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Issue No. 12 - December (2010 vol. 32)
ISSN: 0162-8828
pp: 2162-2177
Stefano Berretti , Università degli Studi di Firenze, Firenze
Alberto Del Bimbo , Università degli Studi di Firenze, Firenze
Pietro Pala , Università degli Studi di Firenze, Firenze
In this paper, we present a novel approach to 3D face matching that shows high effectiveness in distinguishing facial differences between distinct individuals from differences induced by nonneutral expressions within the same individual. The approach takes into account geometrical information of the 3D face and encodes the relevant information into a compact representation in the form of a graph. Nodes of the graph represent equal width isogeodesic facial stripes. Arcs between pairs of nodes are labeled with descriptors, referred to as 3D Weighted Walkthroughs (3DWWs), that capture the mutual relative spatial displacement between all the pairs of points of the corresponding stripes. Face partitioning into isogeodesic stripes and 3DWWs together provide an approximate representation of local morphology of faces that exhibits smooth variations for changes induced by facial expressions. The graph-based representation permits very efficient matching for face recognition and is also suited to being employed for face identification in very large data sets with the support of appropriate index structures. The method obtained the best ranking at the SHREC 2008 contest for 3D face recognition. We present an extensive comparative evaluation of the performance with the FRGC v2.0 data set and the SHREC08 data set.
3D face recognition, 3D face model, isogeodesic stripe partitioning, 3D weighted walkthroughs, 3D face matching, performance evaluation.

A. D. Bimbo, S. Berretti and P. Pala, "3D Face Recognition Using Isogeodesic Stripes," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 32, no. , pp. 2162-2177, 2010.
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