nao机器人自带的人脸识别功能的实现，以及基于人脸识别的人数统计。-Nao robot comes with the realization of the function of face recognition, as well as the number of statistics based on the face recognition.

可以用来识别视频中的人数，识别物体的数目。(Can be used to identify the number of people in the video, the number of objects identified.)