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Collaborative Representation based Face Classification Exploiting Block Weighted LBP and Analysis Dictionary Learning

Song, Xiaoning, Chen, Youming, Feng, Zhenhua, Hu, Guosheng, Zhang, Tao and Wu, Xiao-jun (2019) Collaborative Representation based Face Classification Exploiting Block Weighted LBP and Analysis Dictionary Learning Pattern Recognition, 88. pp. 127-138.

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Traditional collaborative representation based classification (CRC) method usually faces the challenge of data uncertainty hence results in poor performance, especially in the presence of appearance variations in pose, expression and illumination. To overcome this issue, this paper presents a CRC-based face classification method by jointly using block weighted LBP and analysis dictionary learning. To this end, we first design a block weighted LBP histogram algorithm to form a set of local histogram-based feature vectors instead of using raw images. By this means we are able to effectively decrease data redundancy and uncertainty derived from image noises and appearance variations. Second, we adopt an analysis dictionary learning model as the projection transform to construct an analysis subspace, in which a new sample is characterized with the improved sparsity of its reconstruction coefficient vector. The crucial role of the analysis dictionary learning method in CRC is revealed by its capacity of the collaborative representation in an analytic coefficient space. Extensive experimental results conducted on a set of well-known face databases demonstrate the merits of the proposed method.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
Song, Xiaoning
Chen, Youming
Hu, Guosheng
Zhang, Tao
Wu, Xiao-jun
Date : April 2019
Funders : Engineering and Physical Sciences Research Council (EPSRC)
DOI : 10.1016/j.patcog.2018.11.008
Grant Title : FACER2VM
Copyright Disclaimer : © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Uncontrolled Keywords : Analysis dictionary learning; Block weighted LBP; Collaborative representation based classification; Face classification
Depositing User : Melanie Hughes
Date Deposited : 21 Nov 2018 09:42
Last Modified : 16 Nov 2019 02:08

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