Independent component analysis in a facial local residue space

Authors:
Tae-Kyun Kim;Hyunwoo Kim;Wonjun Hwang;Seok-Cheol Kee;Josef Kittler
Affiliations:
Human Computer Interaction Lab., Samsung Advanced Institute of Technology, Korea;Human Computer Interaction Lab., Samsung Advanced Institute of Technology, Korea and Centre for Vision, Speech and Signal Processing, University of Surrey, U.K;Human Computer Interaction Lab., Samsung Advanced Institute of Technology, Korea;Human Computer Interaction Lab., Samsung Advanced Institute of Technology, Korea;Centre for Vision, Speech and Signal Processing, University of Surrey, U.K
Venue:
CVPR'03 Proceedings of the 2003 IEEE computer society conference on Computer vision and pattern recognition
Year:
2003

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Abstract

In this paper, we propose an ICA(Indepdendent Component Analysis) based face recognition algorithm, which is robust to illumination and pose variation. Generally, it is well known that the first few eigenfaces represent illumination variation rather than identity. Most PCA(Principal Component Analysis)-based methods have overcome illumination variation by discarding the projection to a few leading eigenfaces. The space spanned after removing a few leading eigenfaces is called the "residual face space". We found that ICA in the residual face space provides more efficient encoding in terms of redundancy reduction and robustness to pose variation as well as illumination variation, owing to its ability to represent non-Gaussian statistics. Moreover, a face image is separated into several facial components, local spaces, and each local space is represented by the ICA bases (independent components) of its corresponding residual space. The statistical models of face images in local spaces are relatively simple and facilitate classification by a linear encoding. Various experimental results show that the accuracy of face recognition is significantly improved by the proposed method under large illumination and pose variations.