On-Line Selection of Discriminative Tracking Features

  • Authors:
  • Robert T. Collins;Yanxi Liu

  • Affiliations:
  • -;-

  • Venue:
  • ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
  • Year:
  • 2003

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Abstract

This paper presents a method for evaluating multiple feature spaceswhile tracking, and for adjusting the set of features used toimprove tracking performance. Our hypothesisis that the featuresthat best discriminate between object and background are also bestfor tracking the object. We develop an on-line feature selectionmechanism based on the two-class variance ratio measure, applied tolog likelihood distributions computed with respect to a givenfeature from samples of object and background pixels. This featureselection mechanism is embedded in a tracking system thatadaptively selects the top-ranked discriminative features fortracking. Examples are presented to illustrate how the methodadapts to changing appearances of both tracked object and scenebackground.