A boosting approach for supervised Mahalanobis distance metric learning

  • Authors:
  • Chin-Chun Chang

  • Affiliations:
  • Department of Computer Science and Engineering, National Taiwan Ocean University, Keelung 202, Taiwan

  • Venue:
  • Pattern Recognition
  • Year:
  • 2012

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Abstract

Determining a proper distance metric is often a crucial step for machine learning. In this paper, a boosting algorithm is proposed to learn a Mahalanobis distance metric. Similar to most boosting algorithms, the proposed algorithm improves a loss function iteratively. In particular, the loss function is defined in terms of hypothesis margins, and a metric matrix base-learner specific to the boosting framework is also proposed. Experimental results show that the proposed approach can yield effective Mahalanobis distance metrics for a variety of data sets, and demonstrate the feasibility of the proposed approach.