基于DCT域的图像数字水印技术  

DCT-based image digital watermarking

作　　者：欧阳琦[1] 李炳法[1] 林春蔷[1] 庞坚[1] 高东妮[1] 

机构地区：[1]四川大学计算机学院,成都610065

出　　处：《信息技术》2005年第9期20-23,共4页Information Technology

摘　　要：采用了DCT离散余弦变换的算法,对图像这种多媒体数字作品进行了数字水印的嵌入和检测研究。并且使用了MATLAB来介绍了一种DCT域的图像数字水印嵌入和提取的实例,在最后对嵌入水印的图像进行了攻击实验,验证了该算法的鲁棒性和不可见性。This paper proposes an algorithm based on DCT, which can embed and extract watermark from an image, then it uses MATLAB to propose an example of image digital watermarking in DCT. At last, this paper uses geometric processing functions of MATLAB image toolbox to attack the embedded image. After these attacks, the watermark sequence can be detected all the same. It establishes that the algorithm is robust and invisible.

关 键 词：数字水印 信息隐藏 离散余弦变换 

分 类 号：TN911.73[电子电信—通信与信息系统]