1、 混沌数字水印混沌数字水印技术技术的原理与发展现状的原理与发展现状 姓姓 名名 院院 系系 物理与信息工程学院 专专 业业 电子信息工程 班班 级级 学学 号号 指导教师指导教师 答辩日期答辩日期 成成 绩绩 I 混沌数字水印技术的原理与发展现状 内容摘要内容摘要 近年来,计算机网络以及通信技术飞速发展,网上交流的多媒体信息已经达到了从 未有过的的广度和深度。数字图像是非常多见的多媒体信息,比声音、文字等包含着更 加直观立体且丰富多样的信息量,因此获得了越来越普遍的应用。然而,具有容易被复 制、易被篡改等特点,经常易受到抄袭、修改或破坏等各种手段的攻击。因此,找到一 种保护数字多媒体作品的方法
2、迫在眉睫,于是数字水印技术应运而生。数字水印的本质 是信息隐藏技术,它主要用来保护数字媒体等的版权所有、证明作品是否是真实并且可 靠的、监视追踪盗版窃取的行为。 论文首先介绍了数字水印的定义、分类以及它的一些主要特征,随后主要阐述了本 文所使用的数字水印的实现方法,为数字水印算法的解释、实现及结果分析提供了理论 依据。作为数字水印算法的重要组成部分,论文介绍了 DCT 变换以及 m 序列的产生及水 印实现步骤,最后通过 matlab 程序仿真对嵌入水印的图像质量以及水印相似度做了结 果分析。 【关键词】数字水印 离散余弦变换(DCT) m 序列 水印的攻击、检测 II The principl
3、e and current state of the chaotic digital watermarking technology Abstract In recent years, the rapid development of computer network and communication technology, multimedia information exchange has reached unprecedented breadth and depth. Digital image is a very common multimedia information, Sou
4、nd, text and other than contains the amount of information and more visual variety, It has been used more and more widely. However,the character of easy to be copied and tampered is the weakness of digital images. Therefore, it is imminent to find a way of protecting the digitai multimedia works.In
5、hence,the technology of digital watermarking emerges as the times require. Digital watermarking is information hiding, it is used to protect the digitai multimedia works copyright , testify works is true and reliable or not and supervise the behavior of Piracy. This paper firstly introduces the defi
6、nition classification and characteristics of digital watermarking,subsequently, I mainly elaborated Implementation method of digital watermarking,to provide a theoretical basis for the explanation,realization and results analysis explanation of the digital watermarking algorithm. As an important part of digital watermarking algorithm,this paper introduces DCT ,m sequence and the watermark implementation steps. Finally, analysising of the results of the embedde