On Boosted and Adaptive Particle Filters for Affine-Invariant Target Tracking in Infrared Imagery

  • Guoliang Fan
  • Vijay Venkataraman
  • Li Tang
  • Joseph P. Havlicek
Part of the Advances in Pattern Recognition book series (ACVPR)

Abstract

We generalize the usual white noise acceleration target model by introducing an affine transformation to model the target aspect. This transformation is parameterized by scalar variables that describe the target shear, scale, and rotation and obey a first-order Markov chain. Our primary interest is in achieving robust Monte Carlo estimation in a complex state space under low signal-to-noise ratios, where a low-entropy unimodal likelihood function contributes to the failure of the conventional particle-filtering algorithms. Motivated by recently developed particle filter consistency checks, we develop a new track quality indicator that monitors tracking performance, triggering one of two actions as needed to improve the quality of the track. The first action is a boosting step, by which a local detector is defined based on the most recent tracker output to induce additional high-quality boosting particles. The original idea of boosting is extended here by encouraging positive interaction between the detector and the tracker. The second action is an adaptation step in which the system model self-adjusts to enhance tracking performance. In the context of affine-invariant target tracking, we compare these two techniques with respect to their effectiveness in improving the particle quality. We present experimental results that show that both techniques can improve the tracking performance by balancing the focus and the diversity of the particle distribution and by improving the particle filter consistency.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Guoliang Fan
    • 1
  • Vijay Venkataraman
    • 1
  • Li Tang
    • 1
  • Joseph P. Havlicek
    • 1
  1. 1.Oklahoma State UniversityStillwater

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