shape context implementation in opencv

edit savecancel

Hey there,

unfortunately, OpenCV has no shape context (SC) implementation accepted, yet. You can find here a C++ implementation that was implemented analogeously to Belongie et al. (2000, 2001, 2002) (I'm not sure if the second link is really their's): http://www.umiacs.umd.edu/~zhengyf/PointMatching.htm

The original (?) MATLAB-implementation can be found here: http://www.eecs.berkeley.edu/Research/Projects/CS/vision/shape/sc_digits.html

C#-implementation: http://www.pscode.com/vb/scripts/ShowCode.asp?txtCodeId=7465&lngWId=10

And see what happens in the following link. Someone made there a mistake to mix up shape matching and shape context, so read carefully the documentation if you read about shape matching in OpenCV that uses Hu moments and shape matching using shape context. There's nothing for SC in OpenCV like the descriptor (shape context/the histogram [log(r),theta]), assignment problem solver (like hungarian [by munkres in O(n^3)], ...) etc.] or deforming algorithms to model transformations (TPS - Thin Plate Spline, ...) etc. as far as I know). Here the link: http://stackoverflow.com/questions/3146546/objective-c-implementation-of-shape-context-algorithm-image-matching

Here the Hu-moments-based shape matching.. Maybe it already satisfies your needs as SC is tricky to implement by yourself. Here the link to matching (...): http://docs.opencv.org/modules/imgproc/doc/structural_analysis_and_shape_descriptors.html