2 ## This is a standalone program. Pass an image name as a first parameter of the program.
7 ## toggle between CV_HOUGH_STANDARD and CV_HOUGH_PROBILISTIC
10 filename = "../../docs/ref/pics/building.jpg"
15 src=cvLoadImage(filename, 0);
17 printf("Error opening image %s\n",filename);
21 dst = cvCreateImage( cvGetSize(src), 8, 1 );
22 color_dst = cvCreateImage( cvGetSize(src), 8, 3 );
23 storage = cvCreateMemStorage(0);
25 cvCanny( src, dst, 50, 200, 3 );
26 cvCvtColor( dst, color_dst, CV_GRAY2BGR );
29 lines = cvHoughLines2( dst, storage, CV_HOUGH_STANDARD, 1, CV_PI/180, 100, 0, 0 );
31 for i=0:min(lines.total, 100)-1,
41 pt1.x = cvRound(x0 + 1000*(-b));
42 pt1.y = cvRound(y0 + 1000*(a));
43 pt2.x = cvRound(x0 - 1000*(-b));
44 pt2.y = cvRound(y0 - 1000*(a));
45 cvLine( color_dst, pt1, pt2, CV_RGB(255,0,0), 3, 8 );
49 lines = cvHoughLines2( dst, storage, CV_HOUGH_PROBABILISTIC, 1, CV_PI/180, 50, 50, 10 );
50 for line = CvSeq_map(lines),
52 cvLine( color_dst, line{0}, line{1}, CV_RGB(255,0,0), 3, 8 );
56 cvNamedWindow( "Source", 1 );
57 cvShowImage( "Source", src );
59 cvNamedWindow( "Hough", 1 );
60 cvShowImage( "Hough", color_dst );