研究内容包括四个方面：分别是人脸检测，图像的预处理，特征提取和人脸识别。能在不同光照，不同表情，不同姿态的情况下获得准确的识别。-The study includes four aspects: face detection, image preprocessing, feature extraction and face recognition. The accurate identification can be obtained in the case of different light, different expressions, different posture.