说明：  这个程序是对一段avi视频进行人脸检测，要求背景比较简单，因为把膨胀腐蚀的部分去掉了，所以实时性还不错，下面的图片是取的其中的某一帧。
(This program is a avi video face detection, required background is relatively simple, because the expansion of some corrosion removed, so time was good, the following picture is taken in which a certain frame.)