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Optimal metric selection for improved multi-pose face recognition with group information

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Authors
Zhang, X.
Pham, DucSon
Liu, W.
Venkatesh, S.
Date
2012
Type
Conference Paper

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Zhang, Xin and Pham, Duc-Son and Liu, Wanquan and Venkatesh, Svetha. 2012. Optimal metric selection for improved multi-pose face recognition with group information, in Proceedings of the 2012 21st International Conference on Pattern Recognition, Nov 11-15 2012, pp. 1675-1678. Tsukuba, Japan: Science Council of Japan.
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Proceedings of the 2012 International Conference on Pattern Recognition
Source Conference
International Conference on Pattern Recognition
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Abstract

We address the limitation of sparse representation based classification with group information for multi-pose face recognition. First, we observe that the key issue of such classification problem lies in the choice of the metric norm of the residual vectors, which represent the fitness of each class. Then we point out that limitation of the current sparse representation classification algorithms is the wrong choice of the ℓ2 norm, which does not match with data statistics as these residual values may be considerably non-Gaussian. We propose an explicit but effective solution using ℓp norm and explain theoretically and numerically why such metric norm would be able to suppress outliers and thus can significantly improve classification performance comparable to the state-of-arts algorithms on some challenging datasets.