Enlarge the Training Set Based on Inter-Class Relationship for Face Recognition from One Image per Person |
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| Authors: | Qin Li Hua Jing Wang Jane You Zhao Ming Li Jin Xue Li |
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| Affiliation: | 1. College of Physics Science and Technology, Shenzhen University, Shenzhen, China.; 2. Department of Computing, The Hong Kong Polytechnic University, KLN, Hong Kong.; 3. Lab of Medical Devices, Shenzhen Academy of Metrology and Quality Inspection, Shenzhen, China.; Universidad de Castilla-La Mancha, Spain, |
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| Abstract: | In some large-scale face recognition task, such as driver license identification and law enforcement, the training set only contains one image per person. This situation is referred to as one sample problem. Because many face recognition techniques implicitly assume that several (at least two) images per person are available for training, they cannot deal with the one sample problem. This paper investigates principal component analysis (PCA), Fisher linear discriminant analysis (LDA), and locality preserving projections (LPP) and shows why they cannot perform well in one sample problem. After that, this paper presents four reasons that make one sample problem itself difficult: the small sample size problem; the lack of representative samples; the underestimated intra-class variation; and the overestimated inter-class variation. Based on the analysis, this paper proposes to enlarge the training set based on the inter-class relationship. This paper also extends LDA and LPP to extract features from the enlarged training set. The experimental results show the effectiveness of the proposed method. |
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