摘要
采用混沌动力系统中Logisitc映射数字水印的产生方式和Cox's扩频水印的嵌入方案,提出基于混沌序列的DCT域数字水印算法.该算法将数字灰度图像进行DCT变换以及把混沌序列添加到数字图像的DCT的交流系数中,从而获得数字水印图像.对所得的数字水印图像进行添加噪声、JPEG有损压缩,以及低通滤波等处理,结果表明:基于混沌序列的DCT域数字水印算法所获得的水印对常见的图像攻击具有较好的稳健性.
A novel watermarking algorithm based on DCT and chaotic sequences is proposed in this paper by combining the Logistic map of chaotic dynamics and the scheme of Cox's spread spectrum watermarking to produce watermarking image.The chaotic sequences are embedded to the AC coefficients of DCT.Experimental results demonstrate that the watermarking is better in againsting common image lossy copression,filtering and noise et al.
出处
《广西科学》
CAS
2005年第2期111-114,共4页
Guangxi Sciences
基金
国家自然科学(10147201)
广西高校百名中青年学科带头人(桂教人[2002]467号)资助项目。
关键词
数字水印
混沌序列
离散余弦变换
逆离散余弦变换
算法
digital watermarking,chaotic sequences,discrete cosine transform,inverse discrete cosine transform,algorithm
