70 lines
1.5 KiB
Mathematica
70 lines
1.5 KiB
Mathematica
#! /usr/bin/env octave
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printf("OpenCV Octave version of edge\n");
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global g;
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## import the necessary things for OpenCV
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cv;
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highgui;
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## some definitions
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g.win_name = "Edge";
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g.trackbar_name = "Threshold";
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## the callback on the trackbar
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function on_trackbar (position)
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global g;
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global cv;
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global highgui;
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cv.cvSmooth (g.gray, g.edge, cv.CV_BLUR, 3, 3, 0);
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cv.cvNot (g.gray, g.edge);
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## run the edge dector on gray scale
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cv.cvCanny (g.gray, g.edge, position, position * 3, 3);
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## reset
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cv.cvSetZero (g.col_edge);
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## copy edge points
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cv.cvCopy (g.image, g.col_edge, g.edge);
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## show the image
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highgui.cvShowImage (g.win_name, g.col_edge);
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endfunction
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filename = "../c/fruits.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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## load the image gived on the command line
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g.image = highgui.cvLoadImage (filename);
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if (!swig_this(g.image))
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printf("Error loading image '%s'",filename);
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exit(-1);
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endif
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## create the output image
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g.col_edge = cv.cvCreateImage (cv.cvSize (g.image.width, g.image.height), 8, 3);
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## convert to grayscale
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g.gray = cv.cvCreateImage (cv.cvSize (g.image.width, g.image.height), 8, 1);
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g.edge = cv.cvCreateImage (cv.cvSize (g.image.width, g.image.height), 8, 1);
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cv.cvCvtColor (g.image, g.gray, cv.CV_BGR2GRAY);
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## create the window
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highgui.cvNamedWindow (g.win_name, highgui.CV_WINDOW_AUTOSIZE);
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## create the trackbar
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highgui.cvCreateTrackbar (g.trackbar_name, g.win_name, 1, 100, @on_trackbar);
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## show the image
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on_trackbar (0);
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## wait a key pressed to end
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highgui.cvWaitKey (0);
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