The Surveillance System or what is called a Closed Circuit Television System functions to control all activities visually (audio visual) in a certain area where a device in the form of a camera is installed. The function of which is to directly supervise, observe and record events in a certain place, room or area, this tool consists of: camera, digital video recorder and monitor which are integrated into an online network system or usually implemented manually internally. .
The purpose of everyone using CCTV is to monitor a large area and perhaps far from a location that is difficult to control and reach at the same time. Parts of the Surveillance system:
1. Camera (CCTV)
The function of the camera is to capture or take images and convert them into electrical signals. installed in the areas/places to be observed. In terms of function, cameras can be categorized according to needs and desires, such as: standard, dome, pin hole. Technologically, the types of cameras used are wireless, outdoor or indoor, and also functionally some can be moved (pan, tilt, zoom / PTZ).
The quality of the camera can be determined by several things such as:
The image sensor is: the part that functions to capture images. The higher the resolution and sensitivity (illumination), the better the quality. Image sensors that are often used are 0.25”, 1.3”, 0.5” and 1”. The ability to process signals on the controller such as automatic gain control, white balance, etc.
The function of the lens is to direct the image to the image sensor, the range and extent of the area you want to take the image is called focus.
2. Digital Video Recorder (DVR)
CCTV technology using a Digital Video Recorder is a technology that can be accessed/viewed from various places that already have a good computer network and online has high ability to access it and has been set up making it easier for users to be able to remotely remote image data sent.