    /*float mean, stddev;
+       stats.bucket_size_mean_ = mean;
+       stats.bucket_size_std_dev = stddev;*/
+
+    // Include a histogram of the buckets
+    unsigned int bin_start = 0;
+    unsigned int bin_end = 20;
+    bool is_new_bin = true;
+    for (std::vector<unsigned int>::iterator iterator = stats.bucket_sizes_.begin(), end = stats.bucket_sizes_.end(); iterator
+         != end; )
+        if (*iterator < bin_end) {
+            if (is_new_bin) {
+                stats.size_histogram_.push_back(std::vector<unsigned int>(3, 0));
+                stats.size_histogram_.back()[0] = bin_start;
+                stats.size_histogram_.back()[1] = bin_end - 1;
+                is_new_bin = false;
+            }
+            ++stats.size_histogram_.back()[2];
+            ++iterator;
+        }
+        else {
+            bin_start += 20;
+            bin_end += 20;
+            is_new_bin = true;
+        }
+
+    return stats;
+}
+
+// End the two namespaces
+}
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+#endif /* OPENCV_FLANN_LSH_TABLE_H_ */

modules/flann/include/opencv2/flann/matrix.h

@@ -28,60 +28,58 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_DATASET_H_
+#ifndef OPENCV_FLANN_DATASET_H_
-#define _OPENCV_DATASET_H_
+#define OPENCV_FLANN_DATASET_H_
 
 #include <stdio.h>
 
-#include "opencv2/flann/general.h"
+#include "general.h"
 
-
+namespace cvflann
-namespace cvflann 
 {
 
 /**
-* Class that implements a simple rectangular matrix stored in a memory buffer and
+ * Class that implements a simple rectangular matrix stored in a memory buffer and
-* provides convenient matrix-like access using the [] operators.
+ * provides convenient matrix-like access using the [] operators.
-*/
+ */
 template <typename T>
-class Matrix {
+class Matrix
+{
 public:
+    typedef T type;
+
     size_t rows;
     size_t cols;
+    size_t stride;
     T* data;
 
-    Matrix() : rows(0), cols(0), data(NULL)
+    Matrix() : rows(0), cols(0), stride(0), data(NULL)
     {
     }
 
-    Matrix(T* data_, long rows_, long cols_) :
+    Matrix(T* data_, size_t rows_, size_t cols_, size_t stride_ = 0) :
-    	 rows(rows_), cols(cols_), data(data_)
+        rows(rows_), cols(cols_),  stride(stride_), data(data_)
-	{
+    {
-	}
+        if (stride==0) stride = cols;
+    }
 
     /**
      * Convenience function for deallocating the storage data.
      */
-    void release()
+    FLANN_DEPRECATED void free()
     {
-        if (data!=NULL) delete[] data;
+        fprintf(stderr, "The cvflann::Matrix<T>::free() method is deprecated "
+                "and it does not do any memory deallocation any more.  You are"
+                "responsible for deallocating the matrix memory (by doing"
+                "'delete[] matrix.data' for example)");
     }
 
-	~Matrix()
-	{
-	}
-
     /**
-    * Operator that return a (pointer to a) row of the data.
+     * Operator that return a (pointer to a) row of the data.
-    */
+     */
-    T* operator[](size_t index)
-    {
-        return data+index*cols;
-    }
-
     T* operator[](size_t index) const
     {
-        return data+index*cols;
+        return data+index*stride;
     }
 };
 
@@ -95,7 +93,7 @@ public:
     flann_datatype_t type;
 
     UntypedMatrix(void* data_, long rows_, long cols_) :
-    	 rows(rows_), cols(cols_), data(data_)
+        rows(rows_), cols(cols_), data(data_)
     {
     }
 
@@ -113,6 +111,6 @@ public:
 
 
 
-} // namespace cvflann
+}
 
-#endif //_OPENCV_DATASET_H_
+#endif //OPENCV_FLANN_DATASET_H_

modules/flann/include/opencv2/flann/miniflann.hpp

@@ -0,0 +1,153 @@
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                           License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
+// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of the copyright holders may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#ifndef _OPENCV_MINIFLANN_HPP_
+#define _OPENCV_MINIFLANN_HPP_
+
+#ifdef __cplusplus
+
+#include "opencv2/core/core.hpp"
+#include "opencv2/flann/defines.h"
+
+namespace cv
+{
+ 
+namespace flann
+{
+
+struct CV_EXPORTS IndexParams
+{
+    IndexParams();
+    ~IndexParams();
+    
+    std::string getString(const std::string& key, const std::string& defaultVal=std::string()) const;
+    int getInt(const std::string& key, int defaultVal=-1) const;
+    double getDouble(const std::string& key, double defaultVal=-1) const;
+    
+    void setString(const std::string& key, const std::string& value);
+    void setInt(const std::string& key, int value);
+    void setDouble(const std::string& key, double value);
+    
+    void getAll(std::vector<std::string>& names,
+                std::vector<int>& types,
+                std::vector<std::string>& strValues,
+                std::vector<double>& numValues) const;
+    
+    void* params;
+};    
+
+struct CV_EXPORTS KDTreeIndexParams : public IndexParams
+{
+    KDTreeIndexParams(int trees=4);
+};
+    
+struct CV_EXPORTS LinearIndexParams : public IndexParams
+{
+    LinearIndexParams();
+};
+
+struct CV_EXPORTS CompositeIndexParams : public IndexParams
+{
+    CompositeIndexParams(int trees = 4, int branching = 32, int iterations = 11,
+                         flann_centers_init_t centers_init = FLANN_CENTERS_RANDOM, float cb_index = 0.2 );
+};
+
+struct CV_EXPORTS AutotunedIndexParams : public IndexParams
+{
+    AutotunedIndexParams(float target_precision = 0.8, float build_weight = 0.01,
+                         float memory_weight = 0, float sample_fraction = 0.1);
+};
+    
+struct CV_EXPORTS KMeansIndexParams : public IndexParams
+{
+    KMeansIndexParams(int branching = 32, int iterations = 11,
+                      flann_centers_init_t centers_init = FLANN_CENTERS_RANDOM, float cb_index = 0.2 );
+};
+
+struct CV_EXPORTS LshIndexParams : public IndexParams
+{
+    LshIndexParams(int table_number, int key_size, int multi_probe_level);
+};
+    
+struct CV_EXPORTS SavedIndexParams : public IndexParams
+{
+    SavedIndexParams(const std::string& filename);
+};    
+    
+struct CV_EXPORTS SearchParams : public IndexParams
+{
+    SearchParams( int checks = 32, float eps = 0, bool sorted = true );
+};    
+    
+class CV_EXPORTS_W Index
+{
+public:
+    CV_WRAP Index();
+    CV_WRAP Index(InputArray features, const IndexParams& params, flann_distance_t distType=FLANN_DIST_L2);
+    virtual ~Index();
+    
+    CV_WRAP virtual void build(InputArray features, const IndexParams& params, flann_distance_t distType=FLANN_DIST_L2);
+    CV_WRAP virtual void knnSearch(InputArray query, OutputArray indices, 
+                   OutputArray dists, int knn, const SearchParams& params=SearchParams());
+    
+    CV_WRAP virtual int radiusSearch(InputArray query, OutputArray indices,
+                             OutputArray dists, double radius, int maxResults,
+                             const SearchParams& params=SearchParams());
+    
+    CV_WRAP virtual void save(const std::string& filename) const;
+    CV_WRAP virtual bool load(InputArray features, const std::string& filename);
+    CV_WRAP virtual void release();
+    CV_WRAP flann_distance_t getDistance() const;
+    CV_WRAP flann_algorithm_t getAlgorithm() const;
+    
+protected:
+    flann_distance_t distType;
+    flann_algorithm_t algo;
+    int featureType;
+    void* index;
+};
+        
+} } // namespace cv::flann
+
+#endif // __cplusplus
+
+#endif

modules/flann/include/opencv2/flann/nn_index.h

@@ -28,79 +28,152 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_NNINDEX_H_
+#ifndef FLANN_NNINDEX_H
-#define _OPENCV_NNINDEX_H_
+#define FLANN_NNINDEX_H
 
 #include <string>
 
-#include "opencv2/flann/general.h"
+#include "general.h"
-#include "opencv2/flann/matrix.h"
+#include "matrix.h"
+#include "result_set.h"
+#include "params.h"
 
 namespace cvflann
 {
 
-
-template <typename ELEM_TYPE>
-class ResultSet;
-
 /**
-* Nearest-neighbour index base class
+ * Nearest-neighbour index base class
-*/
+ */
-template <typename ELEM_TYPE>
+template <typename Distance>
 class NNIndex
 {
+    typedef typename Distance::ElementType ElementType;
+    typedef typename Distance::ResultType DistanceType;
+
 public:
 
-	virtual ~NNIndex() {};
+    virtual ~NNIndex() {}
 
-	/**
+    /**
-	Method responsible with building the index.
+     * \brief Builds the index
-	*/
+     */
-	virtual void buildIndex() = 0;
+    virtual void buildIndex() = 0;
 
-	/**
+    /**
-	Saves the index to a stream
+     * \brief Perform k-nearest neighbor search
-	*/
+     * \param[in] queries The query points for which to find the nearest neighbors
-	virtual void saveIndex(FILE* stream) = 0;
+     * \param[out] indices The indices of the nearest neighbors found
+     * \param[out] dists Distances to the nearest neighbors found
+     * \param[in] knn Number of nearest neighbors to return
+     * \param[in] params Search parameters
+     */
+    virtual void knnSearch(const Matrix<ElementType>& queries, Matrix<int>& indices, Matrix<DistanceType>& dists, int knn, const SearchParams& params)
+    {
+        assert(queries.cols == veclen());
+        assert(indices.rows >= queries.rows);
+        assert(dists.rows >= queries.rows);
+        assert(int(indices.cols) >= knn);
+        assert(int(dists.cols) >= knn);
 
-	/**
+#if 0
-	Loads the index from a stream
+        KNNResultSet<DistanceType> resultSet(knn);
-	*/
+        for (size_t i = 0; i < queries.rows; i++) {
-	virtual void loadIndex(FILE* stream) = 0;
+            resultSet.init(indices[i], dists[i]);
+            findNeighbors(resultSet, queries[i], params);
+        }
+#else
+        KNNUniqueResultSet<DistanceType> resultSet(knn);
+        for (size_t i = 0; i < queries.rows; i++) {
+            resultSet.clear();
+            findNeighbors(resultSet, queries[i], params);
+            if (get_param(params,"sorted",true)) resultSet.sortAndCopy(indices[i], dists[i], knn);
+            else resultSet.copy(indices[i], dists[i], knn);
+        }
+#endif
+    }
 
-	/**
+    /**
-	Method that searches for nearest-neighbors
+     * \brief Perform radius search
-	*/
+     * \param[in] query The query point
-	virtual void findNeighbors(ResultSet<ELEM_TYPE>& result, const ELEM_TYPE* vec, const SearchParams& searchParams) = 0;
+     * \param[out] indices The indinces of the neighbors found within the given radius
+     * \param[out] dists The distances to the nearest neighbors found
+     * \param[in] radius The radius used for search
+     * \param[in] params Search parameters
+     * \returns Number of neighbors found
+     */
+    virtual int radiusSearch(const Matrix<ElementType>& query, Matrix<int>& indices, Matrix<DistanceType>& dists, float radius, const SearchParams& params)
+    {
+        if (query.rows != 1) {
+            fprintf(stderr, "I can only search one feature at a time for range search\n");
+            return -1;
+        }
+        assert(query.cols == veclen());
+        assert(indices.cols == dists.cols);
 
-	/**
+        int n = 0;
-	Number of features in this index.
+        int* indices_ptr = NULL;
-	*/
+        DistanceType* dists_ptr = NULL;
-	virtual size_t size() const = 0;
+        if (indices.cols > 0) {
+            n = indices.cols;
+            indices_ptr = indices[0];
+            dists_ptr = dists[0];
+        }
 
-	/**
+        RadiusUniqueResultSet<DistanceType> resultSet(radius);
-	The length of each vector in this index.
+        resultSet.clear();
-	*/
+        findNeighbors(resultSet, query[0], params);
-	virtual size_t veclen() const = 0;
+        if (n>0) {
+            if (get_param(params,"sorted",true)) resultSet.sortAndCopy(indices_ptr, dists_ptr, n);
+            else resultSet.copy(indices_ptr, dists_ptr, n);
+        }
 
-	/**
+        return resultSet.size();
-	The amount of memory (in bytes) this index uses.
+    }
-	*/
-	virtual int usedMemory() const = 0;
 
-	/**
+    /**
-	* Algorithm name
+     * \brief Saves the index to a stream
-	*/
+     * \param stream The stream to save the index to
-	virtual flann_algorithm_t getType() const = 0;
+     */
+    virtual void saveIndex(FILE* stream) = 0;
 
