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      1 /*M///////////////////////////////////////////////////////////////////////////////////////
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     43 
     44 #ifndef __OPENCV_HIST_COST_HPP__
     45 #define __OPENCV_HIST_COST_HPP__
     46 
     47 #include "opencv2/imgproc.hpp"
     48 
     49 namespace cv
     50 {
     51 
     52 //! @addtogroup shape
     53 //! @{
     54 
     55 /** @brief Abstract base class for histogram cost algorithms.
     56  */
     57 class CV_EXPORTS_W HistogramCostExtractor : public Algorithm
     58 {
     59 public:
     60     CV_WRAP virtual void buildCostMatrix(InputArray descriptors1, InputArray descriptors2, OutputArray costMatrix) = 0;
     61 
     62     CV_WRAP virtual void setNDummies(int nDummies) = 0;
     63     CV_WRAP virtual int getNDummies() const = 0;
     64 
     65     CV_WRAP virtual void setDefaultCost(float defaultCost) = 0;
     66     CV_WRAP virtual float getDefaultCost() const = 0;
     67 };
     68 
     69 /** @brief A norm based cost extraction. :
     70  */
     71 class CV_EXPORTS_W NormHistogramCostExtractor : public HistogramCostExtractor
     72 {
     73 public:
     74     CV_WRAP virtual void setNormFlag(int flag) = 0;
     75     CV_WRAP virtual int getNormFlag() const = 0;
     76 };
     77 
     78 CV_EXPORTS_W Ptr<HistogramCostExtractor>
     79     createNormHistogramCostExtractor(int flag=DIST_L2, int nDummies=25, float defaultCost=0.2f);
     80 
     81 /** @brief An EMD based cost extraction. :
     82  */
     83 class CV_EXPORTS_W EMDHistogramCostExtractor : public HistogramCostExtractor
     84 {
     85 public:
     86     CV_WRAP virtual void setNormFlag(int flag) = 0;
     87     CV_WRAP virtual int getNormFlag() const = 0;
     88 };
     89 
     90 CV_EXPORTS_W Ptr<HistogramCostExtractor>
     91     createEMDHistogramCostExtractor(int flag=DIST_L2, int nDummies=25, float defaultCost=0.2f);
     92 
     93 /** @brief An Chi based cost extraction. :
     94  */
     95 class CV_EXPORTS_W ChiHistogramCostExtractor : public HistogramCostExtractor
     96 {};
     97 
     98 CV_EXPORTS_W Ptr<HistogramCostExtractor> createChiHistogramCostExtractor(int nDummies=25, float defaultCost=0.2f);
     99 
    100 /** @brief An EMD-L1 based cost extraction. :
    101  */
    102 class CV_EXPORTS_W EMDL1HistogramCostExtractor : public HistogramCostExtractor
    103 {};
    104 
    105 CV_EXPORTS_W Ptr<HistogramCostExtractor>
    106     createEMDL1HistogramCostExtractor(int nDummies=25, float defaultCost=0.2f);
    107 
    108 //! @}
    109 
    110 } // cv
    111 #endif
    112