Survey on Face Detection Methods in Gray-level Still Images
静态灰度图像中的人脸检测方法综述

In recent twenty years,the technique of face detection and face recognition,as one of the important research area of computer vision and image understanding,attracts more and more attenion.In general,face detection in graylevel still images is more difficualt than that in color images.Therefore this paper briefly surveys this raes and indicates some issues for exploration.