Hi everybody ! I used webcam to detect and draw the circle cover the ball that was got from webcam using Hough transform, but I couldn't draw right circle cover this ball and there were many wrong circles were painted. Here is my code : VideoCapture capture(0); Mat src,col; while(true) { capture >> col; cvtColor(col.clone(),src,CV_BGR2GRAY); GaussianBlur( src, src, Size(9, 9), 2, 2 ); if(src.empty()) { cout<< "can't load file from webcam" <<endl; }<="" p="">
int canny_threshold = 200;
vector<Vec3f> circles;
HoughCircles(src,circles,CV_HOUGH_GRADIENT,
1, // dp
50, // min_dist_px
canny_threshold, // higher canny
20, // acc threshold
0, // min radius
0); // max radius
for(int i=0;i<circles.size(); i++)
{
Point center(cvRound(circles[i][0]),cvRound(circles[i][1]));
int radius = cvRound(circles[i][2]);
circle(col,center,radius,Scalar(0,0,255),2,8,0);
}
imshow("Window1",col);
char c = waitKey(33);
if(c==27) break;
}
Can everyone help me about this problem ? I will attach the error window that contain many wrong circles I got when I debug at here C:\fakepath\Untitled2.png Have a great day !
