pcaflow.hpp

[詳解]

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#ifndef __OPENCV_OPTFLOW_PCAFLOW_HPP__
#define __OPENCV_OPTFLOW_PCAFLOW_HPP__
 
#include "opencv2/core.hpp"
#include "opencv2/video.hpp"
 
namespace cv
{
namespace optflow
{
 
 
class CV_EXPORTS_W PCAPrior
{
private:
  Mat L1;
  Mat L2;
  Mat c1;
  Mat c2;
 
public:
  PCAPrior( const char *pathToPrior );
 
  int getPadding() const { return L1.size().height; }
 
  int getBasisSize() const { return L1.size().width; }
 
  void fillConstraints( float *A1, float *A2, float *b1, float *b2 ) const;
};
 
class CV_EXPORTS_W OpticalFlowPCAFlow : public DenseOpticalFlow
{
protected:
  const Ptr<const PCAPrior> prior;
  const Size basisSize;
  const float sparseRate;              // (0 .. 0.1)
  const float retainedCornersFraction; // [0 .. 1]
  const float occlusionsThreshold;
  const float dampingFactor;
  const float claheClip;
  bool useOpenCL;
 
public:
  OpticalFlowPCAFlow( Ptr<const PCAPrior> _prior = Ptr<const PCAPrior>(), const Size _basisSize = Size( 18, 14 ),
                      float _sparseRate = 0.024, float _retainedCornersFraction = 0.2,
                      float _occlusionsThreshold = 0.0003, float _dampingFactor = 0.00002, float _claheClip = 14 );
 
  void calc( InputArray I0, InputArray I1, InputOutputArray flow ) CV_OVERRIDE;
  void collectGarbage() CV_OVERRIDE;
 
private:
  void findSparseFeatures( UMat &from, UMat &to, std::vector<Point2f> &features,
                           std::vector<Point2f> &predictedFeatures ) const;
 
  void removeOcclusions( UMat &from, UMat &to, std::vector<Point2f> &features,
                         std::vector<Point2f> &predictedFeatures ) const;
 
  void getSystem( OutputArray AOut, OutputArray b1Out, OutputArray b2Out, const std::vector<Point2f> &features,
                  const std::vector<Point2f> &predictedFeatures, const Size size );
 
  void getSystem( OutputArray A1Out, OutputArray A2Out, OutputArray b1Out, OutputArray b2Out,
                  const std::vector<Point2f> &features, const std::vector<Point2f> &predictedFeatures,
                  const Size size );
 
  OpticalFlowPCAFlow& operator=( const OpticalFlowPCAFlow& ); // make it non-assignable
};
 
CV_EXPORTS_W Ptr<DenseOpticalFlow> createOptFlow_PCAFlow();
 
 
}
}
 
#endif