Object tracking using CamShift algorithm and multiple quantized feature spaces

  • Authors:
  • John G. Allen;Richard Y. D. Xu;Jesse S. Jin

  • Affiliations:
  • University of Sydney, NSW;University of Sydney, NSW;University of Sydney, NSW

  • Venue:
  • VIP '05 Proceedings of the Pan-Sydney area workshop on Visual information processing
  • Year:
  • 2004

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Abstract

The Continuously Adaptive Mean Shift Algorithm (CamShift) is an adaptation of the Mean Shift algorithm for object tracking that is intended as a step towards head and face tracking for a perceptual user interface. In this paper, we review the CamShift Algorithm and extend a default implementation to allow tracking in an arbitrary number and type of feature spaces.In order to compute the new probability that a pixel value belongs to the target model, we weight the multidimensional histogram with a simple monotonically decreasing kernel profile prior to histogram back-projection.We evaluate the effectiveness of this approach by comparing the results with a generic implementation of the Mean Shift algorithm in a quantized feature space of equivalent dimension.The aim if this paper is to examine the effectiveness of the CamShift algorithm as a general-purpose object tracking approach in the case where no assumptions have been made about the target to be tracked.