本文件实现的是对水印的加密及解密，有3种方式，猫脸变换，混沌置乱和zigzag置乱。-The file contains sseveral functions, which can encrypt and decrypt the watermark,including Arnold Transform,chaotic and zigzag.

用于图像加密和解密，里面包含了加密和解密的代码(Use for encrypted A image)