20 May 2005 Automatic video surveillance of outdoor scenes using track before detect
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Abstract
This paper concerns automatic video surveillance of outdoor scenes using a single camera. The first step in automatic interpretation of the video stream is activity detection based on background subtraction. Usually, this process will generate a large number of false alarms in outdoor scenes due to e.g. movement of thicket and changes in illumination. To reduce the number of false alarms a Track Before Detect (TBD) approach is suggested. In this TBD implementation all objects detected in the background subtraction process are followed over a number of frames. An alarm is given only if a detected object shows a pattern of movement consistent with predefined rules. The method is tested on a number of video sequences and a substantial reduction in the number of false alarms is demonstrated.
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Morten Hansen, Morten Hansen, Helge B. D. Sorensen, Helge B. D. Sorensen, Christian M. Birkemark, Christian M. Birkemark, Bjarne Stage, Bjarne Stage, } "Automatic video surveillance of outdoor scenes using track before detect", Proc. SPIE 5778, Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security and Homeland Defense IV, (20 May 2005); doi: 10.1117/12.601989; https://doi.org/10.1117/12.601989
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