Contour Tracking in Clutter: A Subset Approach

  • Authors:
  • Daniel Freedman;Michael S. Brandstein

  • Affiliations:
  • Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA. freedman@hrl.harvard.edu;Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA. msb@hrl.harvard.edu

  • Venue:
  • International Journal of Computer Vision
  • Year:
  • 2000

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Abstract

A new method for tracking contours of moving objects in clutter is presented. For a given object, a model of its contours is learned from training data in the form of a subset of contour space. Greater complexity is added to the contour model by analyzing rigid and non-rigid transformations of contours separately. In the course of tracking, multiple contours may be observed due to the presence of extraneous edges in the form of clutter; the learned model guides the algorithm in picking out the correct one. The algorithm, which is posed as a solution to a minimization problem, is made efficient by the use of several iterative schemes. Results applying the proposed algorithm to the tracking of a flexing finger and to a conversing individual's lips are presented.