Cross-Codebook Image Classification

  • Shuai Liao
  • Xirong Li
  • Xiaoyong Du
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8294)

Abstract

Representing images by bag of visual codes (BoVC) features has been the cornerstone of state-of-the-art image classification system. Since the BoVC features depend on a precomputed codebook in use, when the codebook applied to test images differs from the codebook of an existing image classification system, the system becomes inapplicable. To resolve the codebook incompatibility problem, we propose in this paper cross-codebook image classification. This is achieved by transforming BoVC features derived from one codebook to make them compatible with another codebook. Two BoVC transform methods, i.e., code-reassignment and least squares, are studied. Experiments on a popular image classification benchmark set show that both methods are better than random guess when crossing the codebooks. In particular, when the BoVC features are transformed from a higher dimension to a relatively small dimension, cross-codebook image classification has a similar performance compared to within-codebook image classification, with a relative performance loss of 1.3% only. The results justify the feasibility of the proposed cross-codebook image classification.

Keywords

Image classification bag of visual codes cross-codebook 

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Copyright information

© Springer International Publishing Switzerland 2013

Authors and Affiliations

  • Shuai Liao
    • 1
    • 2
  • Xirong Li
    • 1
    • 2
  • Xiaoyong Du
    • 1
    • 2
    • 3
  1. 1.Key Lab of Data Engineering and Knowledge EngineeringMOEChina
  2. 2.School of InformationRenmin University of ChinaBeijingChina
  3. 3.State Key Lab of Software Development EnvironmentBeijingChina

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