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Open Source Computer Vision Library
https://opencv.org/
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63 lines
1.5 KiB
63 lines
1.5 KiB
15 years ago
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#! /usr/bin/env octave
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## This is a standalone program. Pass an image name as a first parameter of the program.
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cv;
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highgui;
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## toggle between CV_HOUGH_STANDARD and CV_HOUGH_PROBILISTIC
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USE_STANDARD=0;
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filename = "../../docs/ref/pics/building.jpg"
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if (size(argv, 1)>=1)
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filename = argv(){1};
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endif
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src=cvLoadImage(filename, 0);
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if (!swig_this(src))
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printf("Error opening image %s\n",filename);
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exit(-1);
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endif
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dst = cvCreateImage( cvGetSize(src), 8, 1 );
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color_dst = cvCreateImage( cvGetSize(src), 8, 3 );
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storage = cvCreateMemStorage(0);
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lines = 0;
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cvCanny( src, dst, 50, 200, 3 );
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cvCvtColor( dst, color_dst, CV_GRAY2BGR );
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if (USE_STANDARD)
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lines = cvHoughLines2( dst, storage, CV_HOUGH_STANDARD, 1, CV_PI/180, 100, 0, 0 );
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for i=0:min(lines.total, 100)-1,
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line = lines{i};
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rho = line{0};
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theta = line{1};
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pt1 = CvPoint();
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pt2 = CvPoint();
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a = cos(theta);
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b = sin(theta);
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x0 = a*rho;
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y0 = b*rho;
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pt1.x = cvRound(x0 + 1000*(-b));
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pt1.y = cvRound(y0 + 1000*(a));
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pt2.x = cvRound(x0 - 1000*(-b));
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pt2.y = cvRound(y0 - 1000*(a));
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cvLine( color_dst, pt1, pt2, CV_RGB(255,0,0), 3, 8 );
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endfor
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else
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lines = cvHoughLines2( dst, storage, CV_HOUGH_PROBABILISTIC, 1, CV_PI/180, 50, 50, 10 );
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for line = CvSeq_map(lines),
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line = line{1};
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cvLine( color_dst, line{0}, line{1}, CV_RGB(255,0,0), 3, 8 );
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endfor
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endif
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cvNamedWindow( "Source", 1 );
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cvShowImage( "Source", src );
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cvNamedWindow( "Hough", 1 );
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cvShowImage( "Hough", color_dst );
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cvWaitKey(0);
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