Comparing CBR and NN Performance in a 3D Face Recognition Application

A.C. Zimmerman, L.S. Encinas, L.M. de Oliveira, and J.M. Barreto (Brazil)

Keywords

Neural Networks, Radial Basis Function, Case Based Reasoning, Face Recognition, 3D Human Faces.

Abstract

The 3D face verification is a common task for hu mans, however for computers this is harder and slower. This paper shows results of two important paradigms in Artificial Intelligence AI, Artificial Neural Networks ANN and Case Based Reasoning CBR, applied to 3D facial pattern classification. To test both approaches, 52 different individuals with their own variations in different spatial positions and expressions compound the 3D face database. In the Case Based Reasoning approach, the Ham ming Distance evaluate the degree of similitude between cases. To improve the results a spatial normalization and a facial weight criterion are applied. In the Neural Net works approach by Radial Basis Function, the property of interpolation between faces and their variation, and the di versity of faces help to minimize the output error. The ob tained results show that ANN's paradigm classifies better the faces patterns than the CBR paradigm, reaching zero False Acceptance Ratio FAR and False Rejection Rate FRR errors for the 3D face set used.

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