Subspace distance analysis with application to adaptive Bayesian algorithm for face recognition

Authors:
Liwei Wang;Xiao Wang;Jufu Feng
Affiliations:
Center for Information Sciences, School of Electronics Engineering and Computer Sciences, Peking University, Beijing 100871, China;Center for Information Sciences, School of Electronics Engineering and Computer Sciences, Peking University, Beijing 100871, China;Center for Information Sciences, School of Electronics Engineering and Computer Sciences, Peking University, Beijing 100871, China
Venue:
Pattern Recognition
Year:
2006

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Abstract

We propose subspace distance measures to analyze the similarity between intrapersonal face subspaces, which characterize the variations between face images of the same individual. We call the conventional intrapersonal subspace average intrapersonal subspace (AIS) because the image differences often come from a large number of persons. An intrapersonal subspace is referred to as specific intrapersonal subspace (SIS) if the image differences are from just one person. We demonstrate that SIS varies significantly from person to person, and most SISs are not similar to AIS. Based on these observations, we introduce the maximum a posteriori (MAP) adaptation to the problem of SIS estimation, and apply it to the Bayesian face recognition algorithm. Experimental results show that the adaptive Bayesian algorithm outperforms the non-adaptive Bayesian algorithm as well as Eigenface and Fisherface methods if a small number of adaptation images are available.