Efficient shape matching using shape contexts

Greg Mori, Serge Belongie, Jitendra Malik
IEEE Transactions on Pattern Analysis and Machine Intelligence 2005, 27 (11): 1832-7
We demonstrate that shape contexts can be used to quickly prune a search for similar shapes. We present two algorithms for rapid shape retrieval: representative shape contexts, performing comparisons based on a small number of shape contexts, and shapemes, using vector quantization in the space of shape contexts to obtain prototypical shape pieces.

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