1. 1School of Information Science and Engineering, Shenyang University of Technology, Shenyang 110870, China.2. 2The University of Texas Health Science Center at Houston, Houston 77030, USA.3. 3Schulich School of Engineering, University of Calgary, Calgary T2N 1N4, Canada
发布日期：
2015-12-21
摘要
With the development of face recognition using sparse representation based classification (SRC), many relevant methods have been proposed and investigated. However, when the dictionary is large and the representation is sparse, only a small proportion of the elements contributes to the 1-minimization. Under this observation, several approaches have been developed to carry out an efficient element selection procedure before SRC. In this paper, we employ a metric learning approach which helps find the active elements correctly by taking into account the interclass/intraclass relationship and manifold structure of face images. After the metric has been learned, a neighborhood graph is constructed in the projected space. A fast marching algorithm is used to rapidly select the subset from the graph, and SRC is implemented for classification. Experimental results show that our method achieves promising performance and significant efficiency enhancement.
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