Paper
22 May 2013 Flow detection via sparse frame analysis for suspicious event recognition in infrared imagery
Henrique C. Fernandes, Marcos A. Batista, Celia A. Z. Barcelos, Xavier P. V. Maldague
Author Affiliations +
Abstract
It is becoming increasingly evident that intelligent systems are very bene¯cial for society and that the further development of such systems is necessary to continue to improve society's quality of life. One area that has drawn the attention of recent research is the development of automatic surveillance systems. In our work we outline a system capable of monitoring an uncontrolled area (an outside parking lot) using infrared imagery and recognizing suspicious events in this area. The ¯rst step is to identify moving objects and segment them from the scene's background. Our approach is based on a dynamic background-subtraction technique which robustly adapts detection to illumination changes. It is analyzed only regions where movement is occurring, ignoring in°uence of pixels from regions where there is no movement, to segment moving objects. Regions where movement is occurring are identi¯ed using °ow detection via sparse frame analysis. During the tracking process the objects are classi¯ed into two categories: Persons and Vehicles, based on features such as size and velocity. The last step is to recognize suspicious events that may occur in the scene. Since the objects are correctly segmented and classi¯ed it is possible to identify those events using features such as velocity and time spent motionless in one spot. In this paper we recognize the suspicious event suspicion of object(s) theft from inside a parked vehicle at spot X by a person" and results show that the use of °ow detection increases the recognition of this suspicious event from 78:57% to 92:85%.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Henrique C. Fernandes, Marcos A. Batista, Celia A. Z. Barcelos, and Xavier P. V. Maldague "Flow detection via sparse frame analysis for suspicious event recognition in infrared imagery", Proc. SPIE 8705, Thermosense: Thermal Infrared Applications XXXV, 870507 (22 May 2013); https://doi.org/10.1117/12.2015077
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KEYWORDS
Image segmentation

Video

Cameras

Infrared radiation

Infrared imaging

Surveillance systems

Video surveillance

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