cvlib is a puredata OpenCV extension library that enables low level features for individual cvContours processing. It can be used beside Antoine Villeret's pix_opencv library.

(pix_opencv is a Puredata library maintained by Antoine Villeret, for real-time video processing : blob tracking, contours extracting, motion flow computation... It is based on work by Yves Degoyon and Lluis Gomez i Bigorda, and uses OpenCV and Gem. For more details, please visit https://github.com/avilleret/pix_opencv.)