-	/**
+    /**
-	 * Returns the parameters used for the index
+     * \brief Loads the index from a stream
-	 */
+     * \param stream The stream from which the index is loaded
-	virtual const IndexParams* getParameters() const = 0;
+     */
+    virtual void loadIndex(FILE* stream) = 0;
 
+    /**
+     * \returns number of features in this index.
+     */
+    virtual size_t size() const = 0;
+
+    /**
+     * \returns The dimensionality of the features in this index.
+     */
+    virtual size_t veclen() const = 0;
+
+    /**
+     * \returns The amount of memory (in bytes) used by the index.
+     */
+    virtual int usedMemory() const = 0;
+
+    /**
+     * \returns The index type (kdtree, kmeans,...)
+     */
+    virtual flann_algorithm_t getType() const = 0;
+
+    /**
+     * \returns The index parameters
+     */
+    virtual IndexParams getParameters() const = 0;
+
+
+    /**
+     * \brief Method that searches for nearest-neighbours
+     */
+    virtual void findNeighbors(ResultSet<DistanceType>& result, const ElementType* vec, const SearchParams& searchParams) = 0;
 };
 
+}
 
-} // namespace cvflann
+#endif //FLANN_NNINDEX_H
-
-#endif //_OPENCV_NNINDEX_H_

modules/flann/include/opencv2/flann/object_factory.h

@@ -28,67 +28,64 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_OBJECT_FACTORY_H_
+#ifndef OPENCV_FLANN_OBJECT_FACTORY_H_
-#define _OPENCV_OBJECT_FACTORY_H_
+#define OPENCV_FLANN_OBJECT_FACTORY_H_
 
-#include "opencv2/core/types_c.h"
 #include <map>
 
 namespace cvflann
 {
 
-template<typename BaseClass, typename DerivedClass>
+class CreatorNotFound
-BaseClass* createObject()
 {
-	return new DerivedClass();
-}
-
-template<typename BaseClass, typename UniqueIdType>
-class ObjectFactory
-{
-	typedef BaseClass* (*CreateObjectFunc)();
-	std::map<UniqueIdType, CreateObjectFunc> object_registry;
-
-	// singleton class, private constructor
-	//ObjectFactory() {};
-
-public:
-   typedef typename std::map<UniqueIdType, CreateObjectFunc>::iterator Iterator;
-
-
-   template<typename DerivedClass>
-   bool register_(UniqueIdType id)
-   {
-      if (object_registry.find(id) != object_registry.end())
-               return false;
-
-      object_registry[id] = &createObject<BaseClass, DerivedClass>;
-      return true;
-   }
-
-   bool unregister(UniqueIdType id)
-   {
-      return (object_registry.erase(id) == 1);
-   }
-
-   BaseClass* create(UniqueIdType id)
-   {
-      Iterator iter = object_registry.find(id);
-
-      if (iter == object_registry.end())
-         return NULL;
-
-      return ((*iter).second)();
-   }
-
-   /*static ObjectFactory<BaseClass,UniqueIdType>& instance()
-   {
-	   static ObjectFactory<BaseClass,UniqueIdType> the_factory;
-	   return the_factory;
-   }*/
-
 };
 
-} // namespace cvflann
+template<typename BaseClass,
+         typename UniqueIdType,
+         typename ObjectCreator = BaseClass* (*)()>
+class ObjectFactory
+{
+    typedef ObjectFactory<BaseClass,UniqueIdType,ObjectCreator> ThisClass;
+    typedef std::map<UniqueIdType, ObjectCreator> ObjectRegistry;
 
-#endif /* OBJECT_FACTORY_H_ */
+    // singleton class, private constructor
+    ObjectFactory() {}
+
+public:
+
+    bool subscribe(UniqueIdType id, ObjectCreator creator)
+    {
+        if (object_registry.find(id) != object_registry.end()) return false;
+
+        object_registry[id] = creator;
+        return true;
+    }
+
+    bool unregister(UniqueIdType id)
+    {
+        return object_registry.erase(id) == 1;
+    }
+
+    ObjectCreator create(UniqueIdType id)
+    {
+        typename ObjectRegistry::const_iterator iter = object_registry.find(id);
+
+        if (iter == object_registry.end()) {
+            throw CreatorNotFound();
+        }
+
+        return iter->second;
+    }
+
+    static ThisClass& instance()
+    {
+        static ThisClass the_factory;
+        return the_factory;
+    }
+private:
+    ObjectRegistry object_registry;
+};
+
+}
+
+#endif /* OPENCV_FLANN_OBJECT_FACTORY_H_ */

modules/flann/include/opencv2/flann/params.h

@@ -0,0 +1,97 @@
+/***********************************************************************
+ * Software License Agreement (BSD License)
+ *
+ * Copyright 2008-2011  Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
+ * Copyright 2008-2011  David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *************************************************************************/
+
+
+#ifndef OPENCV_FLANN_PARAMS_H_
+#define OPENCV_FLANN_PARAMS_H_
+
+#include "any.h"
+#include "general.h"
+#include <iostream>
+#include <map>
+
+
+namespace cvflann
+{
+
+typedef cdiggins::any any;
+typedef std::map<std::string, any> IndexParams;
+
+struct SearchParams : public IndexParams
+{
+    SearchParams(int checks = 32, float eps = 0, bool sorted = true )
+    {
+        // how many leafs to visit when searching for neighbours (-1 for unlimited)
+        (*this)["checks"] = checks;
+        // search for eps-approximate neighbours (default: 0)
+        (*this)["eps"] = eps;
+        // only for radius search, require neighbours sorted by distance (default: true)
+        (*this)["sorted"] = sorted;
+    }
+};
+
+
+template<typename T>
+T get_param(const IndexParams& params, std::string name, const T& default_value)
+{
+    IndexParams::const_iterator it = params.find(name);
+    if (it != params.end()) {
+        return it->second.cast<T>();
+    }
+    else {
+        return default_value;
+    }
+}
+
+template<typename T>
+T get_param(const IndexParams& params, std::string name)
+{
+    IndexParams::const_iterator it = params.find(name);
+    if (it != params.end()) {
+        return it->second.cast<T>();
+    }
+    else {
+        throw FLANNException(std::string("Missing parameter '")+name+std::string("' in the parameters given"));
+    }
+}
+
+inline void print_params(const IndexParams& params)
+{
+    IndexParams::const_iterator it;
+
+    for(it=params.begin(); it!=params.end(); ++it) {
+        std::cout << it->first << " : " << it->second << std::endl;
+    }
+}
+
+
+
+}
+
+
+#endif /* OPENCV_FLANN_PARAMS_H_ */

modules/flann/include/opencv2/flann/random.h

@@ -28,106 +28,108 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_RANDOM_H_
+#ifndef FLANN_RANDOM_H
-#define _OPENCV_RANDOM_H_
+#define FLANN_RANDOM_H
 
 #include <algorithm>
 #include <cstdlib>
-#include <cassert>
+#include <vector>
 
+#include "general.h"
 
 namespace cvflann
 {
 
 /**
  * Seeds the random number generator
+ *  @param seed Random seed
  */
-CV_EXPORTS void seed_random(unsigned int seed);
+inline void seed_random(unsigned int seed)
+{
+    srand(seed);
+}
 
 /*
  * Generates a random double value.
  */
-CV_EXPORTS double rand_double(double high = 1.0, double low=0);
+/**
-
+ * Generates a random double value.
-/*
+ * @param high Upper limit
- * Generates a random integer value.
+ * @param low Lower limit
+ * @return Random double value
  */
-CV_EXPORTS int rand_int(int high = RAND_MAX, int low = 0);
+inline double rand_double(double high = 1.0, double low = 0)
+{
+    return low + ((high-low) * (std::rand() / (RAND_MAX + 1.0)));
+}
 
+/**
+ * Generates a random integer value.
+ * @param high Upper limit
+ * @param low Lower limit
+ * @return Random integer value
+ */
+inline int rand_int(int high = RAND_MAX, int low = 0)
+{
+    return low + (int) ( double(high-low) * (std::rand() / (RAND_MAX + 1.0)));
+}
 
 /**
  * Random number generator that returns a distinct number from
  * the [0,n) interval each time.
- *
- * TODO: improve on this to use a generator function instead of an
- * array of randomly permuted numbers
  */
-class CV_EXPORTS UniqueRandom
+class UniqueRandom
 {
-	int* vals;
+    std::vector<int> vals_;
-    int size;
+    int size_;
-	int counter;
+    int counter_;
 
 public:
-	/**
+    /**
-	 * Constructor.
+     * Constructor.
-	 * Params:
+     * @param n Size of the interval from which to generate
-	 *     n = the size of the interval from which to generate
+     * @return
-	 *     		random numbers.
+     */
-	 */
+    UniqueRandom(int n)
-	UniqueRandom(int n) : vals(NULL) {
+    {
-		init(n);
+        init(n);
-	}
+    }
 
-	~UniqueRandom()
+    /**
-	{
+     * Initializes the number generator.
-		delete[] vals;
+     * @param n the size of the interval from which to generate random numbers.
-	}
+     */
+    void init(int n)
+    {
+        // create and initialize an array of size n
+        vals_.resize(n);
+        size_ = n;
+        for (int i = 0; i < size_; ++i) vals_[i] = i;
 
-	/**
+        // shuffle the elements in the array
-	 * Initializes the number generator.
+        std::random_shuffle(vals_.begin(), vals_.end());
-	 * Params:
-	 * 		n = the size of the interval from which to generate
-	 *     		random numbers.
-	 */
-	void init(int n)
-	{
-    	// create and initialize an array of size n
-		if (vals == NULL || n!=size) {
-            delete[] vals;
-	        size = n;
-            vals = new int[size];
-    	}
-    	for(int i=0;i<size;++i) {
-			vals[i] = i;
-		}
 
-		// shuffle the elements in the array
+        counter_ = 0;
-        // Fisher-Yates shuffle
+    }
-		for (int i=size;i>0;--i) {
-// 			int rand = cast(int) (drand48() * n);
-			int rnd = rand_int(i);
-			assert(rnd >=0 && rnd < i);
-            std::swap(vals[i-1], vals[rnd]);
-		}
 
-		counter = 0;
+    /**
-	}
+     * Return a distinct random integer in greater or equal to 0 and less
-
+     * than 'n' on each call. It should be called maximum 'n' times.
-	/**
+     * Returns: a random integer
-	 * Return a distinct random integer in greater or equal to 0 and less
+     */
-	 * than 'n' on each call. It should be called maximum 'n' times.
+    int next()
-	 * Returns: a random integer
+    {
-	 */
+        if (counter_ == size_) {
-	int next() {
+            return -1;
-		if (counter==size) {
+        }
-			return -1;
+        else {
-		} else {
+            return vals_[counter_++];
-			return vals[counter++];
+        }
-		}
+    }
-	}
 };
 
-} // namespace cvflann
+}
+
+#endif //FLANN_RANDOM_H
+
 
-#endif //_OPENCV_RANDOM_H_

modules/flann/include/opencv2/flann/result_set.h

@@ -28,291 +28,516 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_RESULTSET_H_
+#ifndef FLANN_RESULTSET_H
-#define _OPENCV_RESULTSET_H_
+#define FLANN_RESULTSET_H
-
 
 #include <algorithm>
+#include <cstring>
+#include <iostream>
 #include <limits>
+#include <set>
 #include <vector>
-#include "opencv2/flann/dist.h"
-
 
 namespace cvflann
 {
 
 /* This record represents a branch point when finding neighbors in
-	the tree.  It contains a record of the minimum distance to the query
+    the tree.  It contains a record of the minimum distance to the query
-	point, as well as the node at which the search resumes.
+    point, as well as the node at which the search resumes.
-*/
+ */
 
-template <typename T>
+template <typename T, typename DistanceType>
-struct BranchStruct {
+struct BranchStruct
-	T node;           /* Tree node at which search resumes */
+{
-	float mindistsq;     /* Minimum distance to query for all nodes below. */
+    T node;           /* Tree node at which search resumes */
+    DistanceType mindist;     /* Minimum distance to query for all nodes below. */
 
-	bool operator<(const BranchStruct<T>& rhs)
+    BranchStruct() {}
-	{
+    BranchStruct(const T& aNode, DistanceType dist) : node(aNode), mindist(dist) {}
-        return mindistsq<rhs.mindistsq;
-	}
 
-    static BranchStruct<T> make_branch(const T& aNode, float dist)
+    bool operator<(const BranchStruct<T, DistanceType>& rhs) const
     {
-        BranchStruct<T> branch;
+        return mindist<rhs.mindist;
-        branch.node = aNode;
-        branch.mindistsq = dist;
-        return branch;
     }
 };
 
 
-
+template <typename DistanceType>
-
-
-template <typename ELEM_TYPE>
 class ResultSet
 {
-protected:
-
 public:
+    virtual ~ResultSet() {}
 
-	virtual ~ResultSet() {};
+    virtual bool full() const = 0;
 
-	virtual void init(const ELEM_TYPE* target_, int veclen_) = 0;
+    virtual void addPoint(DistanceType dist, int index) = 0;
 
