Added flow estimation using DCT basis

modules/optflow/include/opencv2/optflow.hpp

@@ -43,6 +43,8 @@ the use of this software, even if advised of the possibility of such damage.
 #include "opencv2/core.hpp"
 #include "opencv2/video.hpp"
 
+#include "opencv2/optflow/pcaflow.hpp"
+
 /**
 @defgroup optflow Optical Flow Algorithms
 
@@ -193,8 +195,6 @@ CV_EXPORTS_W Ptr<DenseOpticalFlow> createOptFlow_SparseToDense();
 
 CV_EXPORTS_W Ptr<DenseOpticalFlow> createOptFlow_BlockMatching();
 
-CV_EXPORTS_W Ptr<DenseOpticalFlow> createOptFlow_PCAFlow();
-
 //! @}
 
 } //optflow

modules/optflow/include/opencv2/optflow/pcaflow.hpp

@@ -0,0 +1,81 @@
+/*
+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
+                       (3-clause BSD License)
+
+Copyright (C) 2013, OpenCV Foundation, 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:
+
+  * Redistributions of source code must retain the above copyright notice,
+    this list of conditions and the following disclaimer.
+
+  * 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.
+
+  * Neither the names of the copyright holders nor the names of the contributors
+    may 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 copyright holders 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.
+*/
+
+#ifndef __OPENCV_OPTFLOW_PCAFLOW_HPP__
+#define __OPENCV_OPTFLOW_PCAFLOW_HPP__
+
+#include "opencv2/core.hpp"
+#include "opencv2/video.hpp"
+
+namespace cv
+{
+namespace optflow
+{
+
+class OpticalFlowPCAFlow : public DenseOpticalFlow
+{
+protected:
+  const Size basisSize;
+  const float sparseRate;              // (0 .. 0.1)
+  const float retainedCornersFraction; // [0 .. 1]
+  const float occlusionsThreshold;
+
+public:
+  OpticalFlowPCAFlow( Size _basisSize = Size( 18, 14 ), float _sparseRate = 0.02, float _retainedCornersFraction = 1.0,
+                      float _occlusionsThreshold = 0.00002 );
+
+  void calc( InputArray I0, InputArray I1, InputOutputArray flow );
+  void collectGarbage();
+
+private:
+  void findSparseFeatures( Mat &from, Mat &to, std::vector<Point2f> &features,
+                           std::vector<Point2f> &predictedFeatures ) const;
+
+  void removeOcclusions( Mat &from, Mat &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 );
+};
+
+CV_EXPORTS_W Ptr<DenseOpticalFlow> createOptFlow_PCAFlow();
+}
+}
+
+#endif