Evaluation of diversity measures for binary classifier ensembles

  • Authors:
  • Anand Narasimhamurthy

  • Affiliations:
  • Department of Computer Science and Engineering, The Pennsylvania State University

  • Venue:
  • MCS'05 Proceedings of the 6th international conference on Multiple Classifier Systems
  • Year:
  • 2005

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Abstract

Diversity is an important consideration in classifier ensembles, it can be potentially expolited in order to obtain a higher classification accuracy. There is no widely accepted formal definition of diversity in classifier ensembles, thus making an objective evaluation of diversity measures difficult. We propose a set of properties and a linear program based framework for the analysis of diversity measures for ensembles of binary classifiers. Although we regard the question of what exactly defines diversity in a classifier ensemble as open, we show that the framework can be used effectively to evaluate diversity measures. We explore whether there is a useful relationship between the selected diversity measures and the ensemble accuracy. Our results cast doubt on the usefulness of diversity measures in designing a classifier ensemble, although the motivation for enforcing diversity in a classifier ensemble is justified.