实现人脸检测 主要是针对裸露肌肤检测，从而实现对*图像的过滤，用了rgb，hsv，ycrcb，纹理检测等多种方法，可以运行，效果不错-Implementation of face detection is mainly directed against the bare skin testing, in order to achieve the filtering of pornographic images, using the rgb, hsv, ycrcb, texture detect