对于初学matlab的同学会有帮助，包含特征值与特征向量的提取、训练样本以及最后的识别，实现了图像的加水印，去噪，加噪声等功能。- Matlab for beginner students will help, Contains the eigenvalue and eigenvector extraction, the training sample, and the final recognition, Realize image watermarking, de-noising, plus noise and other functions.