基于混沌系统与提升小波的抗剪切攻击的彩色图像盲水印算法

研究了混沌序列、提升小波在彩色图像盲水印中的应用,给出一种新的基于混沌序列和提升小波的抗剪切变换攻击的彩色图像盲水印算法。算法同时采用两种不同的混沌序列,提高了算法的安全性;根据HVS特性使中低频使用不同的算法自适应地嵌入水印,使算法有了很好的隐藏效果;使用提升小波变换提高了算法的效率;对受严重攻击后提取出的水印进行优化处理,使算法有了很好的鲁棒性。实验证明该算法具有较高的效率、较好的隐藏效果、很好的安全性和鲁棒性,尤其在抗剪切攻击方面格外显著。

A New Color Digital Image Blind Watermarking Algorithm Protecting from Shear Transformation Attack Based on Chaotic Sequences and LWT

Based on chaotic sequences and LWT （lifting wavelet transformation）,a blind watermarking of color digital image algorithm protecting from shear transformation attack is given.Making use of feature of HVS,the watermark image is embedded into the color image＇s low frequency component and middle frequency components by different means.The algorithm has highly security for using expanding frequency treatment and two kinds of chaotic mappings to scramble the watermark image.The algorithm has highly efficiency for using the LWT.Experiments indicate that the algorithm has high efficiency,strong robustness and security,and particularly it can protect from shear transformation attack.