一种很好的基于SIFT算子的人脸识别方法的介绍，文章有很不错。-A good SIFT-based operator of the introduction of face recognition method, there is a very good article.

基于SIFT特征提取_数字条纹投影的自适应3D人脸识别-Self-Adaptive 3D Face Recognition Using SIFT Extraction Based on Digital Fringe Projection