基于MATLAB的DCT域图像水印的研究

数字水印技术是是通过一定的算法将作者的版权信息嵌入到多媒体数据中,以起到版权保护、秘密通信、数据文件的真伪鉴别等作用。本文主要针对静止图像上的信息隐藏技术进行研究。首先介绍了目前信息隐藏技术的发展背景,接着引入信息隐藏的概念、特征及通用模型,然后介绍了信息隐藏的主要分支,并着重介绍了变换域内的信息隐藏,最后在此基础上讨论了基于DCT变换的信息隐藏技术。实验结果表明,本文提出的方法不但可以抵抗几何裁剪、加噪的攻击,而且具有很好的鲁棒性。

Research on Image Watermark Based Discrete Cosine Transform by MATLAB

Digital Watermark is embedding the auctorial copyright information in multimedia via some determinate arithmetic in order to implement these objectives as protecting copyright,secret communications,distinguish truer digital file from dummy.The paper lays its emphases on the techniques of information hiding in still images.First,the background of data-hiding research is surveyed.Then we introduce the conceptions,characteristics and the general model of information hiding.The main branches of information hiding are also presented,together with the data hiding methods based on the spectral analysis.And finally,we turn our attention to the information hiding approach based on DCT.The experimental results show that,the proposed method is not only stick up to attack as cutting and adding noise,but also have better robust.