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Optical Engineering

Tracking of multiple-point targets using multiple-model-based particle filtering in infrared image sequence
Author(s): Mukesh A. Zaveri; Shabbir N. Merchant; Uday B. Desai
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Paper Abstract

Particle filtering is investigated extensively due to its importance in target tracking for nonlinear and non-Gaussian models. A particle filter can track an arbitrary trajectory only if the target dynamics models are known and the time instant when trajectory switches from one model to another model is known a priori. In real applications, it is unlikely to meet both these conditions. We propose a novel method that overcomes the lack of this knowledge. In the proposed method, an interacting multiple-model-based approach is exploited along with particle filtering. Moreover, we automate the model selection process for tracking an arbitrary trajectory. In the proposed approach, a priori information about the exact model that a target may follow is not required. Another problem with multiple trajectory tracking using a particle filter is data association, namely, observation to track fusion. For data association, we use three methods. In the first case, an implicit observation to track assignment is performed using a nearest neighbor (NN) method for data association; this is fast and easy to implement. In the second method, the uncertainty about the origin of an observation is overcome by using a centroid of measurements to evaluate weights for particles as well as to calculate the likelihood of a model. In the third method, a Markov random field (MRF)-based method is used. The MRF method enables us to exploit the neighborhood concept for data association, i.e., the association of a measurement influences an association of its neighboring measurement.

Paper Details

Date Published: 1 May 2006
PDF: 15 pages
Opt. Eng. 45(5) 056404 doi: 10.1117/1.2205858
Published in: Optical Engineering Volume 45, Issue 5
Show Author Affiliations
Mukesh A. Zaveri, Indian Institute of Technology (India)
Shabbir N. Merchant, Indian Institute of Technology (India)
Uday B. Desai, Indian Institute of Technology Bombay (India)


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