-	virtual int* getNeighbors() = 0;
+    virtual DistanceType worstDist() const = 0;
-
-	virtual float* getDistances() = 0;
-
-	virtual size_t size() const = 0;
-
-	virtual bool full() const = 0;
-
-	virtual bool addPoint(const ELEM_TYPE* point, int index) = 0;
-
-	virtual float worstDist() const = 0;
 
 };
 
-
+/**
-template <typename ELEM_TYPE>
+ * KNNSimpleResultSet does not ensure that the element it holds are unique.
-class KNNResultSet : public ResultSet<ELEM_TYPE>
+ * Is used in those cases where the nearest neighbour algorithm used does not
+ * attempt to insert the same element multiple times.
+ */
+template <typename DistanceType>
+class KNNSimpleResultSet : public ResultSet<DistanceType>
 {
-	const ELEM_TYPE* target;
+    int* indices;
-	const ELEM_TYPE* target_end;
+    DistanceType* dists;
-    int veclen;
-
-	int* indices;
-	float* dists;
     int capacity;
-
+    int count;
-	int count;
+    DistanceType worst_distance_;
 
 public:
-	KNNResultSet(int capacity_, ELEM_TYPE* target_ = NULL, int veclen_ = 0 ) :
+    KNNSimpleResultSet(int capacity_) : capacity(capacity_), count(0)
-			target(target_), veclen(veclen_), capacity(capacity_), count(0)
-	{
-		target_end = target + veclen;
-
-        indices = new int[capacity_];
-        dists = new float[capacity_];
-	}
-
-	~KNNResultSet()
-	{
-		delete[] indices;
-		delete[] dists;
-	}
-
-	void init(const ELEM_TYPE* target_, int veclen_)
-	{
-        target = target_;
-        veclen = veclen_;
-        target_end = target + veclen;
-        count = 0;
-	}
-
-
-	int* getNeighbors()
-	{
-		return indices;
-	}
-
-    float* getDistances()
     {
-        return dists;
+    }
+
+    void init(int* indices_, DistanceType* dists_)
+    {
+        indices = indices_;
+        dists = dists_;
+        count = 0;
+        worst_distance_ = (std::numeric_limits<DistanceType>::max)();
+        dists[capacity-1] = worst_distance_;
     }
 
     size_t size() const
     {
-    	return count;
+        return count;
     }
 
-	bool full() const
+    bool full() const
-	{
+    {
-		return count == capacity;
+        return count == capacity;
-	}
+    }
 
 
-	bool addPoint(const ELEM_TYPE* point, int index)
+    void addPoint(DistanceType dist, int index)
-	{
+    {
-		for (int i=0;i<count;++i) {
+        if (dist >= worst_distance_) return;
-			if (indices[i]==index) return false;
+        int i;
-		}
+        for (i=count; i>0; --i) {
-		float dist = (float)flann_dist(target, target_end, point);
+#ifdef FLANN_FIRST_MATCH
+            if ( (dists[i-1]>dist) || ((dist==dists[i-1])&&(indices[i-1]>index)) )
+#else
+            if (dists[i-1]>dist)
+#endif
+            {
+                if (i<capacity) {
+                    dists[i] = dists[i-1];
+                    indices[i] = indices[i-1];
+                }
+            }
+            else break;
+        }
+        if (count < capacity) ++count;
+        dists[i] = dist;
+        indices[i] = index;
+        worst_distance_ = dists[capacity-1];
+    }
 
-		if (count<capacity) {
+    DistanceType worstDist() const
-			indices[count] = index;
+    {
-			dists[count] = dist;
+        return worst_distance_;
-			++count;
+    }
-		}
+};
-		else if (dist < dists[count-1] || (dist == dists[count-1] && index < indices[count-1])) {
-//         else if (dist < dists[count-1]) {
-			indices[count-1] = index;
-			dists[count-1] = dist;
-		}
-		else {
-			return false;
-		}
 
-		int i = count-1;
+/**
-		// bubble up
+ * K-Nearest neighbour result set. Ensures that the elements inserted are unique
-		while (i>=1 && (dists[i]<dists[i-1] || (dists[i]==dists[i-1] && indices[i]<indices[i-1]) ) ) {
+ */
-//         while (i>=1 && (dists[i]<dists[i-1]) ) {
+template <typename DistanceType>
-            std::swap(indices[i],indices[i-1]);
+class KNNResultSet : public ResultSet<DistanceType>
-            std::swap(dists[i],dists[i-1]);
+{
-			i--;
+    int* indices;
-		}
+    DistanceType* dists;
+    int capacity;
+    int count;
+    DistanceType worst_distance_;
 
-		return true;
+public:
-	}
+    KNNResultSet(int capacity_) : capacity(capacity_), count(0)
+    {
+    }
 
-	float worstDist() const
+    void init(int* indices_, DistanceType* dists_)
-	{
+    {
-		return (count<capacity) ? (std::numeric_limits<float>::max)() : dists[count-1];
+        indices = indices_;
-	}
+        dists = dists_;
+        count = 0;
+        worst_distance_ = (std::numeric_limits<DistanceType>::max)();
+        dists[capacity-1] = worst_distance_;
+    }
+
+    size_t size() const
+    {
+        return count;
+    }
+
+    bool full() const
+    {
+        return count == capacity;
+    }
+
+
+    void addPoint(DistanceType dist, int index)
+    {
+        if (dist >= worst_distance_) return;
+        int i;
+        for (i = count; i > 0; --i) {
+#ifdef FLANN_FIRST_MATCH
+            if ( (dists[i-1]<=dist) && ((dist!=dists[i-1])||(indices[i-1]<=index)) )
+#else
+            if (dists[i-1]<=dist)
+#endif
+            {
+                // Check for duplicate indices
+                int j = i - 1;
+                while ((j >= 0) && (dists[j] == dist)) {
+                    if (indices[j] == index) {
+                        return;
+                    }
+                    --j;
+                }
+                break;
+            }
+        }
+
+        if (count < capacity) ++count;
+        for (int j = count-1; j > i; --j) {
+            dists[j] = dists[j-1];
+            indices[j] = indices[j-1];
+        }
+        dists[i] = dist;
+        indices[i] = index;
+        worst_distance_ = dists[capacity-1];
+    }
+
+    DistanceType worstDist() const
+    {
+        return worst_distance_;
+    }
 };
 
 
 /**
  * A result-set class used when performing a radius based search.
  */
-template <typename ELEM_TYPE>
+template <typename DistanceType>
-class RadiusResultSet : public ResultSet<ELEM_TYPE>
+class RadiusResultSet : public ResultSet<DistanceType>
 {
-	const ELEM_TYPE* target;
+    DistanceType radius;
-	const ELEM_TYPE* target_end;
+    int* indices;
-    int veclen;
+    DistanceType* dists;
-
+    size_t capacity;
-	struct Item {
+    size_t count;
-		int index;
-		float dist;
-
-		bool operator<(Item rhs) {
-			return dist<rhs.dist;
-		}
-	};
-
-    std::vector<Item> items;
-	float radius;
-
-	bool sorted;
-	int* indices;
-	float* dists;
-	size_t count;
-
-private:
-	void resize_vecs()
-	{
-		if (items.size()>count) {
-			if (indices!=NULL) delete[] indices;
-			if (dists!=NULL) delete[] dists;
-			count = items.size();
-			indices = new int[count];
-			dists = new float[count];
-		}
-	}
 
 public:
-	RadiusResultSet(float radius_) :
+    RadiusResultSet(DistanceType radius_, int* indices_, DistanceType* dists_, int capacity_) :
-		radius(radius_), indices(NULL), dists(NULL)
+        radius(radius_), indices(indices_), dists(dists_), capacity(capacity_)
-	{
-		sorted = false;
-		items.reserve(16);
-		count = 0;
-	}
-
-	~RadiusResultSet()
-	{
-		if (indices!=NULL) delete[] indices;
-		if (dists!=NULL) delete[] dists;
-	}
-
-	void init(const ELEM_TYPE* target_, int veclen_)
-	{
-        target = target_;
-        veclen = veclen_;
-        target_end = target + veclen;
-        items.clear();
-        sorted = false;
-	}
-
-	int* getNeighbors()
-	{
-		if (!sorted) {
-			sorted = true;
-			sort_heap(items.begin(), items.end());
-		}
-		resize_vecs();
-		for (size_t i=0;i<items.size();++i) {
-			indices[i] = items[i].index;
-		}
-		return indices;
-	}
-
-    float* getDistances()
     {
-		if (!sorted) {
+        init();
-			sorted = true;
+    }
-			sort_heap(items.begin(), items.end());
+
-		}
+    ~RadiusResultSet()
-		resize_vecs();
+    {
-		for (size_t i=0;i<items.size();++i) {
+    }
-			dists[i] = items[i].dist;
+
-		}
+    void init()
-        return dists;
+    {
+        count = 0;
     }
 
     size_t size() const
     {
-    	return items.size();
+        return count;
     }
 
-	bool full() const
+    bool full() const
-	{
+    {
-		return true;
+        return true;
-	}
+    }
 
-	bool addPoint(const ELEM_TYPE* point, int index)
+    void addPoint(DistanceType dist, int index)
-	{
+    {
-		Item it;
+        if (dist<radius) {
-		it.index = index;
+            if ((capacity>0)&&(count < capacity)) {
-		it.dist = (float)flann_dist(target, target_end, point);
+                dists[count] = dist;
-		if (it.dist<=radius) {
+                indices[count] = index;
-			items.push_back(it);
+            }
-			push_heap(items.begin(), items.end());
+            count++;
-            return true;
+        }
-		}
+    }
-        return false;
-	}
 
-	float worstDist() const
+    DistanceType worstDist() const
-	{
+    {
-		return radius;
+        return radius;
-	}
+    }
 
 };
 
