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decreased the lower canny threshold in HoughCircles, helps to detect some circles in low-contrast images (ticket #518)

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Vadim Pisarevsky 2010-11-22 12:16:38 +00:00
parent 732bd621bb
commit ce41f74ab4
1 changed files with 1 additions and 1 deletions
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modules/imgproc/src/hough.cpp
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@ -817,7 +817,7 @@ icvHoughCirclesGradient( CvMat* img, float dp, float min_dist,
CvSeqReader reader;
edges = cvCreateMat( img->rows, img->cols, CV_8UC1 );
cvCanny( img, edges, MAX(canny_threshold/2,1), canny_threshold, 3 );
cvCanny( img, edges, MAX(canny_threshold/5,1), canny_threshold, 3 );
dx = cvCreateMat( img->rows, img->cols, CV_16SC1 );
dy = cvCreateMat( img->rows, img->cols, CV_16SC1 );