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基于混沌置乱的DCT域灰度级盲水印算法
引用本文:赵永,王玲.基于混沌置乱的DCT域灰度级盲水印算法[J].信息安全与通信保密,2007(6):215-216.
作者姓名:赵永  王玲
作者单位:湖南师范大学物理与信息科学学院,湖南长沙410081
摘    要:文章首先运用混沌序列对灰度的图像水印进行置乱预处理,置乱后的每个水印图像像素进行位分解后依照系数量化的规则嵌入载体图像的8×8DCT块系数中的8个最低频系数中,同时实现了水印的盲提取。实验结果表明,该算法对JPEG有损压缩、图像剪切等常见的图像处理操作有较强的鲁棒性,具有一定的实用价值。

关 键 词:混沌置乱  灰度水印  离散余弦变换  盲提取
文章编号:1009-8054(2007)06-0215-02
修稿时间:2007年1月23日

A Gray-scale Blind Watermarking Algorithmin DCT Domain Based on Chaos Permutation
ZHAO Yong,WANG Ling.A Gray-scale Blind Watermarking Algorithmin DCT Domain Based on Chaos Permutation[J].China Information Security,2007(6):215-216.
Authors:ZHAO Yong  WANG Ling
Abstract:A chaotic sequence is used to scramble the gray-scale watermark.Each scrambled watermark pixel is first decomposed to eight bits,and after that,these bits are embedded into the eight lowest DCT frequency coefficients of the cover image.And however,the cover image is not required in the extraction of the watermark.The experiment results indicate that the algorithm is effective and robust to commom image processing operations and some geometric distor-tions such as JPEG compression and cropping.A conclusion can be made that the proposed algorithm is practical.
Keywords:Chaotic permutation  Gray-scale watermark  DCT  Blind extracting
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