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