摘要
本文提出了一种有意义的基于傅立叶变换的水印方法。在嵌入水印之前首先对水印信息利用Amold变换进行置乱,然后采用修改中高频部分的方法进行嵌入，嵌入水印时采用嵌入两个不相关伪随机序列的方法。实验结果表明，该方法提高了水印的安全性，提高传统相关性检测方法的准确率并且提高了鲁棒性。
This thesis provides a meaning watermark algorithm based on DFT. The watermark data was scrammed with Arnold transform before embedding, then modify the high and the middle frequency part to embedding, embedding watermark adopt embedding two not related, The experiment results shows that, this algorithim enhances the security, increases the accurate rate of the traditional relativity examination and the robustness.
作者
李翔
高尚兵
陈昊
LI Xiang,GAO Shang-bing,CHEN Hao（1.Department of Computer Engineering,Huaiyin Institute of Techlonogy,Huaiyin 223001, China;2. Personnel Authority,Huai＇an 223001, China）
出处
《电脑知识与技术》
2008年第2期751-753,757,共4页
Computer Knowledge and Technology
关键词
数字水印
傅立叶变换
信息安全
Digital watermarking
Fourier transform
information security