-} // namespace cvflann
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/** Class that holds the k NN neighbors
+ * Faster than KNNResultSet as it uses a binary heap and does not maintain two arrays
+ */
+template<typename DistanceType>
+class UniqueResultSet : public ResultSet<DistanceType>
+{
+public:
+    struct DistIndex
+    {
+        DistIndex(DistanceType dist, unsigned int index) :
+            dist_(dist), index_(index)
+        {
+        }
+        bool operator<(const DistIndex dist_index) const
+        {
+            return (dist_ < dist_index.dist_) || ((dist_ == dist_index.dist_) && index_ < dist_index.index_);
+        }
+        DistanceType dist_;
+        unsigned int index_;
+    };
+
+    /** Default cosntructor */
+    UniqueResultSet() :
+        worst_distance_(std::numeric_limits<DistanceType>::max())
+    {
+    }
+
+    /** Check the status of the set
+     * @return true if we have k NN
+     */
+    inline bool full() const
+    {
+        return is_full_;
+    }
+
+    /** Remove all elements in the set
+     */
+    virtual void clear() = 0;
+
+    /** Copy the set to two C arrays
+     * @param indices pointer to a C array of indices
+     * @param dist pointer to a C array of distances
+     * @param n_neighbors the number of neighbors to copy
+     */
+    virtual void copy(int* indices, DistanceType* dist, int n_neighbors = -1) const
+    {
+        if (n_neighbors < 0) {
+            for (typename std::set<DistIndex>::const_iterator dist_index = dist_indices_.begin(), dist_index_end =
+                     dist_indices_.end(); dist_index != dist_index_end; ++dist_index, ++indices, ++dist) {
+                *indices = dist_index->index_;
+                *dist = dist_index->dist_;
+            }
+        }
+        else {
+            int i = 0;
+            for (typename std::set<DistIndex>::const_iterator dist_index = dist_indices_.begin(), dist_index_end =
+                     dist_indices_.end(); (dist_index != dist_index_end) && (i < n_neighbors); ++dist_index, ++indices, ++dist, ++i) {
+                *indices = dist_index->index_;
+                *dist = dist_index->dist_;
+            }
+        }
+    }
+
+    /** Copy the set to two C arrays but sort it according to the distance first
+     * @param indices pointer to a C array of indices
+     * @param dist pointer to a C array of distances
+     * @param n_neighbors the number of neighbors to copy
+     */
+    virtual void sortAndCopy(int* indices, DistanceType* dist, int n_neighbors = -1) const
+    {
+        copy(indices, dist, n_neighbors);
+    }
+
+    /** The number of neighbors in the set
+     * @return
+     */
+    size_t size() const
+    {
+        return dist_indices_.size();
+    }
+
+    /** The distance of the furthest neighbor
+     * If we don't have enough neighbors, it returns the max possible value
+     * @return
+     */
+    inline DistanceType worstDist() const
+    {
+        return worst_distance_;
+    }
+protected:
+    /** Flag to say if the set is full */
+    bool is_full_;
+
+    /** The worst distance found so far */
+    DistanceType worst_distance_;
+
+    /** The best candidates so far */
+    std::set<DistIndex> dist_indices_;
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/** Class that holds the k NN neighbors
+ * Faster than KNNResultSet as it uses a binary heap and does not maintain two arrays
+ */
+template<typename DistanceType>
+class KNNUniqueResultSet : public UniqueResultSet<DistanceType>
+{
+public:
+    /** Constructor
+     * @param capacity the number of neighbors to store at max
+     */
+    KNNUniqueResultSet(unsigned int capacity) : capacity_(capacity)
+    {
+        this->is_full_ = false;
+        this->clear();
+    }
+
+    /** Add a possible candidate to the best neighbors
+     * @param dist distance for that neighbor
+     * @param index index of that neighbor
+     */
+    inline void addPoint(DistanceType dist, int index)
+    {
+        // Don't do anything if we are worse than the worst
+        if (dist >= worst_distance_) return;
+        dist_indices_.insert(DistIndex(dist, index));
+
+        if (is_full_) {
+            if (dist_indices_.size() > capacity_) {
+                dist_indices_.erase(*dist_indices_.rbegin());
+                worst_distance_ = dist_indices_.rbegin()->dist_;
+            }
+        }
+        else if (dist_indices_.size() == capacity_) {
+            is_full_ = true;
+            worst_distance_ = dist_indices_.rbegin()->dist_;
+        }
+    }
+
+    /** Remove all elements in the set
+     */
+    void clear()
+    {
+        dist_indices_.clear();
+        worst_distance_ = std::numeric_limits<DistanceType>::max();
+        is_full_ = false;
+    }
+
+protected:
+    typedef typename UniqueResultSet<DistanceType>::DistIndex DistIndex;
+    using UniqueResultSet<DistanceType>::is_full_;
+    using UniqueResultSet<DistanceType>::worst_distance_;
+    using UniqueResultSet<DistanceType>::dist_indices_;
+
+    /** The number of neighbors to keep */
+    unsigned int capacity_;
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/** Class that holds the radius nearest neighbors
+ * It is more accurate than RadiusResult as it is not limited in the number of neighbors
+ */
+template<typename DistanceType>
+class RadiusUniqueResultSet : public UniqueResultSet<DistanceType>
+{
+public:
+    /** Constructor
+     * @param capacity the number of neighbors to store at max
+     */
+    RadiusUniqueResultSet(DistanceType radius) :
+        radius_(radius)
+    {
+        is_full_ = true;
+    }
+
+    /** Add a possible candidate to the best neighbors
+     * @param dist distance for that neighbor
+     * @param index index of that neighbor
+     */
+    void addPoint(DistanceType dist, int index)
+    {
+        if (dist <= radius_) dist_indices_.insert(DistIndex(dist, index));
+    }
+
+    /** Remove all elements in the set
+     */
+    inline void clear()
+    {
+        dist_indices_.clear();
+    }
+
+
+    /** Check the status of the set
+     * @return alwys false
+     */
+    inline bool full() const
+    {
+        return true;
+    }
+
+    /** The distance of the furthest neighbor
+     * If we don't have enough neighbors, it returns the max possible value
+     * @return
+     */
+    inline DistanceType worstDist() const
+    {
+        return radius_;
+    }
+private:
+    typedef typename UniqueResultSet<DistanceType>::DistIndex DistIndex;
+    using UniqueResultSet<DistanceType>::dist_indices_;
+    using UniqueResultSet<DistanceType>::is_full_;
+
+    /** The furthest distance a neighbor can be */
+    DistanceType radius_;
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/** Class that holds the k NN neighbors within a radius distance
+ */
+template<typename DistanceType>
+class KNNRadiusUniqueResultSet : public KNNUniqueResultSet<DistanceType>
+{
+public:
+    /** Constructor
+     * @param capacity the number of neighbors to store at max
+     */
+    KNNRadiusUniqueResultSet(unsigned int capacity, DistanceType radius)
+    {
+        this->capacity_ = capacity;
+        this->radius_ = radius;
+        this->dist_indices_.reserve(capacity_);
+        this->clear();
+    }
+
+    /** Remove all elements in the set
+     */
+    void clear()
+    {
+        dist_indices_.clear();
+        worst_distance_ = radius_;
+        is_full_ = false;
+    }
+private:
+    using KNNUniqueResultSet<DistanceType>::dist_indices_;
+    using KNNUniqueResultSet<DistanceType>::is_full_;
+    using KNNUniqueResultSet<DistanceType>::worst_distance_;
+
+    /** The maximum number of neighbors to consider */
+    unsigned int capacity_;
+
+    /** The maximum distance of a neighbor */
+    DistanceType radius_;
+};
+}
+
+#endif //FLANN_RESULTSET_H
 
-#endif //_OPENCV_RESULTSET_H_

modules/flann/include/opencv2/flann/sampling.h

@@ -27,13 +27,11 @@
  *************************************************************************/
 
 
-#ifndef _OPENCV_SAMPLING_H_
+#ifndef OPENCV_FLANN_SAMPLING_H_
-#define _OPENCV_SAMPLING_H_
+#define OPENCV_FLANN_SAMPLING_H_
-
-
-#include "opencv2/flann/matrix.h"
-#include "opencv2/flann/random.h"
 
+#include "matrix.h"
+#include "random.h"
 
 namespace cvflann
 {
@@ -41,54 +39,43 @@ namespace cvflann
 template<typename T>
 Matrix<T> random_sample(Matrix<T>& srcMatrix, long size, bool remove = false)
 {
-    UniqueRandom rand((int)srcMatrix.rows);
+    Matrix<T> newSet(new T[size * srcMatrix.cols], size,srcMatrix.cols);
-    Matrix<T> newSet(new T[size * srcMatrix.cols], size, (long)srcMatrix.cols);
 
-    T *src,*dest;
+    T* src,* dest;
-    for (long i=0;i<size;++i) {
+    for (long i=0; i<size; ++i) {
-        long r = rand.next();
+        long r = rand_int(srcMatrix.rows-i);
         dest = newSet[i];
         src = srcMatrix[r];
-        for (size_t j=0;j<srcMatrix.cols;++j) {
+        std::copy(src, src+srcMatrix.cols, dest);
-            dest[j] = src[j];
-        }
         if (remove) {
-            dest = srcMatrix[srcMatrix.rows-i-1];
+            src = srcMatrix[srcMatrix.rows-i-1];
-            src = srcMatrix[r];
+            dest = srcMatrix[r];
-            for (size_t j=0;j<srcMatrix.cols;++j) {
+            std::copy(src, src+srcMatrix.cols, dest);
-                std::swap(*src,*dest);
-                src++;
-                dest++;
-            }
         }
     }
-
     if (remove) {
-    	srcMatrix.rows -= size;
+        srcMatrix.rows -= size;
     }
-
     return newSet;
 }
 
 template<typename T>
 Matrix<T> random_sample(const Matrix<T>& srcMatrix, size_t size)
 {
-    UniqueRandom rand((int)srcMatrix.rows);
+    UniqueRandom rand(srcMatrix.rows);
-    Matrix<T> newSet(new T[size * srcMatrix.cols], (long)size, (long)srcMatrix.cols);
+    Matrix<T> newSet(new T[size * srcMatrix.cols], size,srcMatrix.cols);
 
-    T *src,*dest;
+    T* src,* dest;
-    for (size_t i=0;i<size;++i) {
+    for (size_t i=0; i<size; ++i) {
         long r = rand.next();
         dest = newSet[i];
         src = srcMatrix[r];
-        for (size_t j=0;j<srcMatrix.cols;++j) {
+        std::copy(src, src+srcMatrix.cols, dest);
-            dest[j] = src[j];
-        }
     }
-
     return newSet;
 }
 
-} // namespace cvflann
+} // namespace
 
-#endif /* _OPENCV_SAMPLING_H_ */
+
+#endif /* OPENCV_FLANN_SAMPLING_H_ */

modules/flann/include/opencv2/flann/saving.h

@@ -26,41 +26,51 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_SAVING_H_
+#ifndef OPENCV_FLANN_SAVING_H_
-#define _OPENCV_SAVING_H_
+#define OPENCV_FLANN_SAVING_H_
 
-#include "opencv2/flann/general.h"
-#include "opencv2/flann/nn_index.h"
-#include <cstdio>
 #include <cstring>
+#include <vector>
+
+#include "general.h"
+#include "nn_index.h"
+
+#define FLANN_SIGNATURE "FLANN_INDEX"
 
 namespace cvflann
 {
-template <typename T> struct Datatype {};
-template<> struct Datatype<char> { static flann_datatype_t type() { return FLANN_INT8; } };
-template<> struct Datatype<short> { static flann_datatype_t type() { return FLANN_INT16; } };
-template<> struct Datatype<int> { static flann_datatype_t type() { return FLANN_INT32; } };
-template<> struct Datatype<unsigned char> { static flann_datatype_t type() { return FLANN_UINT8; } };
-template<> struct Datatype<unsigned short> { static flann_datatype_t type() { return FLANN_UINT16; } };
-template<> struct Datatype<unsigned int> { static flann_datatype_t type() { return FLANN_UINT32; } };
-template<> struct Datatype<float> { static flann_datatype_t type() { return FLANN_FLOAT32; } };
-template<> struct Datatype<double> { static flann_datatype_t type() { return FLANN_FLOAT64; } };
 
+template <typename T>
+struct Datatype {};
+template<>
+struct Datatype<char> { static flann_datatype_t type() { return FLANN_INT8; } };
+template<>
+struct Datatype<short> { static flann_datatype_t type() { return FLANN_INT16; } };
+template<>
+struct Datatype<int> { static flann_datatype_t type() { return FLANN_INT32; } };
+template<>
+struct Datatype<unsigned char> { static flann_datatype_t type() { return FLANN_UINT8; } };
+template<>
+struct Datatype<unsigned short> { static flann_datatype_t type() { return FLANN_UINT16; } };
+template<>
+struct Datatype<unsigned int> { static flann_datatype_t type() { return FLANN_UINT32; } };
+template<>
+struct Datatype<float> { static flann_datatype_t type() { return FLANN_FLOAT32; } };
+template<>
+struct Datatype<double> { static flann_datatype_t type() { return FLANN_FLOAT64; } };
 
-CV_EXPORTS const char* FLANN_SIGNATURE();
-CV_EXPORTS const char* FLANN_VERSION();
 
 /**
  * Structure representing the index header.
  */
-struct CV_EXPORTS IndexHeader
+struct IndexHeader
 {
-	char signature[16];
+    char signature[16];
-	char version[16];
+    char version[16];
-	flann_datatype_t data_type;
+    flann_datatype_t data_type;
-	flann_algorithm_t index_type;
+    flann_algorithm_t index_type;
-	int rows;
+    size_t rows;
-	int cols;
+    size_t cols;
 };
 
 /**
@@ -69,20 +79,20 @@ struct CV_EXPORTS IndexHeader
  * @param stream - Stream to save to
  * @param index - The index to save
  */
-template<typename ELEM_TYPE>
+template<typename Distance>
-void save_header(FILE* stream, const NNIndex<ELEM_TYPE>& index)
+void save_header(FILE* stream, const NNIndex<Distance>& index)
 {
-	IndexHeader header;
+    IndexHeader header;
-	memset(header.signature, 0 , sizeof(header.signature));
+    memset(header.signature, 0, sizeof(header.signature));
-	strcpy(header.signature, FLANN_SIGNATURE());
+    strcpy(header.signature, FLANN_SIGNATURE);
-	memset(header.version, 0 , sizeof(header.version));
+    memset(header.version, 0, sizeof(header.version));
-	strcpy(header.version, FLANN_VERSION());
+    strcpy(header.version, FLANN_VERSION);
-	header.data_type = Datatype<ELEM_TYPE>::type();
+    header.data_type = Datatype<typename Distance::ElementType>::type();
-	header.index_type = index.getType();
+    header.index_type = index.getType();
-	header.rows = (int)index.size();
+    header.rows = index.size();
-	header.cols = index.veclen();
+    header.cols = index.veclen();
 
-	std::fwrite(&header, sizeof(header),1,stream);
+    std::fwrite(&header, sizeof(header),1,stream);
 }
 
 
@@ -91,25 +101,84 @@ void save_header(FILE* stream, const NNIndex<ELEM_TYPE>& index)
  * @param stream - Stream to load from
  * @return Index header
  */
-CV_EXPORTS IndexHeader load_header(FILE* stream);
+inline IndexHeader load_header(FILE* stream)
-
-
-template<typename T>
-void save_value(FILE* stream, const T& value, int count = 1)
 {
-	fwrite(&value, 1, sizeof(value)*count, stream);
+    IndexHeader header;
+    int read_size = fread(&header,sizeof(header),1,stream);
+
+    if (read_size!=1) {
+        throw FLANNException("Invalid index file, cannot read");
+    }
+
+    if (strcmp(header.signature,FLANN_SIGNATURE)!=0) {
+        throw FLANNException("Invalid index file, wrong signature");
+    }
+
+    return header;
+
 }
 
 
 template<typename T>
-void load_value(FILE* stream, T& value, int count = 1)
+void save_value(FILE* stream, const T& value, size_t count = 1)
 {
-	int read_cnt = (int)fread(&value, sizeof(value),count, stream);
+    fwrite(&value, sizeof(value),count, stream);
-	if (read_cnt!=count) {
-		throw FLANNException("Cannot read from file");
-	}
 }
 
