opencv/modules/gpu/src/imgproc_gpu.cpp

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#include "precomp.hpp"

using namespace cv;
using namespace cv::gpu;

#if !defined (HAVE_CUDA)

void cv::gpu::remap(const GpuMat&, const GpuMat&, const GpuMat&, GpuMat&) { throw_nogpu(); }
void cv::gpu::meanShiftFiltering_GPU(const GpuMat&, GpuMat&, int, int, TermCriteria ) { throw_nogpu(); }
void cv::gpu::colorizeDisp(const GpuMat&, GpuMat&, int) { throw_nogpu(); }

#else /* !defined (HAVE_CUDA) */

namespace cv { namespace gpu 
{ 
    namespace impl 
    {
        extern "C" void remap_gpu(const DevMem2D& src, const DevMem2D_<float>& xmap, const DevMem2D_<float>& ymap, DevMem2D dst);

        extern "C" void meanShiftFiltering_gpu(const DevMem2D& src, DevMem2D dst, int sp, int sr, int maxIter, float eps);

        void colorizeDisp_gpu(const DevMem2D& src, const DevMem2D& dst, int ndisp);
        void colorizeDisp_gpu(const DevMem2D_<short>& src, const DevMem2D& dst, int ndisp);
    }
}}

void cv::gpu::remap(const GpuMat& src, const GpuMat& xmap, const GpuMat& ymap, GpuMat& dst)
{ 
    CV_DbgAssert(xmap.data && xmap.cols == ymap.cols && xmap.rows == ymap.rows);
    CV_Assert(xmap.type() == CV_32F && ymap.type() == CV_32F);

    dst.create(xmap.size(), src.type());
    CV_Assert(dst.data != src.data);   
    
    impl::remap_gpu(src, xmap, ymap, dst);
}



void cv::gpu::meanShiftFiltering_GPU(const GpuMat& src, GpuMat& dst, int sp, int sr, TermCriteria criteria)
{       
    if( src.empty() )
        CV_Error( CV_StsBadArg, "The input image is empty" );

    if( src.depth() != CV_8U || src.channels() != 4 )
        CV_Error( CV_StsUnsupportedFormat, "Only 8-bit, 4-channel images are supported" );

    dst.create( src.size(), CV_8UC3 );
    
    float eps;
    if( !(criteria.type & TermCriteria::MAX_ITER) )
        criteria.maxCount = 5;
    
    int maxIter = std::min(std::max(criteria.maxCount, 1), 100);
    
    if( !(criteria.type & TermCriteria::EPS) )
        eps = 1.f;

    eps = (float)std::max(criteria.epsilon, 0.0);        
    impl::meanShiftFiltering_gpu(src, dst, sp, sr, maxIter, eps);    
}

namespace
{
    template <typename T>
    void colorizeDisp_caller(const GpuMat& src, GpuMat& dst, int ndisp)
    {
        impl::colorizeDisp_gpu((DevMem2D_<T>)src, dst, ndisp);
    }
}

void cv::gpu::colorizeDisp(const GpuMat& src, GpuMat& dst, int ndisp)
{
    typedef void (*colorizeDisp_caller_t)(const GpuMat& src, GpuMat& dst, int ndisp);

    static const colorizeDisp_caller_t callers[] = {colorizeDisp_caller<uchar>, 0, 0, colorizeDisp_caller<short>, 0, 0, 0, 0};
    CV_Assert(src.type() == CV_8U || src.type() == CV_16S);

    GpuMat out;
    if (&dst != &src)
        out = dst;
    out.create(src.size(), CV_8UC4);
    
    callers[src.type()](src, out, ndisp);
    dst = out;
}

#endif /* !defined (HAVE_CUDA) */