Multi-face scene effective face recognition device and method based on three-dimensional distance measurement

The invention discloses a multi-face scene effective face recognition device and method based on three-dimensional distance measurement. The face recognition device comprises a camera, a multi-face recognition module and an effective face pickup module. The camera collects and inputs face RGB images and face depth data in front of a screen, the multi-face recognition module obtains corresponding face depth data according to the face RGB images input by the camera, and the effective face pickup module calculates three-dimensional distances between all face targets and the center point of the screen according to the face depth data returned by the multi-face recognition module, and screens out a face target closest to the center point of the screen, and takes the face target as an effectiveface target to perform face payment. The method has the advantages that the problem that a conventional 3D camera cannot authenticate effective faces in a multi-face scene can be solved, the authentication of effective face o