-} // namespace cvflann
+template<typename T>
+void save_value(FILE* stream, const cvflann::Matrix<T>& value)
+{
+    fwrite(&value, sizeof(value),1, stream);
+    fwrite(value.data, sizeof(T),value.rows*value.cols, stream);
+}
 
-#endif /* _OPENCV_SAVING_H_ */
+template<typename T>
+void save_value(FILE* stream, const std::vector<T>& value)
+{
+    size_t size = value.size();
+    fwrite(&size, sizeof(size_t), 1, stream);
+    fwrite(&value[0], sizeof(T), size, stream);
+}
+
+template<typename T>
+void load_value(FILE* stream, T& value, size_t count = 1)
+{
+    size_t read_cnt = fread(&value, sizeof(value), count, stream);
+    if (read_cnt != count) {
+        throw FLANNException("Cannot read from file");
+    }
+}
+
+template<typename T>
+void load_value(FILE* stream, cvflann::Matrix<T>& value)
+{
+    size_t read_cnt = fread(&value, sizeof(value), 1, stream);
+    if (read_cnt != 1) {
+        throw FLANNException("Cannot read from file");
+    }
+    value.data = new T[value.rows*value.cols];
+    read_cnt = fread(value.data, sizeof(T), value.rows*value.cols, stream);
+    if (read_cnt != (size_t)(value.rows*value.cols)) {
+        throw FLANNException("Cannot read from file");
+    }
+}
+
+
+template<typename T>
+void load_value(FILE* stream, std::vector<T>& value)
+{
+    size_t size;
+    size_t read_cnt = fread(&size, sizeof(size_t), 1, stream);
+    if (read_cnt!=1) {
+        throw FLANNException("Cannot read from file");
+    }
+    value.resize(size);
+    read_cnt = fread(&value[0], sizeof(T), size, stream);
+    if (read_cnt != size) {
+        throw FLANNException("Cannot read from file");
+    }
+}
+
+}
+
+#endif /* OPENCV_FLANN_SAVING_H_ */

modules/flann/include/opencv2/flann/simplex_downhill.h

@@ -28,20 +28,20 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_SIMPLEX_DOWNHILL_H_
+#ifndef OPENCV_FLANN_SIMPLEX_DOWNHILL_H_
-#define _OPENCV_SIMPLEX_DOWNHILL_H_
+#define OPENCV_FLANN_SIMPLEX_DOWNHILL_H_
 
 namespace cvflann
 {
 
 /**
     Adds val to array vals (and point to array points) and keeping the arrays sorted by vals.
-*/
+ */
 template <typename T>
 void addValue(int pos, float val, float* vals, T* point, T* points, int n)
 {
     vals[pos] = val;
-    for (int i=0;i<n;++i) {
+    for (int i=0; i<n; ++i) {
         points[pos*n+i] = point[i];
     }
 
@@ -49,7 +49,7 @@ void addValue(int pos, float val, float* vals, T* point, T* points, int n)
     int j=pos;
     while (j>0 && vals[j]<vals[j-1]) {
         swap(vals[j],vals[j-1]);
-        for (int i=0;i<n;++i) {
+        for (int i=0; i<n; ++i) {
             swap(points[j*n+i],points[(j-1)*n+i]);
         }
         --j;
@@ -64,7 +64,7 @@ void addValue(int pos, float val, float* vals, T* point, T* points, int n)
                     vals is the cost function in the n+1 simplex points, if NULL it will be computed
 
     Postcondition: returns optimum value and points[0..n] are the optimum parameters
-*/
+ */
 template <typename T, typename F>
 float optimizeSimplexDownhill(T* points, int n, F func, float* vals = NULL )
 {
@@ -84,7 +84,7 @@ float optimizeSimplexDownhill(T* points, int n, F func, float* vals = NULL )
     if (vals == NULL) {
         ownVals = true;
         vals = new float[n+1];
-        for (int i=0;i<n+1;++i) {
+        for (int i=0; i<n+1; ++i) {
             float val = func(points+i*n);
             addValue(i, val, vals, points+i*n, points, n);
         }
@@ -96,18 +96,18 @@ float optimizeSimplexDownhill(T* points, int n, F func, float* vals = NULL )
         if (iterations++ > MAX_ITERATIONS) break;
 
         // compute average of simplex points (except the highest point)
-        for (int j=0;j<n;++j) {
+        for (int j=0; j<n; ++j) {
             p_o[j] = 0;
-            for (int i=0;i<n;++i) {
+            for (int i=0; i<n; ++i) {
                 p_o[i] += points[j*n+i];
             }
         }
-        for (int i=0;i<n;++i) {
+        for (int i=0; i<n; ++i) {
             p_o[i] /= n;
         }
 
         bool converged = true;
-        for (int i=0;i<n;++i) {
+        for (int i=0; i<n; ++i) {
             if (p_o[i] != points[nn+i]) {
                 converged = false;
             }
@@ -115,15 +115,15 @@ float optimizeSimplexDownhill(T* points, int n, F func, float* vals = NULL )
         if (converged) break;
 
         // trying a reflection
-        for (int i=0;i<n;++i) {
+        for (int i=0; i<n; ++i) {
             p_r[i] = p_o[i] + alpha*(p_o[i]-points[nn+i]);
         }
         float val_r = func(p_r);
 
-        if (val_r>=vals[0] && val_r<vals[n]) {
+        if ((val_r>=vals[0])&&(val_r<vals[n])) {
             // reflection between second highest and lowest
             // add it to the simplex
-            logger().info("Choosing reflection\n");
+            Logger::info("Choosing reflection\n");
             addValue(n, val_r,vals, p_r, points, n);
             continue;
         }
@@ -132,37 +132,37 @@ float optimizeSimplexDownhill(T* points, int n, F func, float* vals = NULL )
             // value is smaller than smalest in simplex
 
             // expand some more to see if it drops further
-            for (int i=0;i<n;++i) {
+            for (int i=0; i<n; ++i) {
                 p_e[i] = 2*p_r[i]-p_o[i];
             }
             float val_e = func(p_e);
 
             if (val_e<val_r) {
-                logger().info("Choosing reflection and expansion\n");
+                Logger::info("Choosing reflection and expansion\n");
                 addValue(n, val_e,vals,p_e,points,n);
             }
             else {
-                logger().info("Choosing reflection\n");
+                Logger::info("Choosing reflection\n");
                 addValue(n, val_r,vals,p_r,points,n);
             }
             continue;
         }
         if (val_r>=vals[n]) {
-            for (int i=0;i<n;++i) {
+            for (int i=0; i<n; ++i) {
                 p_e[i] = (p_o[i]+points[nn+i])/2;
             }
             float val_e = func(p_e);
 
             if (val_e<vals[n]) {
-                logger().info("Choosing contraction\n");
+                Logger::info("Choosing contraction\n");
                 addValue(n,val_e,vals,p_e,points,n);
                 continue;
             }
         }
         {
-          logger().info("Full contraction\n");
+            Logger::info("Full contraction\n");
-            for (int j=1;j<=n;++j) {
+            for (int j=1; j<=n; ++j) {
-                for (int i=0;i<n;++i) {
+                for (int i=0; i<n; ++i) {
                     points[j*n+i] = (points[j*n+i]+points[i])/2;
                 }
                 float val = func(points+j*n);
@@ -181,6 +181,6 @@ float optimizeSimplexDownhill(T* points, int n, F func, float* vals = NULL )
     return bestVal;
 }
 
-} // namespace cvflann
+}
 
-#endif //_OPENCV_SIMPLEX_DOWNHILL_H_
+#endif //OPENCV_FLANN_SIMPLEX_DOWNHILL_H_

modules/flann/include/opencv2/flann/timer.h

@@ -28,8 +28,8 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *************************************************************************/
 
-#ifndef _OPENCV_TIMER_H_
+#ifndef FLANN_TIMER_H
-#define _OPENCV_TIMER_H_
+#define FLANN_TIMER_H
 
 #include <time.h>
 
@@ -42,7 +42,7 @@ namespace cvflann
  *
  * Can be used to time portions of code.
  */
-class CV_EXPORTS StartStopTimer
+class StartStopTimer
 {
     clock_t startTime;
 
@@ -64,14 +64,16 @@ public:
     /**
      * Starts the timer.
      */
-    void start() {
+    void start()
+    {
         startTime = clock();
     }
 
     /**
      * Stops the timer and updates timer value.
      */
-    void stop() {
+    void stop()
+    {
         clock_t stopTime = clock();
         value += ( (double)stopTime - startTime) / CLOCKS_PER_SEC;
     }
@@ -79,12 +81,13 @@ public:
     /**
      * Resets the timer value to 0.
      */
-    void reset() {
+    void reset()
+    {
         value = 0;
     }
 
 };
 
-}// namespace cvflann
+}
 
-#endif // _OPENCV_TIMER_H_
+#endif // FLANN_TIMER_H

modules/flann/src/flann.cpp

@@ -27,199 +27,31 @@
  *************************************************************************/
 
 #include "precomp.hpp"
+#include "opencv2/flann/flann.hpp"
 
 namespace cvflann
 {
-// ----------------------- dist.cpp ---------------------------
+    /** Global variable indicating the distance metric to be used.
-
+     * \deprecated Provided for backward compatibility
-/** Global variable indicating the distance metric
+    */
- * to be used.
+    flann_distance_t flann_distance_type_ = FLANN_DIST_L2;
- */
+    flann_distance_t flann_distance_type() { return flann_distance_type_; }
-flann_distance_t flann_distance_type_ = FLANN_DIST_EUCLIDEAN;
+    
-flann_distance_t flann_distance_type() { return flann_distance_type_; }
+    /**
-
+     * Set distance type to used
-/**
+     * \deprecated
- * Zero iterator that emulates a zero feature.
+     */
- */
+    void set_distance_type(flann_distance_t distance_type, int /*order*/)
-ZeroIterator<float> zero_;
+    {
-ZeroIterator<float>& zero() { return zero_; }
+        printf("[WARNING] The cvflann::set_distance_type function is deperecated, "
-
+            "use cv::flann::GenericIndex<Distance> instead.\n");
-/**
+        if (distance_type != FLANN_DIST_L1 && distance_type != FLANN_DIST_L2) {
- * Order of Minkowski distance to use.
+            printf("[ERROR] cvflann::set_distance_type only provides backwards compatibility "
- */
+            "for the L1 and L2 distances. "
-int flann_minkowski_order_;
+            "For other distance types you must use cv::flann::GenericIndex<Distance>\n");
-int flann_minkowski_order() { return flann_minkowski_order_; }
-
-
-double euclidean_dist(const unsigned char* first1, const unsigned char* last1, unsigned char* first2, double acc)
-{
-	double distsq = acc;
-	double diff0, diff1, diff2, diff3;
-	const unsigned char* lastgroup = last1 - 3;
-
-	while (first1 < lastgroup) {
-		diff0 = first1[0] - first2[0];
-		diff1 = first1[1] - first2[1];
-		diff2 = first1[2] - first2[2];
-		diff3 = first1[3] - first2[3];
-		distsq += diff0 * diff0 + diff1 * diff1 + diff2 * diff2 + diff3 * diff3;
-		first1 += 4;
-		first2 += 4;
-	}
-	while (first1 < last1) {
-		diff0 = *first1++ - *first2++;
-		distsq += diff0 * diff0;
-	}
-	return distsq;
-}
-
-// ----------------------- index_testing.cpp ---------------------------
-
-int countCorrectMatches(int* neighbors, int* groundTruth, int n)
-{
-    int count = 0;
-    for (int i=0;i<n;++i) {
-        for (int k=0;k<n;++k) {
-            if (neighbors[i]==groundTruth[k]) {
-                count++;
-                break;
-            }
         }
+        flann_distance_type_ = distance_type;
     }
-    return count;
+    
-}
+    void dummyfunc() {}
-
+}
-// ----------------------- logger.cpp ---------------------------
-
-Logger logger_;
-
-Logger& logger() { return logger_; }
-
-int Logger::log(int level, const char* fmt, ...)
-{
-    if (level > logLevel ) return -1;
-
-    int ret;
-    va_list arglist;
-    va_start(arglist, fmt);
-    ret = vfprintf(stream, fmt, arglist);
-    va_end(arglist);
-
-    return ret;
-}
-
-int Logger::log(int level, const char* fmt, va_list arglist)
-{
-    if (level > logLevel ) return -1;
-
-    int ret;
-    ret = vfprintf(stream, fmt, arglist);
-
-    return ret;
-}
-
-
-#define LOG_METHOD(NAME,LEVEL) \
-    int Logger::NAME(const char* fmt, ...) \
-    { \
-        int ret; \
-        va_list ap; \
-        va_start(ap, fmt); \
-        ret = log(LEVEL, fmt, ap); \
-        va_end(ap); \
-        return ret; \
-    }
-
-
-LOG_METHOD(fatal, FLANN_LOG_FATAL)
-LOG_METHOD(error, FLANN_LOG_ERROR)
-LOG_METHOD(warn, FLANN_LOG_WARN)
-LOG_METHOD(info, FLANN_LOG_INFO)
-
-// ----------------------- random.cpp ---------------------------
-
-void seed_random(unsigned int seed)
-{
-    srand(seed);
-}
-
-double rand_double(double high, double low)
-{
-    return low + ((high-low) * (std::rand() / (RAND_MAX + 1.0)));
-}
-
-
-int rand_int(int high, int low)
-{
-    return low + (int) ( double(high-low) * (std::rand() / (RAND_MAX + 1.0)));
-}
-
-// ----------------------- saving.cpp ---------------------------
-
-const char FLANN_SIGNATURE_[] = "FLANN_INDEX";
-const char FLANN_VERSION_[] = "1.5.0";
-
-const char* FLANN_SIGNATURE() { return FLANN_SIGNATURE_; }
-const char* FLANN_VERSION() { return FLANN_VERSION_; }
-
-IndexHeader load_header(FILE* stream)
-{
-	IndexHeader header;
-	size_t read_size = fread(&header,sizeof(header),1,stream);
-
-	if (read_size!=1) {
-		throw FLANNException("Invalid index file, cannot read");
-	}
-
-	if (strcmp(header.signature,FLANN_SIGNATURE())!=0) {
-		throw FLANNException("Invalid index file, wrong signature");
-	}
-
-	return header;
-
-}
-
-// ----------------------- flann.cpp ---------------------------
-
-
-void log_verbosity(int level)
-{
-    if (level>=0) {
-        logger().setLevel(level);
-    }
-}
-
-void set_distance_type(flann_distance_t distance_type, int order)
-{
-	flann_distance_type_ = distance_type;
-	flann_minkowski_order_ = order;
-}
-
-
-static ParamsFactory the_factory;
-
-ParamsFactory& ParamsFactory_instance()
-{
-    return the_factory;
-}
-
-class StaticInit
-{
-public:
-	StaticInit()
-	{
-		ParamsFactory_instance().register_<LinearIndexParams>(FLANN_INDEX_LINEAR);
-		ParamsFactory_instance().register_<KDTreeIndexParams>(FLANN_INDEX_KDTREE);
-		ParamsFactory_instance().register_<KMeansIndexParams>(FLANN_INDEX_KMEANS);
-		ParamsFactory_instance().register_<CompositeIndexParams>(FLANN_INDEX_COMPOSITE);
-		ParamsFactory_instance().register_<AutotunedIndexParams>(FLANN_INDEX_AUTOTUNED);
-//		ParamsFactory::instance().register_<SavedIndexParams>(FLANN_INDEX_SAVED);
-	}
-};
-StaticInit __init;
-
-
-} // namespace cvflann
-
-
-

