Achieving Perimeter Security Detection Accuracy

The key to accurate perimeter security detection is to know the location of all objects so their size can be accurately determined. This information can be used to set size filters that eliminate movement that does not represent a security concern, while detecting human-sized intruders under all conditions.

Video perimeter security systems are designed to detect movement, but outdoors, everything moves. Trees and foliage, small animals, and blowing debris can overload security operators with perimeter security nuisance alarms and misdetects.

Geo-Registration and Perimeter Security Detection Accuracy

Accurate size filters are particularly important over large areas typical of site perimeters, where small objects close to the camera will appear much bigger than a person moving off in the distance. By knowing the precise location of the target, you can accurately measure the size of the target and apply size filters to eliminate movement that does not represent a security concern, while still detecting security intrusions under all conditions.

For example, a small animal near the camera might take up 50 times more area of the video image than a man in the distance. Yet a smart camera needs to ignore the animal while alerting on the man anywhere in the field of view. GPS technology is the key for obtaining this level of detection accuracy.

Geo-registration provides a number of additional benefits, including the ability to auto-steer PTZ cameras to an alarm’s precise location, and to display detected targets onto a sitemap of the facility to follow an intrusion in real time.