There are no cameras in the general ward, only in the public **** area, such as corridors, halls, silver desk, pharmacy and other places. Camera (CAMERA or WEBCAM), also known as computer camera, computer eye, electronic eye, etc., is a kind of video input device, is widely used in video conferencing, telemedicine and real-time monitoring. Ordinary people can also talk and communicate with each other over the Internet with images and sound through cameras. In addition, it can also be used for a variety of popular digital video, audio and video processing.
Cameras can be divided into two categories: digital cameras and analog cameras. Digital cameras can convert analog video signals generated by video capture devices into digital signals, which can then be stored in a computer. The video signal captured by an analog camera must be converted to digital mode by a specific video capture card and compressed before it can be converted to a computer. A digital camera captures the image directly and then transfers it to the computer via serial, parallel, or USB ports.