实现了图像的加水印，去噪，加噪声等功能，包含特征值与特征向量的提取、训练样本以及最后的识别，进行逐步线性回归。- Realize image watermarking, de-noising, plus noise and other functions, Contains the eigenvalue and eigenvector extraction, the training sample, and the final recognition, Stepwise linear regression.