Switch control method of intelligent entrance guard

The invention discloses a switch control method of an intelligent entrance guard. The switch control method comprises the following steps: dividing an outdoor space to be monitored into an upper video scene domain and a lower video scene domain; alternatively acquiring the image information of the upper video scene domain and the image information of the lower video scene domain; adopting a frame difference method and Gauss background modeling to monitor whether a grayscale image moves or not; identifying the position area of a face image in the grayscale image, and presuming the practical position of the face in the video scenes according to the position area; carrying out calculated similarity and similarity sequence comparison of the characteristic values of parts of the face and know face data information in a face data storage area; and generating a control signal for driving an electric lock switch when the similarity reaches a preset similarity threshold. The switch control method enables the area to b