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3D Face Discriminant Analysis Using Gauss-Markov Posterior Marginals

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4 Author(s)
Ocegueda, O. ; Dept. of Comput. Sci., Univ. of Houston, Houston, TX, USA ; Tianhong Fang ; Shah, S.K. ; Kakadiaris, I.A.

We present a Markov Random Field model for the analysis of lattices (e.g., images or 3D meshes) in terms of the discriminative information of their vertices. The proposed method provides a measure field that estimates the probability of each vertex being “discriminative” or “nondiscriminative” for a given classification task. To illustrate the applicability and generality of our framework, we use the estimated probabilities as feature scoring to define compact signatures for three different classification tasks: 1) 3D Face Recognition, 2) 3D Facial Expression Recognition, and 3) Ethnicity-based Subject Retrieval, obtaining very competitive results. The main contribution of this work lies in the development of a novel framework for feature selection in scenaria in which the most discriminative information is smoothly distributed along a lattice.

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Pattern Analysis and Machine Intelligence, IEEE Transactions on  (Volume:35 ,  Issue: 3 )
Biometrics Compendium, IEEE