Update to 2.0.0 tree from current Fremantle build

[opencv] / src / cvaux / cvbgfg_common.cpp

diff --git a/src/cvaux/cvbgfg_common.cpp b/src/cvaux/cvbgfg_common.cpp
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+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  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.
+//
+//
+//                        Intel License Agreement
+//
+// Copyright (C) 2000, Intel Corporation, 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:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's 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.
+//
+//   * The name of Intel Corporation may not 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 the Intel Corporation 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.
+//
+//M*/
+
+#include "_cvaux.h"
+
+//  Function cvRefineForegroundMaskBySegm preforms FG post-processing based on segmentation
+//    (all pixels of the segment will be classified as FG if majority of pixels of the region are FG).
+// parameters:
+//      segments - pointer to result of segmentation (for example MeanShiftSegmentation)
+//      bg_model - pointer to CvBGStatModel structure
+CV_IMPL void cvRefineForegroundMaskBySegm( CvSeq* segments, CvBGStatModel*  bg_model )
+{
+       IplImage* tmp_image = cvCreateImage(cvSize(bg_model->foreground->width,bg_model->foreground->height),
+                                                       IPL_DEPTH_8U, 1);
+       for( ; segments; segments = ((CvSeq*)segments)->h_next )
+       {
+               CvSeq seq = *segments;
+               seq.v_next = seq.h_next = NULL;
+               cvZero(tmp_image);
+               cvDrawContours( tmp_image, &seq, CV_RGB(0, 0, 255), CV_RGB(0, 0, 255), 10, -1);
+               int num1 = cvCountNonZero(tmp_image);
+        cvAnd(tmp_image, bg_model->foreground, tmp_image);
+               int num2 = cvCountNonZero(tmp_image);
+               if( num2 > num1*0.5 )
+                       cvDrawContours( bg_model->foreground, &seq, CV_RGB(0, 0, 255), CV_RGB(0, 0, 255), 10, -1);
+               else
+                       cvDrawContours( bg_model->foreground, &seq, CV_RGB(0, 0, 0), CV_RGB(0, 0, 0), 10, -1);
+       }
+       cvReleaseImage(&tmp_image);
+}
+
+
+
+CV_IMPL CvSeq*
+cvSegmentFGMask( CvArr* _mask, int poly1Hull0, float perimScale,
+                 CvMemStorage* storage, CvPoint offset )
+{
+    CvMat mstub, *mask = cvGetMat( _mask, &mstub );
+    CvMemStorage* tempStorage = storage ? storage : cvCreateMemStorage();
+    CvSeq *contours, *c;
+    int nContours = 0;
+    CvContourScanner scanner;
+    
+    // clean up raw mask
+    cvMorphologyEx( mask, mask, 0, 0, CV_MOP_OPEN, 1 );
+    cvMorphologyEx( mask, mask, 0, 0, CV_MOP_CLOSE, 1 );
+
+    // find contours around only bigger regions
+    scanner = cvStartFindContours( mask, tempStorage,
+        sizeof(CvContour), CV_RETR_EXTERNAL, CV_CHAIN_APPROX_SIMPLE, offset );
+    
+    while( (c = cvFindNextContour( scanner )) != 0 ) 
+    {
+        double len = cvContourPerimeter( c );
+        double q = (mask->rows + mask->cols)/perimScale; // calculate perimeter len threshold
+        if( len < q ) //Get rid of blob if it's perimeter is too small
+            cvSubstituteContour( scanner, 0 );
+        else //Smooth it's edges if it's large enough
+        {
+            CvSeq* newC;
+            if( poly1Hull0 ) //Polygonal approximation of the segmentation 
+                newC = cvApproxPoly( c, sizeof(CvContour), tempStorage, CV_POLY_APPROX_DP, 2, 0 ); 
+            else //Convex Hull of the segmentation
+                newC = cvConvexHull2( c, tempStorage, CV_CLOCKWISE, 1 );
+            cvSubstituteContour( scanner, newC );
+            nContours++;
+        }
+    }
+    contours = cvEndFindContours( &scanner );
+
+    // paint the found regions back into the image
+    cvZero( mask );
+    for( c=contours; c != 0; c = c->h_next ) 
+        cvDrawContours( mask, c, cvScalarAll(255), cvScalarAll(0), -1, CV_FILLED, 8,
+            cvPoint(-offset.x,-offset.y));
+
+    if( tempStorage != storage )
+    {
+        cvReleaseMemStorage( &tempStorage );
+        contours = 0;
+    }
+
+    return contours;
+}
+
+/* End of file. */
+