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Proceedings Paper

Boosting multiple classifiers by hybrid discriminant analysis for face identification
Author(s): Jie Yu; Qi Tian
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Paper Abstract

Linear Discriminant Analysis (LDA) has been widely applied in the field of face identification because of its simplicity and efficiency in capturing the most discriminant features. However LDA often fails when facing the change in illumination, pose or small training size. To overcome those difficulties, Principal Component Analysis (PCA), which recover the most descriptive/informative features in the reduced dimension feature space, are often used in preprocessing stage. Although there is a trend of preferring LDA over PCA in classification, it has been found that PCA may perform better than LDA in some cases, especially when the size of the training set is small. To better combine the merits of PCA and LDA, some rule-based parametric combination of PCA and LDA methods have been proposed. However in those methods the optimal parameter setting is not guaranteed and can only be approximated by exhaustive search. In this paper we propose a learning-based framework that can unify PCA and LDA in adaptively finding both discriminant and descriptive feature. To eliminate the parameter selection, we incorporate a non-linear boosting process to enhance a pool of hybrid classifiers and combine them into a more accurate one. To evaluate the performance of our boosted hybrid method, we compare it to state-of-the-art LDA variants and traditional PCA-LDA technique on three widely used face image benchmark databases. The experiment results show that our novel boosted hybrid discriminant analysis outperforms the other techniques and the best single hybrid classifier.

Paper Details

Date Published: 25 October 2005
PDF: 11 pages
Proc. SPIE 6015, Multimedia Systems and Applications VIII, 60150Z (25 October 2005); doi: 10.1117/12.631238
Show Author Affiliations
Jie Yu, The Univ. of Texas at San Antonio (United States)
Qi Tian, The Univ. of Texas at San Antonio (United States)


Published in SPIE Proceedings Vol. 6015:
Multimedia Systems and Applications VIII
Anthony Vetro; Chang Wen Chen; C.-C. J. Kuo; Tong Zhang; Qi Tian; John R. Smith, Editor(s)

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