Correctional facilities have a long history of hardening the prison perimeter to keep people from leaving the property. Yet problems persist, including the difficult challenge of stopping contraband coming from outside the prison walls. Given the size of prison perimeter security applications, it can been difficult to stop individuals from approaching a fence from the exterior and throwing packages that contain pre-paid cell phones, drugs, weapons and other contraband.
Prison Perimeter Security Challenges
Prisons face a number of challenges in securing their perimeters against contraband, beginning with the sheer size of the perimeters that must be secured, with much of the fence length vulnerable to objects coming in from outside. Prison perimeter security applications often border public spaces, so they require an early warning system and a level of detection that goes far beyond casual detection. A fence that borders public land offers an opportunity for any member of the general public to approach. Therefore, prisons need a way to extend that perimeter by creating some sort of buffer zone that doesn’t require purchasing additional land or installing additional fences.
Motion sensors and visible light cameras used for detection can generate a high number of false alarms caused by environmental conditions like precipitation, wind, darkness and reflected light. In a security situation where every alarm must be investigated, excessive nuisance alerts cannot be tolerated. Smart thermal cameras with video analytics can provide an effective solution to what has been a difficult problem by providing accurate alerts as well as coverage outside the fence line.
Solving Prison Perimeter Security Challenges with Technology
When combined with video analytics, SightSensor “smart” thermal cameras, which sense heat, are the perfect “people detector” and are highly accurate for automation detection. This is the reason smart thermal cameras have become the solution of choice for critical infrastructure protection at refineries, airports, bridges and correctional facilities, where intruders must be detected at all times and under all conditions.
Smart thermal cameras like the SightSensor incorporate GPS-based video analytics, enabling accurate determination of location, target size, bearing and speed. GPS-based video analytics also let you create geospatial “From To Zones” which only trigger alarms only when a person is walking towards a facility on the outside of the fence and stop contraband activities at the source of the problem. The video provided shows a from-to-zone in action.
GPS Analytics can also be used to steer PTZ cameras to zoom and follow a target automatically, helping to identify the source of an event and help make a fast and precise response.
While some prison perimeters are well-lit, many are not, leaving them particularly vulnerable to activities that occur at night. SightSensors use video processing to detect accurately 24 hours a day, in darkness, bright sun and harsh environmental conditions. The same video processing is also used to virtually eliminate nuisance alarms caused by small animals, weather and other anomalies. SightSensors also decrease the cost of a perimeter protection solution and increase security responsiveness by combining detection and visual verification into a single system.