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Improving Clustering-Based Background Modeling Techniques Using Markov Random Fields  

Hahn, Hee-Il (Department of Information and Communications Engineering, Hankuk University of Foreign Studies)
Park, Soo-Bin (Department of Information and Communications Engineering, Hankuk University of Foreign Studies)
Publication Information
Abstract
It is challenging to detect foreground objects when background includes an illumination variation, shadow or structural variation due to its motion. Basically pixel-based background models including codebook-based modeling suffer from statistical randomness of each pixel. This paper proposes an algorithm that incorporates Markov random field model into pixel-based background modeling to achieve more accurate foreground detection. Under the assumptions the distance between the pixel on the input imaging and the corresponding background model and the difference between the scene estimates of the spatio-temporally neighboring pixels are exponentially distributed, a recursive approach for estimating the MRF regularizing parameters is proposed. The proposed method alternates between estimating the parameters with the intermediate foreground detection and estimating the foreground detection with the estimated parameters, after computing it with random initial parameters. Extensive experiment is conducted with several videos recorded both indoors and outdoors to compare the proposed method with the standard codebook-based algorithm.
Keywords
Visual surveillance; Background subtraction; Pixel-based background modeling; Markov random fields;
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