Abstract

We propose a framework for a fast exact shape retrieval called Low-complexity Arrays of Contour Signatures. The purposes are to match a shape against a database in constant time and to retrieve correct shapes very close to the query, while the latter may have undergone rigid transformations and noise. We present a shape signature based on prior works as well as a compact characterization of such signatures, a system of associative arrays allowing a short search time for retrieval and a technique of pairwise alignment. This method shows a good resilience to perturbations and is performed in constant computational time.

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