基于混沌置乱的小波域数字水印算法研究

提出了一种基于混沌系统的离散小波域数字图像水印算法,首先采用混沌模型算法来生成混沌随机序列对水印图像进行加密,然后对原始图像进行小波分解,将置乱加密的水印嵌入在在原始图像小波分解的高频系数中,含水印图像和待检测图像经过小波分解在对应小波系数中即可得到加密的水印信息,通过逆置乱即可得到提取的水印。实验证明该算法对叠加噪声和剪切等攻击具有很好的鲁棒性。

Research on Digital Watermarking Algorithm Based on Chaotic System in Wavelet Domains

A one dimensional chaotic system is applied to make the watermark image pre-processing,which images chaotic encryption.Using wavelet decompose Image,then embed watermark in the horizontal and vertical sub-band.Experimental results show that the algorithm embedded digital watermarking has good hiding and good robustness while noise and cut attack.