A surveillance system specifically developed to manage crowded scenes is described in this paper. In particular we focused on static crowds, composed by groups of people gathered and stayed in the same place for a while. The detection and spatial localization of static crowd situations is performed by means of a One Class Support Vector Machine, working on texture features extracted at patch level. Spatial regions containing crowds are identified and filtered using motion information to prevent noise and false alarms due to moving flows of people. By means of one class classification and inner texture descriptors, we are able to obtain, from a single training set, a sufficiently general crowd model that can be used for all the scenarios that shares a similar viewpoint. Tests on public datasets and real setups validate the proposed system.

Detection of static groups and crowds gathered in open spaces by texture classification / Manfredi, Marco; Vezzani, Roberto; Calderara, Simone; Cucchiara, Rita. - In: PATTERN RECOGNITION LETTERS. - ISSN 0167-8655. - STAMPA. - 44:(2014), pp. 39-48. [10.1016/j.patrec.2013.11.001]

Detection of static groups and crowds gathered in open spaces by texture classification

MANFREDI, MARCO;VEZZANI, Roberto;CALDERARA, Simone;CUCCHIARA, Rita
2014-01-01

Abstract

A surveillance system specifically developed to manage crowded scenes is described in this paper. In particular we focused on static crowds, composed by groups of people gathered and stayed in the same place for a while. The detection and spatial localization of static crowd situations is performed by means of a One Class Support Vector Machine, working on texture features extracted at patch level. Spatial regions containing crowds are identified and filtered using motion information to prevent noise and false alarms due to moving flows of people. By means of one class classification and inner texture descriptors, we are able to obtain, from a single training set, a sufficiently general crowd model that can be used for all the scenarios that shares a similar viewpoint. Tests on public datasets and real setups validate the proposed system.
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Detection of static groups and crowds gathered in open spaces by texture classification / Manfredi, Marco; Vezzani, Roberto; Calderara, Simone; Cucchiara, Rita. - In: PATTERN RECOGNITION LETTERS. - ISSN 0167-8655. - STAMPA. - 44:(2014), pp. 39-48. [10.1016/j.patrec.2013.11.001]
Manfredi, Marco; Vezzani, Roberto; Calderara, Simone; Cucchiara, Rita
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1012720
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