PCA和KPCA程序，matlab实现，可用于模式识别时做降维或特征提取处理-PCA and KPCA program, matlab implementation, pattern recognition can be used to do when dealing with dimensionality reduction or feature extraction

图像识别中的降维算法，KPCA算法，主要使用了线性代数和矩阵的知识。-Image recognition of the descending dimension algorithm, KPCA algorithm, the main use of the knowledge of linear algebra and matrix

随着人脸识别越来越受到重视，而人脸识别中特征降维又很重要，所以特征降维算法也很重要。因此PCA降维算法很重要-Dimensionality reduction for Face Recognition