一种基于混沌映射的DCT域水印算法研究

安全性是数字水印的重要指标之一，基于混沌序列的优良性能，本文提出一种基于混沌映射的DCT 域水印算法。将混沌序列作为水印信息，加入到载体图像离散余弦变换（DCT）域的频率成分中去。利用了混沌序列的难以伪造性来提高水印的安全性，实验结果表明，该算法对于抵抗各种噪声、滤波和压缩等攻击具有很好的鲁棒性。
关键词： 数字水印；混沌；DCT 域；安全性；鲁棒性
Abstract: Security is one of the important requirements of digital watermarking. In the paper a
new digital watermarking algorithm based on chaos is proposed. This method uses chaos sequence to generate watermarking. After added it on to graph’s DCT transformation frequency component, because chaos sequence is hard to fabricate, so the security of digital watermarking is improved. Experimental results show that this algorithm is very robust against the typical image processing attacks such as noise , filtering and compression.
keyword: Digital watermarking；Chaos; DCT；Security；Robustness