How to detect a curve using chain code?

03 March 2015 1 6K Report

Suppose I have an image of the letter R. In this image straight lines are detected by Hough transform, but problems arise in curve detection. So can you tell me how to detect a curve using a Hough transform or chain code (i.e. by detecting neighborhood pixels)?

Mohamed Zahran

Digital curves can be detected using the so-called Generalized Hough Transform. Regarding chain code, each curve pixel is represented by a number (0,1,...8) indicating its orientation with respect to its preceding pixel. Differential chain code is invariant to image rotation.

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