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Outlier Detection Using Ball Descriptions with Adjustable Metric

  • David M. J. Tax
  • Piotr Juszczak
  • Elżbieta Pękalska
  • Robert P. W. Duin
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4109)

Abstract

Sometimes novel or outlier data has to be detected. The outliers may indicate some interesting rare event, or they should be disregarded because they cannot be reliably processed further. In the ideal case that the objects are represented by very good features, the genuine data forms a compact cluster and a good outlier measure is the distance to the cluster center. This paper proposes three new formulations to find a good cluster center together with an optimized ℓ p -distance measure. Experiments show that for some real world datasets very good classification results are obtained and that, more specifically, the ℓ1-distance is particularly suited for datasets containing discrete feature values.

Keywords

one-class classification outlier detection robustness p-ball 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • David M. J. Tax
    • 1
  • Piotr Juszczak
    • 1
  • Elżbieta Pękalska
    • 2
  • Robert P. W. Duin
    • 1
  1. 1.Information and Communication Theory GroupDelft University of TechnologyDelftThe Netherlands
  2. 2.School of Computer ScienceUniversity of ManchesterManchesterUnited Kingdom

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