稀疏的主成分分析基本概念，很好地学习这方面基本知识的材料-sparse Principal component analysis basic concepts, a good basic knowledge of learning materials in this regard

稀疏主成分分析用于脸部检测和识别的基础知识介绍。初学者很专业的入门材料。-Sparse principal component analysis for face detection and identification of the basics of introduction. Introductory material for beginners very professional.