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

After detecting the joined coins, I recommend applying morphological operations to classify areas as "definitely coin" and "definitely not coin", apply a distance transformation, then run the watershed to determine the boundaries. This scenario is actually the demonstration example for the watershed algorithm in OpenCV − perhaps it was created in response to this question.