mirror of
https://github.com/opencv/opencv.git
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71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
#ifdef _CH_
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#pragma package <opencv>
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#endif
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#define CV_NO_BACKWARD_COMPATIBILITY
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#ifndef _EiC
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#include "cv.h"
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#include "highgui.h"
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#endif
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char wndname[] = "Edge";
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char tbarname[] = "Threshold";
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int edge_thresh = 1;
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IplImage *image = 0, *cedge = 0, *gray = 0, *edge = 0;
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// define a trackbar callback
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void on_trackbar(int h)
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{
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cvSmooth( gray, edge, CV_BLUR, 3, 3, 0, 0 );
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cvNot( gray, edge );
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// Run the edge detector on grayscale
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cvCanny(gray, edge, (float)edge_thresh, (float)edge_thresh*3, 3);
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cvZero( cedge );
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// copy edge points
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cvCopy( image, cedge, edge );
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cvShowImage(wndname, cedge);
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}
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int main( int argc, char** argv )
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{
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char* filename = argc == 2 ? argv[1] : (char*)"fruits.jpg";
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if( (image = cvLoadImage( filename, 1)) == 0 )
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return -1;
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// Create the output image
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cedge = cvCreateImage(cvSize(image->width,image->height), IPL_DEPTH_8U, 3);
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// Convert to grayscale
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gray = cvCreateImage(cvSize(image->width,image->height), IPL_DEPTH_8U, 1);
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edge = cvCreateImage(cvSize(image->width,image->height), IPL_DEPTH_8U, 1);
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cvCvtColor(image, gray, CV_BGR2GRAY);
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// Create a window
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cvNamedWindow(wndname, 1);
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// create a toolbar
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cvCreateTrackbar(tbarname, wndname, &edge_thresh, 100, on_trackbar);
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// Show the image
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on_trackbar(0);
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// Wait for a key stroke; the same function arranges events processing
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cvWaitKey(0);
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cvReleaseImage(&image);
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cvReleaseImage(&gray);
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cvReleaseImage(&edge);
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cvDestroyWindow(wndname);
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return 0;
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}
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#ifdef _EiC
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main(1,"edge.c");
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#endif
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