中文说明：应用背景利用PCA(主元素分析)人脸识别，代码很详细，有详细的注解，有需要了解PCA降维的同学可下载学习。关键技术PCA(主元素分析)人脸识别，25张测试样本，25张训练样本，输入一张测试人脸图片识别出最相近的训练库中的人脸。代码详细好用，
English Description：
Application backgroundPCA (principal element analysis) face recognition, the code is very detailed, there are detailed notes, there is a need to understand the PCA dimension of the students can download learning.Key TechnologyPCA (principal element analysis) face recognition, 25 test samples, 25 training samples, a test face image recognition of the most similar training database in the face. Code details,