BP神经网络的整个训练过程,实现了图像的加水印，去噪，加噪声等功能，包括最后计算压缩图像的峰值信噪比和压缩效果的源码。- The entire training process BP neural network, Realize image watermarking, de-noising, plus noise and other functions, Including the final calculation of the compressed image peak signal to noise ratio and compression of the source.