testcirle.rar_c++检测圆

#include <cv.h> #include <highgui.h> #include <math.h> int main(int argc, char** argv) { IplImage* img; img=cvLoadImage("F:\\images\\249189_205.jpg", 1); IplImage* gray = cvCreateImage( cvGetSize(img), 8, 1 ); CvMemStorage* storage = cvCreateMemStorage(0); cvCvtColor( img, gray, CV_BGR2GRAY ); cvSmooth( gray, gray, CV_GAUSSIAN, 9, 9 ); // smooth it, otherwise a lot of false circles may be detected CvSeq* circles = cvHoughCircles( gray, storage, CV_HOUGH_GRADIENT, 2, gray->height/4, 200, 100 ); int i; for( i = 0; i < circles->total; i++ ) { float* p = (float*)cvGetSeqElem( circles, i ); cvCircle( img, cvPoint(cvRound(p[0]),cvRound(p[1])), 3, CV_RGB(0,255,0), -1, 8, 0 ); cvCircle( img, cvPoint(cvRound(p[0]),cvRound(p[1])), cvRound(p[2]), CV_RGB(255,0,0), 3, 8, 0 ); } cvNamedWindow( "circles", 1 ); cvShowImage( "circles", img ); cvWaitKey(0); return 0; }