一种基于超混沌的水印算法

A Watermarking Algorithm Based on hyper-Chaotic

提出了一种基于超混沌的小波域数字图像水印算法.首先利用改进的Arnold变换,对二值原始水印图像进行置乱,再产生一超混沌序列对其加密,然后将水印信息嵌入原始图像小波域的低频系数,使得水印方案具有双重安全性.实验结果表明,该算法对JPEG压缩、图像加噪、剪切等攻击方式具有较强的鲁棒性,并且实现了盲检.

An approach based on wavelet domain hyperchaos digital image watermarking algorithm is presented.Firstly,the original binary watermark image is scrambled with improved Arnold transform and then the image is encrypted by a super-chaotic sequences.Secondly,the watermark data are embedded to the low frequency coefficients of the original deep wavelet domain,which make watermarking security double.Simulation shows that the algorithm has better robustness to resist the ordinary image processing,i.e.JPEG,compress,cut and so on.Furthermore,the origin picture is not necessary in the course of watermark extraction with this algorithm.