Quantization from Bayes factors with application to multilevel thresholding

  • Authors:
  • F. Murtagh;J. L. Starck

  • Affiliations:
  • Department of Computer Science, School of Computer Science, Queen's University Belfast, 18 Malone Road, Belfast BT7 1NN, UK;DAPNIA/SEI-SAP, CEA-Saclay, F-91191 Gif-sur-Yvette Cedex, France

  • Venue:
  • Pattern Recognition Letters
  • Year:
  • 2003

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Abstract

We are concerned with the optimal selection of multiple thresholds in image analysis. We propose the use of the Bayes information criterion, a minimal information measure, for this and illustrate its use in practical cases. Applications of multiple threshold selection of interest to us include the closely related problems of (i) quantization for lossy encoding, and (ii) segmentation. Our examples relate to segmentation as a post-processing phase in edge detection.