What is a Motion Detector?

Motion detection, translated in English as "Motion detection technology", is also commonly called motion detection, and is often used for unattended surveillance video and automatic alarm. The images collected by the camera at different frame rates will be calculated and compared by the CPU according to a certain algorithm. When there is a change in the picture, if anyone walks by, the lens is moved. The number calculated by the comparison result will exceed the threshold and indicate that the system The corresponding processing is made automatically.