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Foreground-Adaptive Background Subtraction

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4 Author(s)
McHugh, J.M. ; Dept. of Electr. & Comput. Eng., Boston Univ., Boston, MA ; Konrad, J. ; Saligrama, V. ; Jodoin, P.

Background subtraction is a powerful mechanism for detecting change in a sequence of images that finds many applications. The most successful background subtraction methods apply probabilistic models to background intensities evolving in time; nonparametric and mixture-of-Gaussians models are but two examples. The main difficulty in designing a robust background subtraction algorithm is the selection of a detection threshold. In this paper, we adapt this threshold to varying video statistics by means of two statistical models. In addition to a nonparametric background model, we introduce a foreground model based on small spatial neighborhood to improve discrimination sensitivity. We also apply a Markov model to change labels to improve spatial coherence of the detections. The proposed methodology is applicable to other background models as well.

Published in:

Signal Processing Letters, IEEE  (Volume:16 ,  Issue: 5 )