Ordinary people can also have video and audio conversations and communicate with each other on the Internet through the camera. In addition, people can also use it for various popular digital images, audio-visual processing and so on.
Cameras generally have the basic functions of video transmission and still image capture. After the image is collected by the lens, it is processed by the photosensitive element circuit and control element in the camera and converted into a digital signal that can be recognized by the computer, and then input into the computer through the parallel port or USB connection, and then the image is restored by software.
Cameras can be divided into digital cameras and analog cameras. Digital cameras can convert analog video signals generated by video acquisition equipment into digital signals, and then store them in computers.
The video signal captured by analog camera must be converted into digital mode by special video acquisition card and compressed before it can be converted into computer. Digital camera can shoot images directly, and then transmit them to computer through serial port, parallel port or USB interface.
The cameras in the computer market are mainly digital cameras, and digital cameras are mainly USB digital cameras with new data transmission interfaces, which are mostly visible in the market.