Localized versus locality-preserving subspace projections for face recognition

  • Authors:
  • Iulian B. Ciocoiu;Hariton N. Costin

  • Affiliations:
  • Faculty of Electronics and Telecommunications, "Gh. Asachi" Technical University of Iasi, Iasi, Romania;Faculty of Medical Bioengineering, "Gr. T. Popa" University of Medicine and Pharmacy, Iasi, Romania and Institute for Theoretical Computer Science, Romanian Academy, Iasi Branch, Iasi, Romania

  • Venue:
  • Journal on Image and Video Processing
  • Year:
  • 2007

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Abstract

Three different localized representation methods and a manifold learning approach to face recognition are compared in terms of recognition accuracy. The techniques under investigation are (a) local nonnegative matrix factorization (LNMF); (b) independent component analysis (ICA); (c) NMF with sparse constraints (NMFsc); (d) locality-preserving projections (Laplacian faces). A systematic comparative analysis is conducted in terms of distance metric used, number of selected features, and sources of variability on AR and Olivetti face databases. Results indicate that the relative ranking of the methods is highly task-dependent, and the performances vary significantly upon the distance metric used.