A Unifying Approach to Hard and Probabilistic Clustering

  • Authors:
  • Ron Zass;Amnon Shashua

  • Affiliations:
  • The Hebrew University;The Hebrew University

  • Venue:
  • ICCV '05 Proceedings of the Tenth IEEE International Conference on Computer Vision (ICCV'05) Volume 1 - Volume 01
  • Year:
  • 2005

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Abstract

We derive the clustering problem from first principles showing that the goal of achieving a probabilistic, or "hard", multi class clustering result is equivalent to the algebraic problem of a completely positive factorization under a doubly stochastic constraint. We show that spectral clustering, normalized cuts, kernel K-means and the various normalizations of the associated affinity matrix are particular instances and approximations of this general principle. We propose an efficient algorithm for achieving a completely positive factorization and extend the basic clustering scheme to situations where partial label information is available.