可以从一幅含有头和肩部的图像中检测出人脸，并用矩形框框起来，将矩形框中的人脸裁剪出来并另存为80*80的图片-Can be detected an image containing a head and shoulders of a person' s face, and the fr a me up with a rectangle, the human face of the rectangular box to cut out and save it as 80* 80 pictu