Publications Details
An infrared imaging area sensor for tactical and physical security applications
Thermal imagers are effective tools for detecting aggressive actions and enhancing physical security in both tactical and peacetime environments. However, from an operator's perspective, these devices are rarely used on a continuous basis because of inconvenience and a requirement to have the operator be the detector'' while using the imager as a sensor. This paper describes an area sensor and assessment system designed to reduce operator fatigue and improve the effectiveness of costly thermal imagers. Several prototypes have been installed and operated at sites worldwide. The device uses a thermal imager as the primary sensor but also incorporates a laser rangefinder, automatic area precision scanning, robust scan-to-scan scene change detection, a deliberate-motion detection features. The system setup, control, and alarm assessment functions of the operator console are described. The digital processing is discussed and performance measures are given. 2 refs., 7 figs.