Discriminative learning by sparse representation for classification

Authors:
Fei Zang;Jiangshe Zhang
Affiliations:
School of Science, Xi'an Jiaotong University, Xi'an 710049, PR China and State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China;School of Science, Xi'an Jiaotong University, Xi'an 710049, PR China and State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China
Venue:
Neurocomputing
Year:
2011

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Abstract

Recently, sparsity preserving projections (SPP) algorithm has been proposed, which combines l"1-graph preserving the sparse reconstructive relationship of the data with the classical dimensionality reduction algorithm. However, when applied to classification problem, SPP only focuses on the sparse structure but ignores the label information of samples. To enhance the classification performance, a new algorithm termed discriminative learning by sparse representation projections or DLSP for short is proposed in this paper. DLSP algorithm incorporates the merits of both local interclass geometrical structure and sparsity property. That makes it possess the advantages of the sparse reconstruction, and more importantly, it has better capacity of discrimination, especially when the size of the training set is small. Extensive experimental results on serval publicly available data sets show the feasibility and effectiveness of the proposed algorithm.