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In OpenCV 1 there used to be an option of cvFindContours (using CV_CHAIN_CODE) to obtain a contour from an image in Freeman chain code. However, I cannot find it in OpenCV 3. Has it been removed as option? I know I could develop my own function to generate Freeman chain code from a contour given as a sequence of points, but I thought there was a ready-made function already available.

In OpenCV 1 there used to be an option of cvFindContours (using CV_CHAIN_CODE) to obtain a contour from an image in Freeman chain code. However, I cannot find it in OpenCV 3. Has it been removed as option? I know I could develop my own function to generate Freeman chain code from a contour given as a sequence of points, but I thought there was a ready-made function already available.