The real-time photography can be transmitted on the internet using video streaming format RTSP. We recommend choosing the camera model that has a wide dynamic photography function which can be used in any bad lighting environment to ensure the accuracy of facial recognition. Unlike the traditional closed-circuit surveillance system, the webcam can function independently. And without relying on professional image processing software, like video compression and smart image analysis, the webcam can be widely used in various fields, such as enterprises, merchants and domestic households