You would have surely heard the term CCTV, but perhaps you did not understand what it means. CCTV stands for closed circuit television. So CCTV camera refers to a camera connected to a series of television screens or monitors which have a fixed predefined location. Unlike digital television that broadcasts programs by employing digital transmissions for delivering images to any location, CCTV cameras deliver images to selected fixed sites, which are connected via wiring or radio waves that the receivers recognize. These are often used for the purpose of video surveillance.
Germany was the first country to use CCTV for keeping track of the rockets during their launching at the time of WWII. The CCTV was invented by a German named Walter Bruch, who is better known for having invented the color television. Till today, the same technology is employed for locating problems faced during rocket launching. The police started using such cameras during the late 60s to save businesses and general public from crimes. These days, they are frequently used in stores, casinos, banks and even private properties. These are also used for monitoring industrial processes and traffic at public places and buses, subways and trains. UK employs CCTVs mainly for security applications.
CCTVs come with many features. They are designed to tilt, scan across a room and even collect images when it’s dark. Some CCTV cameras will come equipped with advanced features for getting precise photos of small items from a large distance, and also identify colors. They may also have VCA feature (Video content analysis.) VCA connects the camera to computers, which allow the users to navigate through the video recording for spotting doubtful movements and particular objects, like an unidentifiable person loitering around the scene of crime or a black van. Some cameras are designed for recognizing faces to help identifying a person through movements or facial features. The control of these cameras is done from a control room, which may be in a different section of the building or even in an entirely different building.