Thermal camera that counts on safety

May 2002 CCTV, Surveillance & Remote Monitoring

Safety in places such as football grounds and nightclubs could be improved by a people-counting thermal camera developed by a UK company called Irisys.

The high-performance sensing technology is aimed at bridging the gap between expensive, accurate and high-definition imagers used in sophisticated military applications and the simple, low-cost infrared-beam sensors used in homes and offices to trigger automatic doors and turn on lights.

The essential technical difference between these two application extremes is resolution. A military imaging system supports a resolution of more than 100 000 pixels, while the simple intruder detectors and automatic door systems are based on single-element sensors that can only register a change in radiant energy in their field of view.

The infrared integrated systems (Irisys) detector counts the number of people in the field of view irrespective of the lighting conditions. It can even find out the speed and direction in which people are moving, their sizes and how long they have been in the field of view.

The equipment has a detector array comprising 256 elements formed by a pattern of electrodes on the surface of an electronic chip. It is connected to a silicon chip that controls the output of the detector elements and allows the data to be processed.

A viewing window attached to the detector has a filter that selects the radiation wavelength that falls on the element. Because a human body radiates most intensely around 10 µ, a filter is chosen to let in this radiation to detect people.

Most importantly, the detector is accurate and only responds to changes in temperature. It can detect a temperature change of up to 0,5°C, thereby avoiding individual static objects in view known as 'scene clutter' and saving a lot of computing power compared with video-based systems.

Irisys

shollock@irisys.co.uk





Share this article:
Share via emailShare via LinkedInPrint this page



Further reading:

Reinventing network camera security
Issue 1 2020, Axis Communications SA , CCTV, Surveillance & Remote Monitoring
Now in its seventh generation and celebrating its 20th anniversary, the Axis ARTPEC chip was launched in 1999 designed to optimise network video.

Read more...
Cloud-based fleet and driver management
Issue 1 2020, Graphic Image Technologies , CCTV, Surveillance & Remote Monitoring
Graphic Image Technologies (GIT) has announced the availability of a cloud-based dashcam designed to improve on-the-road behaviour and assist in improving fleet management.

Read more...
Cathexis specialises in integration
Issue 1 2020, Cathexis Technologies , CCTV, Surveillance & Remote Monitoring
The integration of multiple systems is intrinsic and essential to the goal of creating an effective and efficient operational environment.

Read more...
Do wireless networks meet modern surveillance demands?
Issue 1 2020, Duxbury Networking, RADWIN , CCTV, Surveillance & Remote Monitoring
It is predicted that video will account for 15,1 zettabytes (1 zettabyte = 1 trillion gigabytes) of data annually, which is more than any other IoT application.

Read more...
Traffic doesn’t have to be this way
Issue 1 2020, Dahua Technology South Africa, Axis Communications SA , CCTV, Surveillance & Remote Monitoring
More effective traffic management is something that would save us all a lot of frustration and wasted time, and it’s one of the areas where AI and big data can have a significant impact.

Read more...
Dahua launches Hunter Series
Issue 1 2020, Dahua Technology South Africa , CCTV, Surveillance & Remote Monitoring
Dahua launches a new dual-PTZ camera that enables flexible and multi-scene panoramic monitoring.

Read more...
8 MP fisheye camera
Issue 1 2020, Dallmeier Electronic Southern Africa , CCTV, Surveillance & Remote Monitoring
Dallmeier’s new 8 MP fisheye camera combines AI-supported object classification and H.265 in a compact design.

Read more...
Using ANPR to enhance security
Issue 1 2020, Duxbury Networking , CCTV, Surveillance & Remote Monitoring
Deep learning and AI-based algorithms enable ANPR cameras and their associated software to detect and recognise number plates with an extremely high level of accuracy.

Read more...
AI supercharges surveillance
Issue 1 2020 , CCTV, Surveillance & Remote Monitoring
The ability to analyse live video through AI techniques means that untapped footage from existing, passive cameras can be used to identify patterns, trends and anomalies.

Read more...
IDIS launches new cameras with on-board analytics
Issue 1 2020 , CCTV, Surveillance & Remote Monitoring
IDIS has launched a lineup of Edge VA bullet and dome cameras, featuring on-board analytics that will transform the efficiency of security operations.

Read more...