Reshaping noisy coin into a circle form

Question

I\'m doing a coin detection using JavaCV (OpenCV wrapper) but I have a little problem when the coins are connected. If I try to erode them to separate these coins they loose

Answer 1

You don't need to erode, just a good set of params for cvHoughCircles():

The code used to generate this image came from my other post: Detecting Circles, with these parameters:

CvSeq* circles = cvHoughCircles(gray, storage, CV_HOUGH_GRADIENT, 1, gray->height/12, 80, 26);