modules/flann/src/miniflann.cpp

@@ -0,0 +1,708 @@
+#include "precomp.hpp"
+
+#define MINIFLANN_SUPPORT_EXOTIC_DISTANCE_TYPES 0
+
+static cvflann::IndexParams& get_params(const cv::flann::IndexParams& p)
+{
+    return *(cvflann::IndexParams*)(p.params);
+}
+
+namespace cv
+{
+    
+namespace flann
+{
+
+IndexParams::IndexParams()
+{
+    params = new ::cvflann::IndexParams();
+}
+    
+IndexParams::~IndexParams()
+{
+    delete &get_params(*this);
+}
+
+template<typename T>
+T getParam(const IndexParams& _p, const std::string& key, const T& defaultVal=T())
+{
+    ::cvflann::IndexParams& p = get_params(_p);
+    ::cvflann::IndexParams::const_iterator it = p.find(key);
+    if( it == p.end() )
+        return defaultVal;
+    return it->second.cast<T>();
+}
+
+template<typename T>
+void setParam(IndexParams& _p, const std::string& key, const T& value)
+{
+    ::cvflann::IndexParams& p = get_params(_p);
+    p[key] = value;
+}    
+    
+std::string IndexParams::getString(const std::string& key, const std::string& defaultVal) const
+{
+    return getParam(*this, key, defaultVal);
+}
+    
+int IndexParams::getInt(const std::string& key, int defaultVal) const
+{
+    return getParam(*this, key, defaultVal);
+}
+    
+double IndexParams::getDouble(const std::string& key, double defaultVal) const
+{
+    return getParam(*this, key, defaultVal);
+}
+
+    
+void IndexParams::setString(const std::string& key, const std::string& value)
+{
+    setParam(*this, key, value);
+}
+
+void IndexParams::setInt(const std::string& key, int value)
+{
+    setParam(*this, key, value);
+}
+
+void IndexParams::setDouble(const std::string& key, double value)
+{
+    setParam(*this, key, value);
+}
+    
+    
+void IndexParams::getAll(std::vector<std::string>& names,
+            std::vector<int>& types,
+            std::vector<std::string>& strValues,
+            std::vector<double>& numValues) const
+{
+    names.clear();
+    types.clear();
+    strValues.clear();
+    numValues.clear();
+    
+    ::cvflann::IndexParams& p = get_params(*this);
+    ::cvflann::IndexParams::const_iterator it = p.begin(), it_end = p.end();
+    
+    for( ; it != it_end; ++it )
+    {
+        names.push_back(it->first);
+        try
+        {
+            std::string val = it->second.cast<std::string>();
+            types.push_back(CV_USRTYPE1);
+            strValues.push_back(val);
+            numValues.push_back(-1);
+        }
+        catch (...)
+        {
+            try
+            {
+                double val = it->second.cast<double>();
+                strValues.push_back(std::string());
+                types.push_back( val == saturate_cast<int>(val) ? CV_32S : CV_64F );
+                numValues.push_back(val);
+            }
+            catch( ... )
+            {
+                types.push_back(-1); // unknown type
+                strValues.push_back(std::string());
+                numValues.push_back(-1);
+            }
+        }
+    }
+}
+    
+    
+KDTreeIndexParams::KDTreeIndexParams(int trees)
+{
+    ::cvflann::IndexParams& p = get_params(*this);
+    p["algorithm"] = FLANN_INDEX_KDTREE;
+    p["trees"] = trees;
+}
+
+LinearIndexParams::LinearIndexParams()
+{
+    ::cvflann::IndexParams& p = get_params(*this);
+    p["algorithm"] = FLANN_INDEX_LINEAR;
+}
+
+CompositeIndexParams::CompositeIndexParams(int trees, int branching, int iterations,
+                             flann_centers_init_t centers_init, float cb_index )
+{
+    ::cvflann::IndexParams& p = get_params(*this);
+    p["algorithm"] = FLANN_INDEX_KMEANS;
+    // number of randomized trees to use (for kdtree)
+    p["trees"] = trees;
+    // branching factor
+    p["branching"] = branching;
+    // max iterations to perform in one kmeans clustering (kmeans tree)
+    p["iterations"] = iterations;
+    // algorithm used for picking the initial cluster centers for kmeans tree
+    p["centers_init"] = centers_init;
+    // cluster boundary index. Used when searching the kmeans tree
+    p["cb_index"] = cb_index;
+}
+    
+AutotunedIndexParams::AutotunedIndexParams(float target_precision, float build_weight,
+                                           float memory_weight, float sample_fraction)
+{
+    ::cvflann::IndexParams& p = get_params(*this);
+    p["algorithm"] = FLANN_INDEX_AUTOTUNED;
+    // precision desired (used for autotuning, -1 otherwise)
+    p["target_precision"] = target_precision;
+    // build tree time weighting factor
+    p["build_weight"] = build_weight;
+    // index memory weighting factor
+    p["memory_weight"] = memory_weight;
+    // what fraction of the dataset to use for autotuning
+    p["sample_fraction"] = sample_fraction;
+}
+    
+
+KMeansIndexParams::KMeansIndexParams(int branching, int iterations,
+                  flann_centers_init_t centers_init, float cb_index )
+{
+    ::cvflann::IndexParams& p = get_params(*this);
+    p["algorithm"] = FLANN_INDEX_KMEANS;
+    // branching factor
+    p["branching"] = branching;
+    // max iterations to perform in one kmeans clustering (kmeans tree)
+    p["iterations"] = iterations;
+    // algorithm used for picking the initial cluster centers for kmeans tree
+    p["centers_init"] = centers_init;
+    // cluster boundary index. Used when searching the kmeans tree
+    p["cb_index"] = cb_index;
+}
+    
+LshIndexParams::LshIndexParams(int table_number, int key_size, int multi_probe_level)
+{
+    ::cvflann::IndexParams& p = get_params(*this);
+    p["algorithm"] = FLANN_INDEX_LSH;
+    // The number of hash tables to use
+    p["table_number"] = (unsigned)table_number;
+    // The length of the key in the hash tables
+    p["key_size"] = (unsigned)key_size;
+    // Number of levels to use in multi-probe (0 for standard LSH)
+    p["multi_probe_level"] = (unsigned)multi_probe_level;
+}    
+    
+SavedIndexParams::SavedIndexParams(const std::string& _filename)
+{
+    std::string filename = _filename;
+    ::cvflann::IndexParams& p = get_params(*this);
+    
+    p["algorithm"] = FLANN_INDEX_SAVED;
+    p["filename"] = filename;
+}
+    
+SearchParams::SearchParams( int checks, float eps, bool sorted )
+{
+    ::cvflann::IndexParams& p = get_params(*this);
+    
+    // how many leafs to visit when searching for neighbours (-1 for unlimited)
+    p["checks"] = checks;
+    // search for eps-approximate neighbours (default: 0)
+    p["eps"] = eps;
+    // only for radius search, require neighbours sorted by distance (default: true)
+    p["sorted"] = sorted;
+}    
+
+    
+template<typename Distance, typename IndexType> void
+buildIndex_(void*& index, const Mat& data, const IndexParams& params, const Distance& dist = Distance())
+{
+    typedef typename Distance::ElementType ElementType;
+    CV_Assert(DataType<ElementType>::type == data.type() && data.isContinuous());
+    
+    ::cvflann::Matrix<ElementType> dataset((ElementType*)data.data, data.rows, data.cols);
+    IndexType* _index = new IndexType(dataset, get_params(params), dist);
+    _index->buildIndex();
+    index = _index;
+}
+
+template<typename Distance> void
+buildIndex(void*& index, const Mat& data, const IndexParams& params, const Distance& dist = Distance())
+{
+    buildIndex_<Distance, ::cvflann::Index<Distance> >(index, data, params, dist);
+}
+
+typedef ::cvflann::HammingLUT HammingDistance;
+typedef ::cvflann::LshIndex<HammingDistance> LshIndex;
+
+Index::Index()
+{
+    index = 0;
+    featureType = CV_32F;
+    algo = FLANN_INDEX_LINEAR;
+    distType = FLANN_DIST_L2;
+}
+    
+Index::Index(InputArray _data, const IndexParams& params, flann_distance_t _distType)
+{
+    index = 0;
+    featureType = CV_32F;
+    algo = FLANN_INDEX_LINEAR;
+    distType = FLANN_DIST_L2;
+    build(_data, params, _distType);
+}
+    
+void Index::build(InputArray _data, const IndexParams& params, flann_distance_t _distType)
+{
+    release();
+    algo = getParam<flann_algorithm_t>(params, "algorithm", FLANN_INDEX_LINEAR);
+    if( algo == FLANN_INDEX_SAVED )
+    {
+        load(_data, getParam<std::string>(params, "filename", std::string()));
+        return;
+    }
+    
+    Mat data = _data.getMat();
+    index = 0;
+    featureType = data.type();
+    distType = _distType;
+
+    if( algo == FLANN_INDEX_LSH )
+    {
+        buildIndex_<HammingDistance, LshIndex>(index, data, params);
+        return;
+    }
+    
+    switch( distType )
+    {
+    case FLANN_DIST_L2:
+        buildIndex< ::cvflann::L2<float> >(index, data, params);
+        break;
+    case FLANN_DIST_L1:
+        buildIndex< ::cvflann::L1<float> >(index, data, params);
+        break;
+#if MINIFLANN_SUPPORT_EXOTIC_DISTANCE_TYPES
+    case FLANN_DIST_MAX:
+        buildIndex< ::cvflann::MaxDistance<float> >(index, data, params);
+        break;
+    case FLANN_DIST_HIST_INTERSECT:
+        buildIndex< ::cvflann::HistIntersectionDistance<float> >(index, data, params);
+        break;
+    case FLANN_DIST_HELLINGER:
+        buildIndex< ::cvflann::HellingerDistance<float> >(index, data, params);
+        break;
+    case FLANN_DIST_CHI_SQUARE:
+        buildIndex< ::cvflann::ChiSquareDistance<float> >(index, data, params);
+        break;
+    case FLANN_DIST_KL:
+        buildIndex< ::cvflann::KL_Divergence<float> >(index, data, params);
+        break;
+#endif
+    default:
+        CV_Error(CV_StsBadArg, "Unknown/unsupported distance type");
+    }
+}
+
+template<typename IndexType> void deleteIndex_(void* index)
+{
+    delete (IndexType*)index;
+}
+
+template<typename Distance> void deleteIndex(void* index)
+{
+    deleteIndex_< ::cvflann::Index<Distance> >(index);
+}
+    
+Index::~Index()
+{
+    release();
+}
+    
+void Index::release()
+{
+    if( !index )
+        return;
+    if( algo == FLANN_INDEX_LSH )
+    {
+        deleteIndex_<LshIndex>(index);
+    }
+    else
+    {
+        CV_Assert( featureType == CV_32F );
+        switch( distType )
+        {
+        case FLANN_DIST_L2:
+            deleteIndex< ::cvflann::L2<float> >(index);
+            break;
+        case FLANN_DIST_L1:
+            deleteIndex< ::cvflann::L1<float> >(index);
+            break;
+#if MINIFLANN_SUPPORT_EXOTIC_DISTANCE_TYPES
+        case FLANN_DIST_MAX:
+            deleteIndex< ::cvflann::MaxDistance<float> >(index);
+            break;
+        case FLANN_DIST_HIST_INTERSECT:
+            deleteIndex< ::cvflann::HistIntersectionDistance<float> >(index);
+            break;
+        case FLANN_DIST_HELLINGER:
+            deleteIndex< ::cvflann::HellingerDistance<float> >(index);
+            break;
+        case FLANN_DIST_CHI_SQUARE:
+            deleteIndex< ::cvflann::ChiSquareDistance<float> >(index);
+            break;
+        case FLANN_DIST_KL:
+            deleteIndex< ::cvflann::KL_Divergence<float> >(index);
+            break;
+#endif
+        default:
+            CV_Error(CV_StsBadArg, "Unknown/unsupported distance type");
+        }
+    }
+    index = 0;
+}
+
+template<typename Distance, typename IndexType>
+void runKnnSearch_(void* index, const Mat& query, Mat& indices, Mat& dists,
+                  int knn, const SearchParams& params)
+{
+    typedef typename Distance::ElementType ElementType;
+    typedef typename Distance::ResultType DistanceType;
+    int type = DataType<ElementType>::type;
+    int dtype = DataType<DistanceType>::type;
+    CV_Assert(query.type() == type && indices.type() == CV_32S && dists.type() == dtype);
+    CV_Assert(query.isContinuous() && indices.isContinuous() && dists.isContinuous());
+    
+    ::cvflann::Matrix<ElementType> _query((ElementType*)query.data, query.rows, query.cols);
+    ::cvflann::Matrix<int> _indices((int*)indices.data, indices.rows, indices.cols);
+    ::cvflann::Matrix<DistanceType> _dists((DistanceType*)dists.data, dists.rows, dists.cols);
+    
+    ((IndexType*)index)->knnSearch(_query, _indices, _dists, knn,
+                                   (const ::cvflann::SearchParams&)get_params(params));
+}
+    
+template<typename Distance>
+void runKnnSearch(void* index, const Mat& query, Mat& indices, Mat& dists,
+                  int knn, const SearchParams& params)
+{
+    runKnnSearch_<Distance, ::cvflann::Index<Distance> >(index, query, indices, dists, knn, params);
+}
+
+template<typename Distance, typename IndexType>
