Pattern Analysis and Applications

, Volume 18, Issue 3, pp 639–650

Graph regularized linear discriminant analysis and its generalization

Short Paper

Abstract

Linear discriminant analysis (LDA) is a powerful dimensionality reduction technique, which has been widely used in many applications. Although, LDA is well-known for its discriminant capability, it clearly does not capture the geometric structure of the data. However, from the geometric perspective, the high-dimensional data resides on some low-dimensional manifolds in the sample space and these manifold structures are essential for data clustering and classification. In this paper, we propose a novel LDA algorithm named graph regularized linear discriminant analysis (GRLDA) to further improve the conventional LDA by incorporating such geometric information of data. GRLDA is achieved by penalizing the LDA with a Graph regularization, which is an affinity matrix encoding the geometric relationship of the data points. To take high-order geometric relationship among samples into consideration, we generalize GRLDA via using the hypergraph regularization instead of the graph regularization. We name this new version as hyper graph regularized linear discriminant analysis. Moreover, we exploit the null space of LDA via using an identity matrix to regularize the between-class scatter matrix. This strategy can further improve the discriminating power of LDA algorithms. Four popular face databases are used to evaluate our proposed LDA algorithms and the results of experiments demonstrate that they outperform the state-of-the-art dimensionality reduction algorithms.

Keywords

Linear discriminant analysis Locality preserving projections Face recognition Dimensionality reduction Hypergraph learning 

Copyright information

© Springer-Verlag London 2014

Authors and Affiliations

  • Sheng Huang
    • 1
  • Dan Yang
    • 1
  • Jia Zhou
    • 1
  • Xiaohong Zhang
    • 2
  1. 1.College of Computer ScienceChongqing UniversityChongqingPeople’s Republic of China
  2. 2.School of Software Engineering, Ministry of Education Key Laboratory, Dependable Service Computing in Cyber Physical SocietyChongqing UniversityChongqingPeople’s Republic of China

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