【作者】 张齐；

【导师】 张佑生；

【作者基本信息】 合肥工业大学 ， 计算机应用技术， 2008， 硕士

【摘要】 信息隐藏是一种在不影响媒体原有功能和感官效果的情况下在其中加入附加的信息的技术。通常信息隐藏有两方面的功能,一种是以验证为目的,比如用于检测媒体版权和媒体来源的数字水印技术;另外一种就是以隐秘通信为目的的隐写技术。本文针对基于小波域的数字水印技术及隐写检测中的一些重要问题展开研究,主要做了以下几个方面的工作:1、系统介绍数字水印及隐写分析的发展现状、基本模型、特征、分类和应用,重点分析了现有典型技术的策略。2、基于对比较小波相关系数大小嵌入水印的方法的研究,提出了一种基于降频的数字水印算法,该方法具有较好的不可见性和抗JPEG压缩的能力,且对其他的攻击也具有一定的鲁棒性。3、从空间域和小波域提取图像特征值出发,设计了一种针对JPEG图像的图像信息隐藏盲检测算法,该算法可以较可靠的检测出含隐藏信息的图像。更多还原

【Abstract】 Information hiding refers to the technology of embedding some information to digital media. The embedded information convey addition information and maintaining the sense effect of the media. There are two functions of information hiding. One is to prove validity as it conveys addition information about the carrier for its copyright, ownership, distribution etc. Another, Steganography is to conceal the existence of communication by cover carriers.1、The states, basic model, characteristics, classification and applications of the digital watermarking and steganalysis of techniques are introduced.2、Presents a new watermarking coded algorithm based on reduced frequency based on algorithm that embed watermarking by compare frequency domain coefficients. It makes watermark better invisible , good robustness to JPEG compression and robust to many attacks.3、A image steganalysis method for JPEG pictures is proposed, in which features form spatical and DWT domains are selected to form a classifying model. Experiments show that this method could detect the hidden information efficiently.更多还原