Illumination quality (IQ) test

CCTV Handbook 2011 CCTV, Surveillance & Remote Monitoring

Lighting is a critical aspect of surveillance.

Run through this quick 10-point check every time you specify or install a CCTV system.

1. Is white-light or infrared illumination required?

2. Ensure the horizontal angle of illumination covers the full field of view

To provide high quality images is essential. Simply match the illumination to the field of view of the lens using a lens calculator.

3. What is the maximum distance to illuminate?

Specify the illuminator model based on the illumination angle and distance required.

4. If white-light is needed, ensure that colour corrected white-light is used.

Check that red, green and blue colours can all be seen accurately during night-time operation.

5. If Infrared is needed specify the wavelength carefully.

Lower wavelengths such as 850 nm provide greater distances. Longer wavelengths such as 950 nm provide covert illumination but achievable distances are reduced and there is an increased risk of focus shift between day and night.

6. Consider the maintenance and running costs of the illumination system.

Ensure that long life, low consumption lighting is used.

7. Consider the positioning of the lighting.

It should be fitted so that no camera is looking directly at a light source. The best solution is mounting the illumination at the camera position. Also, consider any line of sight obstacles. As light travels in straight lines, any obstacles such as overgrown foliage will create shadows.

8. Consider the camera and lens.

A high performance camera and lens will provide higher quality images with CCTV lighting. Lower performance camera and lens combinations will require additional lighting to provide similar results.

9. If the illumination is being used with a fully functional dome camera then a choice must be made between wide angle illumination, local area illumination or target area illumination.

Wide-angle illumination is preferential as it can provide 360° lighting for the dome.

10. Is light pollution a critical factor?

Using white-light ensure that the illuminators are pointing down to minimise light pollution. If no light pollution is permissible then infrared lighting must be used.

Technical Tip

If the exact field of view is unknown, adaptive illumination products can be used to provide vari-focal lighting.

Technical Tip

Even illumination – every CCTV lighting system should provide even illumination.

For more information contact Geutebrück, +27(0)11 867 6585, Charles@geutebruck.co.za, www.geutebruck.com





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...