导　　师： 万仲保

学科专业： 081203

授予学位： 硕士

作　　者： ;

机构地区： 华东交通大学

摘　　要： 随着网络技术的飞速发展,数字媒体的制作和传播变得更加方便和快捷,同时,盗版和侵权的问题也日益严重。数字水印是解决当前多媒体版权保护的一项极有潜力的技术。通用的数字水印算法包含水印嵌入和水印提取检测这两个基本方面,主要分为空间域和变换域,变换域算法具有较强的鲁棒性,其应用越来越广泛。 本文主要介绍了数字水印的研究现状和未来发展,概括性论述了数字水印的基本理论。针对数字水印的抗攻击性问题,提出了一种新的基于置乱和奇异值分解的算法。算法首先将水印和载体图像同时进行置乱加密,再将置乱后的图像进行分块,然后对每块进行量化奇异值分解,后在特征域嵌入水印。 实验结果显示,算法很好的保证了水印嵌入的不可见性,对一些图像处理方法如压缩、滤波等有很好的鲁棒性,同时对于恶意攻击,如剪切、旋转、缩放等也有很好的抗攻击性。 With the popularization of Internet and the development of multimedia technique, the digital media has become a faster and more convenient way for information communication. But at the same time, this also leads to serious problem regarding IPR protection. Digital watermark is a Potential technology which can solve the problem of multimedia copyright protection. One of the main parts of digital watermark research is about algorithm research. Usually, the watermarking algorithm contains the process of embedding and watermarking detection, including space domain and transform domain. Normally the general watermarking methods on transform domain become more and more popular, due to its good robustness, it has been more and more used. This paper introduces the current situation of the digital watermark and vision of future and generally expound the essential feature about digital watermark. Aimed at the problem of anti-attack of digital watermark, this paper puts forward a new algorithm based on image scrambling and single-value decomposition/(SVD/) of matrix. In this algorithm, the first step is to encrypt source image and watermark image by image scrambling technology. Then decompose the new source image in single-value by quantifying, and the watermark information is embedded into the diagonal matrix. The experiment shows that the algorithm is very robust to traditional image processing such as compression, filtering, and also has good immunity to intentional attack such as rotation, cutting etc.

关 键 词： 数字水印 图像置乱 奇异值分解 抗攻击

分 类 号： [TP309.7]

领　　域： [自动化与计算机技术] [自动化与计算机技术]