Metric-Based Shape Retrieval in Large Databases

  • Authors:
  • Thomas B. Sebastian;Benjamin B. Kimia

  • Affiliations:
  • -;-

  • Venue:
  • ICPR '02 Proceedings of the 16 th International Conference on Pattern Recognition (ICPR'02) Volume 3 - Volume 3
  • Year:
  • 2002

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Abstract

This paper examines the problem of database organization and retrieval based on computing metric pairwise distances. A low-dimensional Euclidean approximation of a high-dimensional metric space is not efficient, while search in a high-dimensional Euclidean space suffers from the "curse of dimensionality". Thus, techniques designed for searching metric spaces must be used. We evaluate several such existing exact metric-based indexing techniques, and show that they require extensive computational effort. This motivates the development of an approximate nearest neighbor search technique where the K nearest neighbors are used to approximate the local neighborhood of a point. The resulting K NN graph is searched in a best-first fashion producing excellent indexing efficiency.