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Title:Detection of Emergency Events in Crowded Scenes
Authors: Ernesto Andrade ; Scott Blunsden ; Robert Fisher
Date:Jun 2006
Publication Title:IEE Int. Symp. on Imaging for Crime Detection and Prevention (ICDP 2006)
Page Nos:528-533
This paper evaluates a technique for detection of abnormal events in crowds. We characterise crowd behaviour by observing the crowd optical flow and use unsupervised feature extraction to encode normal crowd behaviour. The unsupervised feature extraction applies spectral clustering to find the optimal number of models to represent normal motion patterns. The motion models are HMMs to cope with the variable number of motion samples that might be present in each observation window. The results on simulated crowds analyse the robustness of the approach for detecting crowd emergency scenarios observing the crowd at local and global levels. The results on normal real data show the effectiveness in modelling the more diverse behaviour present in normal crowds. These results improve our previous work in the detection of anomalies in pedestrian data.
This paper is a postprint of a paper submitted to and accepted for publication in ICDP 2006 and is subject to IET copyright.
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Bibtex format
author = { Ernesto Andrade and Scott Blunsden and Robert Fisher },
title = {Detection of Emergency Events in Crowded Scenes},
year = 2006,
month = {Jun},
pages = {528-533},

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