Crowd control by multiple cameras

Conference paper (2009)
Department
Intelligent Systems (EEMCS) (TU Delft)
Copyright: CC Creative Commons
Computer vision Scenarios Bayesian reasoning Scripts
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Published Date

10-05-2009

Reuse Rights

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Source:

ISCRAM 2009: Proceedings of the 6th International Conference on Information Systems for Crisis Response and Management, Gothenborg, Sweden, 10-13 May 2009

ISBN:

978-91-633-4715-3

Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Intelligent Systems

Abstract

One of the goals of the crowd control project at Delft University of Technology is to detect and track people during a crisis event, classify their behavior and assess what is happening. The assumption is that the crisis area is observed by multiple cameras (fixed or mobile). The cameras sense the environment and extract features such as the amount of motion. These features are the input to a Bayesian network with nodes corresponding to situations such as terroristic attack, fire, and explosion. Given the probabilities of the observed features, by reasoning, the likelihood of the possible situations can be computed. A prototype was tested in a train compartment and its environment. Forty scenarios, performed by actors, were recorded. From the recordings the conditional probabilities have been computed. The scenarios are designed as scripts which proved to be a good methodology. The models, experiments and results will be presented in the paper.