Tracking groups of people is a highly informative task in surveillance, and it represents a still open and little explored issue. In this paper, we propose a brand new framework for group tracking, that consists in two separate particle filters, one focusing on groups as atomic entities (the multi-group tracker), and the other modeling each individual separately (the multi-object tracker). The latter helps the multi-group tracker in better defining the nature of a group, evaluating the membership of each individual with respect to different groups, and allowing a robust management of the occlusions. The coupling of the two processes is theoretically founded due to the revision of the posterior distribution of the multi-group tracker with the statistics accumulated by the multi-object tracker. Experimental comparative results certify the goodness of the proposed technique.

Collaborative Particle Filters for Group Tracking

BAZZANI, Loris;CRISTANI, Marco;MURINO, Vittorio
2010-01-01

Abstract

Tracking groups of people is a highly informative task in surveillance, and it represents a still open and little explored issue. In this paper, we propose a brand new framework for group tracking, that consists in two separate particle filters, one focusing on groups as atomic entities (the multi-group tracker), and the other modeling each individual separately (the multi-object tracker). The latter helps the multi-group tracker in better defining the nature of a group, evaluating the membership of each individual with respect to different groups, and allowing a robust management of the occlusions. The coupling of the two processes is theoretically founded due to the revision of the posterior distribution of the multi-group tracker with the statistics accumulated by the multi-object tracker. Experimental comparative results certify the goodness of the proposed technique.
2010
9781424479948
Video surveillance; Group Tracking; Particle Filtering; Multi-Target Tracking
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11562/343194
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