数字水印与版权保护

A REVIEW OF COPYRIGHT PROTECTION BY DIGITAL WATERMARKING TECHNIQUES

在Internet环境下 ,数字作品很容易被非法复制和扩散 ,知识产权得不到有效的保护 ,无疑会妨碍其健康有序的发展。因此 ,如何保护作品版权已受到人们高度重视。目前数字水印技术应用于版权保护领域的研究 ,日益成为国际上非常活跃的研究方向。本文首先介绍数字作品版权保护中对数字水印技术的特殊要求 ,以及数字水印技术基本原理。接着从水印检测的角度对目前水印算法进行划分。最后指出目前水印技术存在的局限 。

The digital media,including text,image,graphics,audio and video etc.,are very easy distributed through Internet,which provides us many advantages,but meanwhile,this gives rise to serious problems about intelligent properties including wide spread copyright violation,illegal copying,easy forging etc.How to provide copyright protection has drawn extensive attention in recent years,and the research on copyright protection by digi￣tal watermarking techniques has now become a very active direction.In the paper,we firstly describe the specific properties of watermarking techniques forced by the copyright protection applications.Then we give the basic principle of the techniques.Sequentially,we divide the algorithms from the points of watermark detection.Finally,we make a discussion on some limits of watermarking techniques and point out possible directions for further research.