基于二维混沌映射的图像水印算法

根据混沌具有的随机性、对初始条件的极端敏感性等特点,本文提出了一种基于二维同余混沌映射的数字图像水印算法。将经过二维混沌映射置乱后的数字水印信号嵌入图像小波域的低频系数,保证了数字水印的隐蔽性、保密性和稳固性,同时实现了水印的盲提取;利用二维混沌同余映射对水印信号进行置乱,提高了水印的安全性,实验结果表明,该算法对于抵抗图像的攻击具有很好的鲁棒性。

A image watermark algorithm based on two-dimensional chaotic

According to chaos with randomness, the extreme sensitivity to initial conditions and so on, in this paper presents a two-dimensional chaotic maps based on digital image watermarking algorithm. Two-dimensional chaotic map will be scrambling after the digital watermark signal embedded image signal of the low-frequency coefficients in wavelet domain to guarantee a digital watermark invisibility, security and stability, while achieving a blind watermark extraction~ the use of two-dimensional chaotic maps scrambling watermark signal improve the security of the watermark, experimental results show that the algorithm has a good robustness for the attacks against.