c opencv computer-vision detection geometry

Circle Detection

I need help developing a circle detection algorithm to detect snooker balls. Does anyone know any algorithms that can be implemented in C and open cv? I'm having trouble getting this done

Solution

OpenCV 2.3 comes with HoughCircles. The C++ API for OpenCV 2.1 also implements the function: http://opencv.willowgarage.com/documentation/cpp/imgproc_feature_detection.html#HoughCircles

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