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The Taub Faculty of Computer Science Events and Talks

Pixel Club: Correspondence-less Approach to Matching of Deformable Shapes
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Jonathan Pokrass (Tel Aviv University)
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Tuesday, 03.05.2011, 11:30
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Room 337-8 Taub Bld.
Finding a match between partially available deformable shapes is a challenging problem with numerous applications. The problem is usually approached by computing local descriptors on a pair of shapes and then establishing a point-wise correspondence between the two. We introduce an alternative correspondence-less approach to matching fragments to an entire shape undergoing a non-rigid deformation. We use diffusion geometric descriptors and optimize over the integration domains on which the integral descriptors of the two parts match. The problem is regularized using the Mumford-Shah functional. We show an efficient discretization based on the Ambrosio-Tortorelli approximation generalized to triangular meshes. Experiments demonstrating the success of the proposed method are presented.

This work was done under the supervision of Dr. Alex Bronstein.