Discriminant Non-negative Matrix Factorization and Projected Gradients for Frontal Face Verification

Authors:
Irene Kotsia;Stefanos Zafeiriou;Ioannis Pitas
Affiliations:
Dept. of Informatics, Aristotle University of Thessaloniki, Greece and Informatics and Telematics Institute, CERTH, Greece;Dept. of Informatics, Aristotle University of Thessaloniki, Greece;Dept. of Informatics, Aristotle University of Thessaloniki, Greece and Informatics and Telematics Institute, CERTH, Greece
Venue:
Biometrics and Identity Management
Year:
2008

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Abstract

A novel Discriminant Non-negative Matrix Factorization (DNMF) method that uses projected gradients, is presented in this paper. The proposed algorithm guarantees the algorithm's convergence to a stationary point, contrary to the methods introduced so far, that only ensure the non-increasing behavior of the algorithm's cost function. The proposed algorithm employs some extra modifications that make the method more suitable for classification tasks. The usefulness of the proposed technique to the frontal face verification problem is also demonstrated.