SVD进行特征脸提取，和PCA类似，选取前30个特征脸，并且将它显示这30个特征脸-SVD face feature extraction, and PCA is similar to the first 30 eigenfaces, and will it show that 30 eigenface

本程序详细区别了matlab中pca、svd、eig三个函数的区别和联系。对于学习pca有极大帮助-This program detailing the differences between the differences and connections in matlab pca, svd, eig three functions. Pca great help for learning

Principal components analysis is one of a family of techniques for taking high-dimensional data, and using the dependencies between the variables to represent it in a more tractable, lower-dimensional form, without losing too much information. PC