Naturally, light is fundamental in determining video surveillance image quality. Featuring a unique optical design, robust light level calculation, and proprietary image processing, the new IR technology enhances image quality and light performance in security applications and provides clear and uniform night-time images even under severe lighting conditions. There are two fundamental techniques included in this new IR revolution – Vari-angle IR (VAIR) and Adaptive IR (ADIR).
What’s new?
Vari-angle IR (VAIR): Designed for vari-focal IP cameras
When natural or artificial light is not available, IR illuminators are often used to enhance black and white night time images. Conventional IR illumination only covers a fixed general area. However, for long range PTZ surveillance, this limits the distance of the camera’s capable scope. Overcoming this limitation, the Vari-angle IR function on IP cameras are equipped with range adaptive IR which auto adjust the IR angles to precisely match the camera’s FoV without creating a hot-spot side effect.
VAIR function supports on IR surveillance cameras provides efficient, uniform IR lighting intensity. It is an ideal choice for customers who require the ability to clearly capture video images in complete darkness and to detect previously invisible objects in a broad coverage FoV with IR illumination.
Adaptive IR (ADIR): Designed for fixed-focal IP cameras
I P cameras with Adaptive IR feature provide regional-controlled LED technology to improve image quality and brightness. Through advanced optical design, regional control and image analysis technology assisted brightness control, these cameras provide vivid imagery during night time surveillance. When a subject (e.g., an intruder) approaches the camera, excessive IR illumination can cause over-exposure and render an image unusable. By automatically dimming lighting on a near subject, ADIR technology avoids over-illumination while ensuring consistent overall brightness and clarity of all background detail. They are an ideal option for users who require clear imagery of completely dark scenes.
How it works?
Vari-angle IR (VAIR)
Video surveillance requires a certain lux level of lighting to capture effective video images and in order to reliably detect people or objects. IR illumination is often used in poor lighting scenarios. Deploying the Vari-angle IR function on enabled network cameras will match the IR illumination to the camera’s lens angle. The optical zoom on speed dome IP cameras enables us ers to magnify their FoV with the performance of different IR illumination angles. The following table details the mapping between the optical zoom and the corresponding IR angle.
Adaptive IR (ADIR)
New Adaptive IR technology is designed with intelligence and control in mind. Adaptive IR divides image planes into multiple sections, with each section equipped with an independent IR control lighting device for regional illumination. This process ensures the retention of comprehensive details of any approaching subject while preserving clarity of the background image.
Summary
This revolutionary IR technology is an optical enhancement designed to empower users to view desired objects and capture video images with clear, identifiable detail in total darkness or at night. In low light environments, it is necessary to utilize these two techniques to produce usable image quality. With this intelligent technology, low light no longer means low vision.
