基于openCV 的contour图像边缘检测算法.doc

contour轮廓检测#ifdef _CH_#pragma package #endif #ifndef _EiC#include cv.h#include cxcore.h#include highgui.h#include #endif #define w 500int 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 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, j; 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); if( i = 0 ) for( j = 0; j = 10; j+ ) double angle = (j+5)*CV_PI/21; cvLine(img, cvPoint(cvRound(dx+100+j*10-80*cos(angle), cvRound(dy+100-90*sin(angle), cvPoint(cvRound(dx+100+j*10-30*cos(angle), cvRound(dy+100-30*sin(angle), white, 1, 8, 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