www.pudn.com > contours123.rar > contours.c

#ifdef _CH_ 
#pragma package  
#endif 
 
#ifndef _EiC 
#include "cv.h" 
#include "highgui.h" 
#endif 
 
#define w 500 
int levels = 3; 
CvSeq* contours = 0; 
 
void on_trackbar(int pos) 
{ 
    IplImage* cnt_img = cvCreateImage( cvSize(w,w), 8, 3 ); 
    CvSeq* _contours = contours; 
    int _levels = levels - 3; 
    if( _levels <= 0 ) // get to the nearest face to make it look more funny 
        _contours = _contours->h_next->h_next->h_next; 
    cvZero( cnt_img ); 
    cvDrawContours( cnt_img, _contours, CV_RGB(255,0,0), CV_RGB(0,255,0), _levels, 3, CV_AA, cvPoint(0,0) ); 
    cvShowImage( "contours", cnt_img ); 
    cvReleaseImage( &cnt_img ); 
} 
 
int main( int argc, char** argv ) 
{ 
    int i; 
    CvMemStorage* storage = cvCreateMemStorage(0); 
    IplImage* img = cvCreateImage( cvSize(w,w), 8, 1 ); 
 
    cvZero( img ); 
    for( i=0; i < 6; i++ ) 
    { 
        int dx = (i%2)*250 - 30; 
        int dy = (i/2)*150; 
        CvScalar white = cvRealScalar(255); 
        CvScalar black = cvRealScalar(0); 
 
        cvEllipse( img, cvPoint(dx+150, dy+100), cvSize(100,70), 0, 0, 360, white, -1, 8, 0 ); 
        cvEllipse( img, cvPoint(dx+115, dy+70), cvSize(30,20), 0, 0, 360, black, -1, 8, 0 ); 
        cvEllipse( img, cvPoint(dx+185, dy+70), cvSize(30,20), 0, 0, 360, black, -1, 8, 0 ); 
        cvEllipse( img, cvPoint(dx+115, dy+70), cvSize(15,15), 0, 0, 360, white, -1, 8, 0 ); 
        cvEllipse( img, cvPoint(dx+185, dy+70), cvSize(15,15), 0, 0, 360, white, -1, 8, 0 ); 
        cvEllipse( img, cvPoint(dx+115, dy+70), cvSize(5,5), 0, 0, 360, black, -1, 8, 0 ); 
        cvEllipse( img, cvPoint(dx+185, dy+70), cvSize(5,5), 0, 0, 360, black, -1, 8, 0 ); 
        cvEllipse( img, cvPoint(dx+150, dy+100), cvSize(10,5), 0, 0, 360, black, -1, 8, 0 ); 
        cvEllipse( img, cvPoint(dx+150, dy+150), cvSize(40,10), 0, 0, 360, black, -1, 8, 0 ); 
        cvEllipse( img, cvPoint(dx+27, dy+100), cvSize(20,35), 0, 0, 360, white, -1, 8, 0 ); 
        cvEllipse( img, cvPoint(dx+273, dy+100), cvSize(20,35), 0, 0, 360, white, -1, 8, 0 ); 
    } 
 
    cvNamedWindow( "image", 1 ); 
    cvShowImage( "image", img ); 
 
    cvFindContours( img, storage, &contours, sizeof(CvContour), 
                    CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, cvPoint(0,0) ); 
 
    // comment this out if you do not want approximation 
    contours = cvApproxPoly( contours, sizeof(CvContour), storage, CV_POLY_APPROX_DP, 3, 1 ); 
 
    cvNamedWindow( "contours", 1 ); 
    cvCreateTrackbar( "levels+3", "contours", &levels, 7, on_trackbar ); 
     
    on_trackbar(0); 
    cvWaitKey(0); 
 
    return 0; 
} 
 
#ifdef _EiC 
main(1,""); 
#endif