变换域数字图像水印技术的研究

随着计算机和网络技术的飞速发展,多媒体信息的安全问题引起人们极大的关注.数字水印是信息安全领域的新技术,他作为版权保护和安全认证的有力工具已得到广泛的发展.简要介绍了数字图像水印技术的基本原理,着重分析了典型的变换域算法及常见的攻击方式和相应对策,通过对算法的研究,指出变换域数字图像水印的关键问题，就是水印嵌入的频带选择问题.

Study of the Transform Domain Digital Image Watermarking Technology

With the rapid developing technology of the computer and network ,the security of multimedia information has attracted a lot of attention. As a kind of potent tool for copyright protection and authentication,digital image watermarking technology is a new technology in the area of information security, has attracted a lot of attention and development. This paper introduces the basic principles simply. Typical methods of transform domain, common attacks and corresponding countermeasures are analyzed on emphasis, and we point out the key of digital image watermarking in transform domain is the problem of frequency choice for watermarking embedding.