Filtering Using a Tree-Based Estimator

  • Authors:
  • B. Stenger;A. Thayananthan;P. H. S. Torr;R. Cipolla

  • Affiliations:
  • -;-;-;-

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

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Abstract

Within this paper a new framework for Bayesian tracking ispresented, which approximates the posterior distribution atmultiple resolutions. We propose a tree-based representationof the distribution, where the leaves define a partition ofthe state space with piecewise constant density. The advantageof this representation is that regions with low probabilitymass can be rapidly discarded in a hierarchical search,and the distribution can be approximated to arbitrary precision.We demonstrate the effectiveness of the technique byusing it for tracking 3D articulated and non-rigid motionin front of cluttered background. More specifically, we areinterested in estimating the joint angles, position and orientationof a 3D hand model in order to drive an avatar.