一种基于混沌序列的数字水印算法

将载体彩色图像转换为灰度图像，通过密钥和阂值计算得到二值混沌序列，利用混沌序列把二值图像作为水印嵌入，实验结果证明该方法信息隐藏率高，隐蔽性好，且易于实现，能抵抗剪裁攻击，但是在遭到有损压缩的攻击时。随着压缩强度的加大，提取出的水印有所失真．

A Digital Watermarking Algorithm Based on Chaotic Sequences

Recent years digital watermarking has become one focus in the multimedia security study domain.This paper introduces one method to embed watermark in color image.After translating the color image into gray image,and using the keys and the threshold value to get the binary Chaotic Sequence, we use the binary Chaotic Sequence to embed binary image as a watermark in the translated gray image.This watermark has high hiding power,difficult to detect by human visual system and easy to realize and can resist the splitting attack.But with the increasing of compression intension,the extracted watermarking from the compressed image will have some distortion.