CCTV Camera Information

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CCTV Camera Information
CCTV camera (cctv security camera. image by wrangler from Fotolia.com)

CCTV (closed-circuit television) cameras are used in department stores and car parks, and on highways and city streets; many people are also installing them in their homes. People who live in London are videotaped an average of 80,000 times each year.

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Closed Circuit

Closed-circuit cameras refer to cameras that are hard-wired, as opposed to being transmitted like a TV station broadcast. CCTV cameras use a coaxial cable to send the signal to a security DVR or computer.

Cameras

CCTV cameras come in a variety of types, each used for a specific purpose. There are stationary cameras, cameras which can move, cameras which can see in total darkness, cameras that can zoom and cameras that can track motion.

PTZ Cameras

PTZ (pan-tilt-zoom) cameras can be moved from side to side (panning), moved up and down (tilting) and zoomed to see a number plate from hundreds of yards away.

Night Cameras

IR (infrared) cameras can see in total darkness. They use a group of IR LEDs (light-emitting diodes) to illuminate their field of view. IR is just outside the range of light that humans can see, but IR cameras can use this light to display a black and white picture.

Motion Tracking

Motion tracking cameras can detect motion and track and record the moving object.

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