I've got problem with detecting orange ball in OpenCV. In the pictures you see results after function inRange and the second one is thresholding. In both ways HoughCirles don't see circle which is seen in front of both pictures. They are not in good quality because of the camera, but I think that function should have no problem in recognizing circle. Thank you for all help. My code:
`enter code here`
CvMemStorage *storage = cvCreateMemStorage(0); //storage area for all contours
VideoCapture cap(0);
if (!cap.isOpened())// if supposed not success,
{
cout<<" cannot open the videofile"<<endl;// exit program
return -1;
}
bool bSuccess = cap.read(src);
if (!bSuccess)
{
cout<<"cannot read the frame from video file"<<endl;
break;
}
imwrite("temp1.jpg",src);
imwrite("tempblu.jpg",src);
Mat hsv_src
cvtColor(src, hsv_src, COLOR_BGR2HSV );
imwrite("tempcol.jpg",hsv_src);
inRange(hsv_src, Scalar(0, 120, 120), Scalar(30, 255, 255), hsv_src);
imwrite("temprange.jpg",hsv_src);
/// Reduce the noise so we avoid false circle detection
GaussianBlur( hsv_src, hsv_src, Size(9, 9), 2, 2 );
vector<Vec3f> circles;
/// Apply the Hough Transform to find the circles
HoughCircles( hsv_src, circles, CV_HOUGH_GRADIENT, 1, src_gray.rows/8, 200, 100, 0, 0 );
/// Draw the circles detected
for( size_t i = 0; i < circles.size(); i++ )
{
Point center(cvRound(circles[i][0]), cvRound(circles[i][1]));
int radius = cvRound(circles[i][2]);
// circle center
circle( src, center, 3, Scalar(0,255,0), -1, 8, 0 );
// circle outline
circle( src, center, radius, Scalar(0,0,255), 3, 8, 0 );
}
/// Show your results
cout<<"Circles found: "<<circles.size()<<endl;
namedWindow( "Hough Circle Transform Demo", CV_WINDOW_AUTOSIZE );
imshow( "Hough Circle Transform Demo", src );
