实现了图像的加水印，去噪，加噪声等功能，最终的权值矩阵就是滤波器的系数，包括随机梯度算法，相对梯度算法。- Realize image watermarking, de-noising, plus noise and other functions, The final weight matrix is ??the filter coefficient, Including stochastic gradient algorithm, the relative gradient algorithm.