+int runRadiusSearch_(void* index, const Mat& query, Mat& indices, Mat& dists,
+                    double radius, const SearchParams& params)
+{
+    typedef typename Distance::ElementType ElementType;
+    typedef typename Distance::ResultType DistanceType;
+    int type = DataType<ElementType>::type;
+    int dtype = DataType<DistanceType>::type;
+    CV_Assert(query.type() == type && indices.type() == CV_32S && dists.type() == dtype);
+    CV_Assert(query.isContinuous() && indices.isContinuous() && dists.isContinuous());
+    
+    ::cvflann::Matrix<ElementType> _query((ElementType*)query.data, query.rows, query.cols);
+    ::cvflann::Matrix<int> _indices((int*)indices.data, indices.rows, indices.cols);
+    ::cvflann::Matrix<DistanceType> _dists((DistanceType*)dists.data, dists.rows, dists.cols);
+    
+    return ((IndexType*)index)->radiusSearch(_query, _indices, _dists,
+                                            saturate_cast<DistanceType>(radius),
+                                            (const ::cvflann::SearchParams&)get_params(params));
+}
+
+template<typename Distance>
+int runRadiusSearch(void* index, const Mat& query, Mat& indices, Mat& dists,
+                     double radius, const SearchParams& params)
+{
+    return runRadiusSearch_<Distance, ::cvflann::Index<Distance> >(index, query, indices, dists, radius, params);
+}
+        
+    
+static void createIndicesDists(OutputArray _indices, OutputArray _dists,
+                               Mat& indices, Mat& dists, int rows,
+                               int minCols, int maxCols, int dtype)
+{
+    if( _indices.needed() )
+    {
+        indices = _indices.getMat();
+        if( !indices.isContinuous() || indices.type() != CV_32S ||
+            indices.rows != rows || indices.cols < minCols || indices.cols > maxCols )
+        {
+            if( !indices.isContinuous() )
+               _indices.release();
+            _indices.create( rows, minCols, CV_32S );
+            indices = _indices.getMat();
+        }
+    }
+    else
+        indices.create( rows, minCols, CV_32S );
+    
+    if( _dists.needed() )
+    {
+        dists = _dists.getMat();
+        if( !dists.isContinuous() || dists.type() != dtype ||
+           dists.rows != rows || dists.cols < minCols || dists.cols > maxCols )
+        {
+            if( !indices.isContinuous() )
+                _dists.release();
+            _dists.create( rows, minCols, dtype );
+            dists = _dists.getMat();
+        }
+    }
+    else
+        dists.create( rows, minCols, dtype );
+}
+
+    
+void Index::knnSearch(InputArray _query, OutputArray _indices, 
+               OutputArray _dists, int knn, const SearchParams& params)
+{
+    Mat query = _query.getMat(), indices, dists;
+    int dtype = algo == FLANN_INDEX_LSH ? CV_32S : CV_32F;
+    
+    createIndicesDists( _indices, _dists, indices, dists, query.rows, knn, knn, dtype );
+    
+    if( algo == FLANN_INDEX_LSH )
+    {
+        runKnnSearch_<HammingDistance, LshIndex>(index, query, indices, dists, knn, params);
+        return;
+    }
+    
+    switch( distType )
+    {
+    case FLANN_DIST_L2:
+        runKnnSearch< ::cvflann::L2<float> >(index, query, indices, dists, knn, params);
+        break;
+    case FLANN_DIST_L1:
+        runKnnSearch< ::cvflann::L1<float> >(index, query, indices, dists, knn, params);
+        break;
+#if MINIFLANN_SUPPORT_EXOTIC_DISTANCE_TYPES
+    case FLANN_DIST_MAX:
+        runKnnSearch< ::cvflann::MaxDistance<float> >(index, query, indices, dists, knn, params);
+        break;
+    case FLANN_DIST_HIST_INTERSECT:
+        runKnnSearch< ::cvflann::HistIntersectionDistance<float> >(index, query, indices, dists, knn, params);
+        break;
+    case FLANN_DIST_HELLINGER:
+        runKnnSearch< ::cvflann::HellingerDistance<float> >(index, query, indices, dists, knn, params);
+        break;
+    case FLANN_DIST_CHI_SQUARE:
+        runKnnSearch< ::cvflann::ChiSquareDistance<float> >(index, query, indices, dists, knn, params);
+        break;
+    case FLANN_DIST_KL:
+        runKnnSearch< ::cvflann::KL_Divergence<float> >(index, query, indices, dists, knn, params);
+        break;
+#endif
+    default:
+        CV_Error(CV_StsBadArg, "Unknown/unsupported distance type");
+    }
+}
+        
+int Index::radiusSearch(InputArray _query, OutputArray _indices,
+                        OutputArray _dists, double radius, int maxResults,
+                        const SearchParams& params)
+{
+    Mat query = _query.getMat(), indices, dists;
+    int dtype = algo == FLANN_INDEX_LSH ? CV_32S : CV_32F;
+    CV_Assert( maxResults > 0 );
+    createIndicesDists( _indices, _dists, indices, dists, query.rows, maxResults, INT_MAX, dtype );
+    
+    if( algo == FLANN_INDEX_LSH )
+        CV_Error( CV_StsNotImplemented, "LSH index does not support radiusSearch operation" );
+    
+    switch( distType )
+    {
+    case FLANN_DIST_L2:
+        return runRadiusSearch< ::cvflann::L2<float> >(index, query, indices, dists, radius, params);
+    case FLANN_DIST_L1:
+        return runRadiusSearch< ::cvflann::L1<float> >(index, query, indices, dists, radius, params);
+#if MINIFLANN_SUPPORT_EXOTIC_DISTANCE_TYPES
+    case FLANN_DIST_MAX:
+        return runRadiusSearch< ::cvflann::MaxDistance<float> >(index, query, indices, dists, radius, params);
+    case FLANN_DIST_HIST_INTERSECT:
+        return runRadiusSearch< ::cvflann::HistIntersectionDistance<float> >(index, query, indices, dists, radius, params);
+    case FLANN_DIST_HELLINGER:
+        return runRadiusSearch< ::cvflann::HellingerDistance<float> >(index, query, indices, dists, radius, params);
+    case FLANN_DIST_CHI_SQUARE:
+        return runRadiusSearch< ::cvflann::ChiSquareDistance<float> >(index, query, indices, dists, radius, params);
+    case FLANN_DIST_KL:
+        return runRadiusSearch< ::cvflann::KL_Divergence<float> >(index, query, indices, dists, radius, params);
+#endif
+    default:
+        CV_Error(CV_StsBadArg, "Unknown/unsupported distance type");
+    }
+    return -1;
+}
+
+flann_distance_t Index::getDistance() const
+{
+    return distType;
+}
+    
+flann_algorithm_t Index::getAlgorithm() const
+{
+    return algo;
+}
+
+template<typename IndexType> void saveIndex_(const Index* index0, const void* index, FILE* fout)
+{
+    IndexType* _index = (IndexType*)index;
+    ::cvflann::save_header(fout, *_index);
+    // some compilers may store short enumerations as bytes,
+    // so make sure we always write integers (which are 4-byte values in any modern C compiler)
+    int idistType = (int)index0->getDistance();
+    ::cvflann::save_value<int>(fout, idistType);
+    _index->saveIndex(fout);
+}
+
+template<typename Distance> void saveIndex(const Index* index0, const void* index, FILE* fout)
+{
+    saveIndex_< ::cvflann::Index<Distance> >(index0, index, fout);
+}   
+    
+void Index::save(const std::string& filename) const
+{
+    FILE* fout = fopen(filename.c_str(), "wb");
+    if (fout == NULL)
+        CV_Error_( CV_StsError, ("Can not open file %s for writing FLANN index\n", filename.c_str()) );
+    
+    if( algo == FLANN_INDEX_LSH )
+    {
+        saveIndex_<LshIndex>(this, index, fout);
+        return;
+    }
+    
+    switch( distType )
+    {
+    case FLANN_DIST_L2:
+        saveIndex< ::cvflann::L2<float> >(this, index, fout);
+        break;
+    case FLANN_DIST_L1:
+        saveIndex< ::cvflann::L1<float> >(this, index, fout);
+        break;
+#if MINIFLANN_SUPPORT_EXOTIC_DISTANCE_TYPES
+    case FLANN_DIST_MAX:
+        saveIndex< ::cvflann::MaxDistance<float> >(this, index, fout);
+        break;
+    case FLANN_DIST_HIST_INTERSECT:
+        saveIndex< ::cvflann::HistIntersectionDistance<float> >(this, index, fout);
+        break;
+    case FLANN_DIST_HELLINGER:
+        saveIndex< ::cvflann::HellingerDistance<float> >(this, index, fout);
+        break;
+    case FLANN_DIST_CHI_SQUARE:
+        saveIndex< ::cvflann::ChiSquareDistance<float> >(this, index, fout);
+        break;
+    case FLANN_DIST_KL:
+        saveIndex< ::cvflann::KL_Divergence<float> >(this, index, fout);
+        break;
+#endif
+    default:
+        fclose(fout);
+        fout = 0;
+        CV_Error(CV_StsBadArg, "Unknown/unsupported distance type");
+    }
+    if( fout )
+        fclose(fout);
+}
+
+
+template<typename Distance, typename IndexType>
+bool loadIndex_(Index* index0, void*& index, const Mat& data, FILE* fin, const Distance& dist=Distance())
+{
+    typedef typename Distance::ElementType ElementType;
+    CV_Assert(DataType<ElementType>::type == data.type() && data.isContinuous());
+    
+    ::cvflann::Matrix<ElementType> dataset((ElementType*)data.data, data.rows, data.cols);
+    
+    ::cvflann::IndexParams params;
+    params["algorithm"] = index0->getAlgorithm();
+    IndexType* _index = new IndexType(dataset, params, dist);
+    _index->loadIndex(fin);
+    index = _index;
+    return true;
+}
+
+template<typename Distance>
+bool loadIndex(Index* index0, void*& index, const Mat& data, FILE* fin, const Distance& dist=Distance())
+{
+    return loadIndex_<Distance, ::cvflann::Index<Distance> >(index0, index, data, fin, dist);
+}    
+    
+bool Index::load(InputArray _data, const std::string& filename)
+{
+    Mat data = _data.getMat();
+    bool ok = true;
+    release();
+    FILE* fin = fopen(filename.c_str(), "rb");
+    if (fin == NULL)
+        return false;
+    
+    ::cvflann::IndexHeader header = ::cvflann::load_header(fin);
+    algo = header.index_type;
+    featureType = header.data_type == FLANN_UINT8 ? CV_8U :
+                  header.data_type == FLANN_INT8 ? CV_8S :
+                  header.data_type == FLANN_UINT16 ? CV_16U :
+                  header.data_type == FLANN_INT16 ? CV_16S :
+                  header.data_type == FLANN_INT32 ? CV_32S :
+                  header.data_type == FLANN_FLOAT32 ? CV_32F :
+                  header.data_type == FLANN_FLOAT64 ? CV_64F : -1;
+    
+    if( (int)header.rows != data.rows || (int)header.cols != data.cols ||
+        featureType != data.type() )
+    {
+        fprintf(stderr, "Reading FLANN index error: the saved data size (%d, %d) or type (%d) is different from the passed one (%d, %d), %d\n",
+                (int)header.rows, (int)header.cols, featureType, data.rows, data.cols, data.type());
+        fclose(fin);
+        return false;
+    }
+    
+    if( !((algo == FLANN_INDEX_LSH && featureType == CV_8U) ||
+          (algo != FLANN_INDEX_LSH && featureType == CV_32F)) )
+    {
+        fprintf(stderr, "Reading FLANN index error: unsupported feature type %d for the index type %d\n", featureType, algo);
+        fclose(fin);
+        return false;
+    }
+    int idistType = 0;
+    ::cvflann::load_value(fin, idistType);
+    distType = (flann_distance_t)idistType;
+    
+    if( algo == FLANN_INDEX_LSH )
+    {
+        loadIndex_<HammingDistance, LshIndex>(this, index, data, fin);
+    }
+    else
+    {
+        switch( distType )
+        {
+        case FLANN_DIST_L2:
+            loadIndex< ::cvflann::L2<float> >(this, index, data, fin);
+            break;
+        case FLANN_DIST_L1:
+            loadIndex< ::cvflann::L1<float> >(this, index, data, fin);
+            break;
+    #if MINIFLANN_SUPPORT_EXOTIC_DISTANCE_TYPES
+        case FLANN_DIST_MAX:
+            loadIndex< ::cvflann::MaxDistance<float> >(this, index, data, fin);
+            break;
+        case FLANN_DIST_HIST_INTERSECT:
+            loadIndex< ::cvflann::HistIntersectionDistance<float> >(index, data, fin);
+            break;
+        case FLANN_DIST_HELLINGER:
+            loadIndex< ::cvflann::HellingerDistance<float> >(this, index, data, fin);
+            break;
+        case FLANN_DIST_CHI_SQUARE:
+            loadIndex< ::cvflann::ChiSquareDistance<float> >(this, index, data, fin);
+            break;
+        case FLANN_DIST_KL:
+            loadIndex< ::cvflann::KL_Divergence<float> >(this, index, data, fin);
+            break;
+    #endif
+        default:
+            fprintf(stderr, "Reading FLANN index error: unsupported distance type %d\n", distType);
+            ok = false;
+        }
+    }
+    
+    if( fin )
+        fclose(fin);
+    return ok;
+}
+    
+}
+    
+}

