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Special Feature

irandlow-lux camera Selection and installation

Setting up security systems in any environment that lacks adequate lighting is both challenging and demanding. Poor or non-existent lighting conditions require specific technology and installation techniques, as errors in the selection, installation, and application of cameras and their peripherals will affect performance quality. This article explores the selection and installation of infrared and night-vision/low-lux cameras. n By Alf ChAng

underStanding low-lux and night-ViSion cameraS The first step in the selection process of low-lux or night-vision cameras is an understanding of the various applications that require low-light and night-vision features, in addition to the camera specifications. This ensures that the most appropriate cameras are selected for the environment of the project in question. Low-lux surveillance generally refers to


FEB 2014

cameras that are able to capture images of viewable quality in low-light conditions without the need for auxiliary lights. Factors affecting performance include the combined effects of the sensors, the image processing unit, ISP/DSP, and the lens optics, all of which play a part in determining the actual performance of cameras under low-lux and night-vision conditions. The following are several ways to achieve the desired results.

Most Frequently Used: Low-Light Mode Cameras featuring this low-light, high-sensing mode — also known as low-light, full-color mode — utilize Super HAD, Ex-view/EXTRA-View CCD, or back-illuminated CMOS sensors. These sensors perform well in low-light conditions with good visibility and near-IR reactions. Cameras using this technology tend to perform well under various weather conditions and function as day/


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