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An Approach to the Compact and Efficient Visual Codebook Based on SIFT Descriptor

  • Zhe Wang
  • Guizhong Liu
  • Xueming Qian
  • Danping Guo
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6297)

Abstract

The Bag-of-Words (BoW) derived from local keypoints was widely applied in visual information research such as image search, video retrieval, object categorization, and computer vision. Construction of visual codebook is a well-known and predominant method for the representation of BoW. However, a visual codebook usually has a high dimension that results in high computational complexity. In this paper, an approach is presented for constructing a compact visual codebook. Two important parameters, namely the likelihood ratio and the significant level, are proposed to estimate the discriminative capability of each of the codewords. Thus, the codewords that have higher discriminative capability are reserved, and the others are removed. Experiments prove that application of the proposed compact codebook not only reduces computational complexity, but also improves performance of object classification..

Keywords

SIFT descriptor visual codebook compact codebook 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Zhe Wang
    • 1
  • Guizhong Liu
    • 1
  • Xueming Qian
    • 1
  • Danping Guo
    • 1
  1. 1.School of Electronics and Information EngineeringXi’an Jiaotong UniversityChina

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