2 #pragma package <opencv>
5 #define CV_NO_BACKWARD_COMPATIBILITY
17 void on_trackbar(int pos)
19 IplImage* cnt_img = cvCreateImage( cvSize(w,w), 8, 3 );
20 CvSeq* _contours = contours;
21 int _levels = levels - 3;
22 if( _levels <= 0 ) // get to the nearest face to make it look more funny
23 _contours = _contours->h_next->h_next->h_next;
25 cvDrawContours( cnt_img, _contours, CV_RGB(255,0,0), CV_RGB(0,255,0), _levels, 3, CV_AA, cvPoint(0,0) );
26 cvShowImage( "contours", cnt_img );
27 cvReleaseImage( &cnt_img );
30 int main( int argc, char** argv )
33 CvMemStorage* storage = cvCreateMemStorage(0);
34 IplImage* img = cvCreateImage( cvSize(w,w), 8, 1 );
38 for( i=0; i < 6; i++ )
40 int dx = (i%2)*250 - 30;
42 CvScalar white = cvRealScalar(255);
43 CvScalar black = cvRealScalar(0);
47 for( j = 0; j <= 10; j++ )
49 double angle = (j+5)*CV_PI/21;
50 cvLine(img, cvPoint(cvRound(dx+100+j*10-80*cos(angle)),
51 cvRound(dy+100-90*sin(angle))),
52 cvPoint(cvRound(dx+100+j*10-30*cos(angle)),
53 cvRound(dy+100-30*sin(angle))), white, 1, 8, 0);
57 cvEllipse( img, cvPoint(dx+150, dy+100), cvSize(100,70), 0, 0, 360, white, -1, 8, 0 );
58 cvEllipse( img, cvPoint(dx+115, dy+70), cvSize(30,20), 0, 0, 360, black, -1, 8, 0 );
59 cvEllipse( img, cvPoint(dx+185, dy+70), cvSize(30,20), 0, 0, 360, black, -1, 8, 0 );
60 cvEllipse( img, cvPoint(dx+115, dy+70), cvSize(15,15), 0, 0, 360, white, -1, 8, 0 );
61 cvEllipse( img, cvPoint(dx+185, dy+70), cvSize(15,15), 0, 0, 360, white, -1, 8, 0 );
62 cvEllipse( img, cvPoint(dx+115, dy+70), cvSize(5,5), 0, 0, 360, black, -1, 8, 0 );
63 cvEllipse( img, cvPoint(dx+185, dy+70), cvSize(5,5), 0, 0, 360, black, -1, 8, 0 );
64 cvEllipse( img, cvPoint(dx+150, dy+100), cvSize(10,5), 0, 0, 360, black, -1, 8, 0 );
65 cvEllipse( img, cvPoint(dx+150, dy+150), cvSize(40,10), 0, 0, 360, black, -1, 8, 0 );
66 cvEllipse( img, cvPoint(dx+27, dy+100), cvSize(20,35), 0, 0, 360, white, -1, 8, 0 );
67 cvEllipse( img, cvPoint(dx+273, dy+100), cvSize(20,35), 0, 0, 360, white, -1, 8, 0 );
70 cvNamedWindow( "image", 1 );
71 cvShowImage( "image", img );
73 cvFindContours( img, storage, &contours, sizeof(CvContour),
74 CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, cvPoint(0,0) );
76 // comment this out if you do not want approximation
77 contours = cvApproxPoly( contours, sizeof(CvContour), storage, CV_POLY_APPROX_DP, 3, 1 );
79 cvNamedWindow( "contours", 1 );
80 cvCreateTrackbar( "levels+3", "contours", &levels, 7, on_trackbar );
84 cvReleaseMemStorage( &storage );
85 cvReleaseImage( &img );