本网站上下载的混沌加密的m代码，通过logistic映射生成了混沌序列并调制，实现了对水印信息的预处理。-The website of the chaotic encryption of m code, through the logistic chaotic sequence generated mapping and modulation to achieve a pre-processing of watermark information.

产生超混沌序列，并实现了超混沌序列加密灰度图像位平面。-Produce ultra-chaotic sequence, and to achieve ultra-chaotic sequence encryption grayscale bit plane.