opencv/modules/stitching/blenders.hpp
2011-05-25 13:14:56 +00:00

115 lines
4.2 KiB
C++

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#ifndef __OPENCV_BLENDERS_HPP__
#define __OPENCV_BLENDERS_HPP__
#include "precomp.hpp"
// Simple blender which puts one image over another
class Blender
{
public:
enum { NO, FEATHER, MULTI_BAND };
static cv::Ptr<Blender> createDefault(int type);
void prepare(const std::vector<cv::Point> &corners, const std::vector<cv::Size> &sizes);
virtual void prepare(cv::Rect dst_roi);
virtual void feed(const cv::Mat &img, const cv::Mat &mask, cv::Point tl);
virtual void blend(cv::Mat &dst, cv::Mat &dst_mask);
protected:
cv::Mat dst_, dst_mask_;
cv::Rect dst_roi_;
};
class FeatherBlender : public Blender
{
public:
FeatherBlender(float sharpness = 0.02f) { setSharpness(sharpness); }
float sharpness() const { return sharpness_; }
void setSharpness(float val) { sharpness_ = val; }
void prepare(cv::Rect dst_roi);
void feed(const cv::Mat &img, const cv::Mat &mask, cv::Point tl);
void blend(cv::Mat &dst, cv::Mat &dst_mask);
private:
float sharpness_;
cv::Mat weight_map_;
cv::Mat dst_weight_map_;
};
class MultiBandBlender : public Blender
{
public:
MultiBandBlender(int num_bands = 5) { setNumBands(num_bands); }
int numBands() const { return actual_num_bands_; }
void setNumBands(int val) { actual_num_bands_ = val; }
void prepare(cv::Rect dst_roi);
void feed(const cv::Mat &img, const cv::Mat &mask, cv::Point tl);
void blend(cv::Mat &dst, cv::Mat &dst_mask);
private:
int actual_num_bands_, num_bands_;
std::vector<cv::Mat> dst_pyr_laplace_;
std::vector<cv::Mat> dst_band_weights_;
cv::Rect dst_roi_final_;
};
//////////////////////////////////////////////////////////////////////////////
// Auxiliary functions
void normalize(const cv::Mat& weight, cv::Mat& src);
void createWeightMap(const cv::Mat& mask, float sharpness, cv::Mat& weight);
void createLaplacePyr(const std::vector<cv::Mat>& pyr_gauss, std::vector<cv::Mat>& pyr_laplace);
// Restores source image in-place (result will be stored in pyr[0])
void restoreImageFromLaplacePyr(std::vector<cv::Mat>& pyr);
#endif // __OPENCV_BLENDERS_HPP__