Abstract

This paper presents a new boundary (shape) matching algorithm for 2D rigid objects without voids. Our new algorithm presents a new shape representation that uses the outcome from an active contour (AC) model. An object’s shape is partitioned into a clockwise ordered sequence of edges, where every edge is a boundary segment enclosed by reference points. These points are convex hull vertices which lie on boundary corners. Further, the reference points are used to generate angles. Hence, a boundary shape maps to a sequence of angles, turning the shape matching problem to alignment of cyclic sequences of angles. The latter makes our method scaling and rotational invariant. Experiments validate the theoretical concept, and provide qualitative comparison with other methods in the field.

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