中文说明：实现了图像的加水印，去噪，加噪声等功能，是信号处理的基础，关于神经网络控制，利用自然梯度算法，ldpc码的编解码实现，计算互信息非常有用的一组程序。
English Description：
Realize Image Watermarking, noise reduction, plus features such as noise, signal processing based on neural network control based on natural gradient algorithm, encoding and decoding of LDPC codes implemented a set of procedures for calculating mutual information is useful.