基于肤色的人脸检测,首先根据ntsc空间色调范围找到皮肤的联通区域，再切割这个联通区域的上4/10，逐步缩小联通区域，找到人脸的位置。-Face Detection Based on skin color, first find the location of the area of ​ ​ skin Unicom, China Unicom and then cut on 4/10 this area, gradually narrowing Unicom area, find the human face ntsc space according to the tonal range.