When Overlapping Unexpectedly Alters the Class Imbalance Effects

  • Authors:
  • V. García;R. A. Mollineda;J. S. Sánchez;R. Alejo;J. M. Sotoca

  • Affiliations:
  • Lab. Reconocimiento de Patrones, Instituto Tecnológico de Toluca, Av. Tecnologico s/n, 52140 Metepec, México and Dept. Llenguatges i Sistemes Informátics, Universitat Jaume I, Av. S ...;Dept. Llenguatges i Sistemes Informátics, Universitat Jaume I, Av. Sos Baynat s/n, 12071 Castelló de la Plana, Spain;Dept. Llenguatges i Sistemes Informátics, Universitat Jaume I, Av. Sos Baynat s/n, 12071 Castelló de la Plana, Spain;Lab. Reconocimiento de Patrones, Instituto Tecnológico de Toluca, Av. Tecnologico s/n, 52140 Metepec, México and Dept. Llenguatges i Sistemes Informátics, Universitat Jaume I, Av. S ...;Dept. Llenguatges i Sistemes Informátics, Universitat Jaume I, Av. Sos Baynat s/n, 12071 Castelló de la Plana, Spain

  • Venue:
  • IbPRIA '07 Proceedings of the 3rd Iberian conference on Pattern Recognition and Image Analysis, Part II
  • Year:
  • 2007

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Abstract

This paper makes use of several performance metrics to extend the understanding of a challenging imbalanced classification task. More specifically, we refer to a problem in which the minority class is more represented in the overlap region than the majority class, that is, the overall minority class becomes the majority one in this region. The experimental results demonstrate that the use of a set of appropriate performance measures allows to figure out such an atypical case.