A: 

See http://opencv.willowgarage.com/documentation/cpp/index.html

I don't see anything for clustering/centroids, but you might try FindContours: http://opencv.willowgarage.com/documentation/cpp/structural_analysis_and_shape_descriptors.html#findcontours .

It sounds like you want to do visualization analysis and this library is more suited to machine vision.

Potatoswatter  2010-01-07 09:12:15
Actually 2d skeleton estimation is very common in machine vision. A common example is finding holes in objects, a routine QA check. A machine vision implementation of that check can be done by finding 2D skeletons; objects with holes have skeletons with loops.
MSalters  2010-01-07 13:05:03
Thankx salter plese can you provide me any documents or code or links for the same as above
kumar  2010-01-12 05:26:33

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