Design and Implementation of Entrance Guard System Based on Face Recognition

Aiming at the problems of the overexposure or underexposure of image acquisition in face recognition, a method of adjusting the illumination intensity is proposed: the relay is used to control the ambient illumination intensity of the camera, the stepping motor is used to control the illumination of the curtain, and the closed-loop feedback of image preprocessing and illumination intensity adjustment is used to solve the adaptive illumination intensity of the acquired image Problem. The method is simple and convenient in design, high in reliability and easy to implement in installation. In the PC, the camera collects image and face recognition, assisted by ultrasonic distance measurement and infrared detection of human body. Through the access control system equipped with infrared counter, the single-chip computer communicates with the PC through USB serial port to complete the coordinated operation of face recognition and access control system.