modules/flann/src/precomp.hpp

@@ -5,10 +5,13 @@
 #include <cstdarg>
 #include <sstream>
 
+#include "opencv2/flann/miniflann.hpp"
 #include "opencv2/flann/dist.h"
 #include "opencv2/flann/index_testing.h"
+#include "opencv2/flann/params.h"
 #include "opencv2/flann/saving.h"
 #include "opencv2/flann/general.h"
+#include "opencv2/flann/dummy.h"
 
 // index types
 #include "opencv2/flann/all_indices.h"

modules/python/CMakeLists.txt

@@ -7,6 +7,7 @@ include_directories(${PYTHON_INCLUDE_PATH})
 include_directories(
     "${CMAKE_CURRENT_SOURCE_DIR}/src2"
     "${OpenCV_SOURCE_DIR}/modules/core/include"
+    "${OpenCV_SOURCE_DIR}/modules/flann/include"
     "${OpenCV_SOURCE_DIR}/modules/imgproc/include"
     "${OpenCV_SOURCE_DIR}/modules/video/include"
     "${OpenCV_SOURCE_DIR}/modules/highgui/include"
@@ -22,6 +23,7 @@ include_directories(
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 
 set(opencv_hdrs "${OpenCV_SOURCE_DIR}/modules/core/include/opencv2/core/core.hpp"
+    "${OpenCV_SOURCE_DIR}/modules/flann/include/opencv2/flann/miniflann.hpp"
     "${OpenCV_SOURCE_DIR}/modules/imgproc/include/opencv2/imgproc/imgproc.hpp"
     "${OpenCV_SOURCE_DIR}/modules/video/include/opencv2/video/background_segm.hpp"
     "${OpenCV_SOURCE_DIR}/modules/video/include/opencv2/video/tracking.hpp"
@@ -61,7 +63,7 @@ add_custom_command(
 
 set(cv2_target "opencv_python")
 add_library(${cv2_target} SHARED src2/cv2.cpp ${CMAKE_CURRENT_BINARY_DIR}/generated0.i src2/opencv_extra_api.hpp ${cv2_generated_hdrs} src2/cv2.cv.hpp)
-target_link_libraries(${cv2_target} ${PYTHON_LIBRARIES} opencv_core opencv_imgproc opencv_video opencv_ml opencv_features2d opencv_highgui opencv_calib3d opencv_objdetect opencv_legacy opencv_contrib)
+target_link_libraries(${cv2_target} ${PYTHON_LIBRARIES} opencv_core opencv_flann opencv_imgproc opencv_video opencv_ml opencv_features2d opencv_highgui opencv_calib3d opencv_objdetect opencv_legacy opencv_contrib)
     
 set_target_properties(${cv2_target} PROPERTIES PREFIX "")
 set_target_properties(${cv2_target} PROPERTIES OUTPUT_NAME "cv2")

modules/python/src2/cv2.cpp

@@ -9,6 +9,7 @@
 #include "numpy/ndarrayobject.h"
 
 #include "opencv2/core/core.hpp"
+#include "opencv2/flann/miniflann.hpp"
 #include "opencv2/imgproc/imgproc.hpp"
 #include "opencv2/calib3d/calib3d.hpp"
 #include "opencv2/ml/ml.hpp"
@@ -19,6 +20,9 @@
 #include "opencv2/highgui/highgui.hpp"
 #include "opencv_extra_api.hpp"
 
+using cv::flann::IndexParams;
+using cv::flann::SearchParams;
+
 static PyObject* opencv_error = 0;
 
 static int failmsg(const char *fmt, ...)
@@ -735,6 +739,46 @@ static inline PyObject* pyopencv_from(const CvDTreeNode* node)
     return value == ivalue ? PyInt_FromLong(ivalue) : PyFloat_FromDouble(value);
 }
 
+static bool pyopencv_to(PyObject *o, cv::flann::IndexParams& p, const char *name="<unknown>")
+{
+    bool ok = false;
+    PyObject* keys = PyMapping_Keys(o);
+    PyObject* values = PyMapping_Values(o);
+    
+    if( keys && values )
+    {
+        int i, n = (int)PyList_GET_SIZE(keys);
+        for( i = 0; i < n; i++ )
+        {
+            PyObject* key = PyList_GET_ITEM(keys, i);
+            PyObject* item = PyList_GET_ITEM(values, i);
+            if( !PyString_Check(key) )
+                break;
+            std::string k = PyString_AsString(key);
+            if( PyString_Check(item) )
+                p.setString(k, PyString_AsString(item));
+            else if( PyInt_Check(item) )
+                p.setInt(k, PyInt_AsLong(item));
+            else if( PyFloat_Check(item) )
+                p.setDouble(k, PyFloat_AsDouble(item));
+            else
+                break;
+        }
+        ok = i == n && !PyErr_Occurred();
+    }
+    
+    Py_XDECREF(keys);
+    Py_XDECREF(values);
+    return ok;
+}
+
+static bool pyopencv_to(PyObject *o, flann_distance_t& dist, const char *name="<unknown>")
+{
+    int d = 0;
+    bool ok = pyopencv_to(o, d, name);
+    dist = (flann_distance_t)d;
+    return ok;
+}
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 

modules/python/src2/gen2.py

@@ -164,6 +164,9 @@ simple_argtype_mapping = {
     "c_string": ("char*", "s", '(char*)""')
 }
 
+def normalize_class_name(name):
+    return re.sub(r"^cv\.", "", name).replace(".", "_")
+
 class ClassProp(object):
     def __init__(self, decl):
         self.tp = decl[0].replace("*", "_ptr")
@@ -175,7 +178,7 @@ class ClassProp(object):
 class ClassInfo(object):
     def __init__(self, name, decl=None):
         self.cname = name.replace(".", "::")
-        self.name = self.wname = re.sub(r"^cv\.", "", name)
+        self.name = self.wname = normalize_class_name(name)
         self.ismap = False
         self.issimple = False
         self.methods = {}
@@ -300,8 +303,12 @@ class FuncVariant(object):
         self.classname = classname
         self.name = self.wname = name
         self.isconstructor = isconstructor
-        if self.isconstructor and self.wname.startswith("Cv"):
+        if self.isconstructor:
-            self.wname = self.wname[2:]
+            if self.wname.startswith("Cv"):
+                self.wname = self.wname[2:]
+            else:
+                self.wname = self.classname
+            
         self.rettype = decl[1]
         if self.rettype == "void":
             self.rettype = ""
@@ -446,7 +453,7 @@ class FuncInfo(object):
             s = self.variants[idx].py_docstring
             p1 = s.find("(")
             p2 = s.rfind(")")
-            docstring_list = [s[:p1+1] + "[" + s[p1+2:p2] + "]" + s[p2:]]
+            docstring_list = [s[:p1+1] + "[" + s[p1+1:p2] + "]" + s[p2:]]
             
         return Template('    {"$py_funcname", (PyCFunction)$wrap_funcname, METH_KEYWORDS, "$py_docstring"},\n'
                         ).substitute(py_funcname = self.variants[0].wname, wrap_funcname=self.get_wrapper_name(),
@@ -643,15 +650,19 @@ class PythonWrapperGenerator(object):
         self.consts[constinfo.name] = constinfo
 
     def add_func(self, decl):
-        classname = ""
+        classname = bareclassname = ""
         name = decl[0]
         dpos = name.rfind(".")
         if dpos >= 0 and name[:dpos] != "cv":
-            classname = re.sub(r"^cv\.", "", name[:dpos])
+            classname = bareclassname = re.sub(r"^cv\.", "", name[:dpos])
             name = name[dpos+1:]
+            dpos = classname.rfind(".")
+            if dpos >= 0:
+                bareclassname = classname[dpos+1:]
+                classname = classname.replace(".", "_")
         cname = name
         name = re.sub(r"^cv\.", "", name)
-        isconstructor = cname == classname
+        isconstructor = cname == bareclassname
         cname = cname.replace(".", "::")
         isclassmethod = False
         customname = False

modules/python/src2/hdr_parser.py

@@ -3,6 +3,7 @@ import os, sys, re, string
 # the list only for debugging. The real list, used in the real OpenCV build, is specified in CMakeLists.txt
 opencv_hdr_list = [
 "../../core/include/opencv2/core/core.hpp",
+"../../flann/include/opencv2/flann/miniflann.hpp",
 "../../ml/include/opencv2/ml/ml.hpp",
 "../../imgproc/include/opencv2/imgproc/imgproc.hpp",
 "../../calib3d/include/opencv2/calib3d/calib3d.hpp",

samples/cpp/fback.cpp

@@ -10,7 +10,7 @@ using namespace std;
 void help()
 {
 	cout <<
-			"\nThis program demonstrates dense, Farnback, optical flow\n"
+			"\nThis program demonstrates dense optical flow algorithm by Gunnar Farneback\n"
 			"Mainly the function: calcOpticalFlowFarneback()\n"
 			"Call:\n"
 			"./fback\n"

samples/cpp/image.cpp

@@ -3,7 +3,7 @@
 #include "ml.h"
 #include <stdio.h>
 #include <iostream>
-#include "opencv2/flann/flann.hpp"
+#include "opencv2/flann/miniflann.hpp"
 
 using namespace cv; // all the new API is put into "cv" namespace. Export its content
 using namespace std;