Camera (CAMERA or WEBCAM) is a video input device, a type of closed-circuit television, is widely used in video conferencing, telemedicine and real-time monitoring. Camera generally has a video photography, dissemination and static image capture and other basic functions, is by the lens to capture images, by the camera within the light-sensitive components of the circuit and control components of the image processing and converted into digital signals that can be recognized by the computer, and then by the parallel port, the USB connection, and then input to the computer by the software and then restore the image, thus forming the picture.