【作者】 祁强；

【导师】 陈建安；

【作者基本信息】 西安电子科技大学 ， 电路与系统， 2004， 硕士

【摘要】 论文首先介绍了数字水印和信息隐藏的概念，对当前数字水印和信息隐藏的研究现状进行了综述，并介绍了这项技术可能的应用领域。然后对数字水印算法模型、分类以及典型算法进行了简要的分析。在此基础上，研究了图像离散余弦变换域中盲水印的嵌入算法，利用人类视觉系统的特点确定嵌入强度，在对嵌入信息的提取时利用图像的线性相关性，并对算法进行了详细的理论分析和推导，实验结果取得了和理论分析的一致。然后，研究算法的嵌入域为图像的小波变换域，嵌入算法利用小波变换域图像压缩的视觉模型保证了结果图像的视觉质量。嵌入的信息检测时，利用了图像的线性相关性。文章对算法进行了详细的理论分析和推导，实验结果验证了该算法的有效性。最后，对全文工作进行了总结，并就进一步的研究工作提出了几点建议。更多还原

【Abstract】 In this paper, the author firstly makes an introductory review on informationhiding、 digital watermarking technology and its applications. Then the author analysesfundamental principles of digital watermarking algorithm in detail such as the generalframework、classification and the typical algorithm. Based on this, a blind watermarkingalgorithm based on DCT is studied. The algorithm determines embedding strengththrough characters of Human Visual System, so the result image’s quality is guaranteed.The algorithm is discussed in detail in theory , and experiment results show consistencewith theory. Then, an algorithm embedding bit series in image wavelet transformdomain is studied. The algorithm utilizes the model of Human Visual System in waveletdomain , the quality of result image is preserved. The generalized Gaussian distributionis used .The algorithm is analyzed in detail, and experiment results again show that thedistribution of image wavelet transform coefficients can be well modeled through thegeneralized Gaussian distribution. At the last, work of the thesis is summarized, and thefurther research direction is discussed.更多还原