Robust Real-Time Unusual Event Detection using Multiple Fixed-Location Monitors

We present a novel algorithm for detection of certain types of unusual events. The algorithm is based on multiple local monitors which collect low-level statistics. Each local monitor produces an alert if its current measurement is unusual and these alerts are integrated to a final decision regarding the existence of an unusual event. Our algorithm satisfies a set of requirements that are critical for successful deployment of any large-scale surveillance system. In particular, it requires a minimal setup (taking only a few minutes) and is fully automatic afterwards. Since it is not based on objects' tracks, it is robust and works well in crowded scenes where tracking-based algorithms are likely to fail. The algorithm is effective as soon as sufficient low-level observations representing the routine activity have been collected, which usually happens after a few minutes. Our algorithm runs in real-time. It was tested on a variety of real-life crowded scenes. A ground-truth was extr...

• Type: Journal
• Year: 2008
• Where: PAMI
• Authors: Amit Adam, Ehud Rivlin, Ilan Shimshoni, David Reinitz
• Keywords: Algorithm, Local Monitor, PAMI 2008, Unusual Event