Automated video screening for unattended background monitoring in dynamic environments.

Carlson, Jeffrey J.

Sandia National Laboratories

关键词: Motion Detection Systems;    Cameras;    Monitoring;    Bombs;    99 General And Miscellaneous//Mathematics, Computing, And Information Science;   

DOI  :  10.2172/1029800
RP-ID  :  SAND2004-1253
RP-ID  :  AC04-94AL85000
RP-ID  :  1029800

美国|英语

来源: UNT Digital Library

【 摘 要 】

This report addresses the development of automated video-screening technology to assist security forces in protecting our homeland against terrorist threats. A threat of specific interest to this project is the covert placement and subsequent remote detonation of bombs (e.g., briefcase bombs) inside crowded public facilities. Different from existing video motion detection systems, the video-screening technology described in this report is capable of detecting changes in the static background of an otherwise, dynamic environment - environments where motion and human activities are persistent. Our goal was to quickly detect changes in the background - even under conditions when the background is visible to the camera less than 5% of the time. Instead of subtracting the background to detect movement or changes in a scene, we subtracted the dynamic scene variations to produce an estimate of the static background. Subsequent comparisons of static background estimates are used to detect changes in the background. Detected changes can be used to alert security forces of the presence and location of potential threats. The results of this research are summarized in two MS Power-point presentations included with this report.