基于小波变换的数字水印嵌入式算法研究毕业论文设计说明书.docVIP

目　　录 摘要 Ⅰ Abstract Ⅱ 第一章　绪论 1 1.1　数字水印的背景和研究意义 1 1.2　数字水印的研究方向和现状 2 1.3　本文的主要工作 3 第二章　数字水印技术研究 4 2.1　数字水印的研究背景 4 2.2　数字水印的分类 4 2.3 数字水印的特性 5 2.4　数字水印的检测与技术 7 2.5　数字水印典型算法 7 2.5.1　时空域水印算法 7 2.5.2　变换域水印算法 8 2.5.3　压缩域水印算法 8 2.6　数字水印的攻击技术 9 第三章　DWT数字水印算法与变换 10 3.1　离散小波变换原理 10 3.2　二维离散小波快速算法 11 3.3　离散图像的二维正交小波分析 11 3.4　水印的嵌入和提取 14 3.5　仿真实验 14 3.5.1　嵌入和提取水印 14 3.5.2　压缩攻击（JEPG） 15 3.5.3　噪声攻击（高斯） 16 3.6　实验结果分析 16 第四章　总结与展望 17 4.1　本文总结 17 4.2　展望 17 参考文献(References) 18 致谢 19 附录 20 he digital water marking embedded algorithm research based on the wavelet transform Abstract：With the rapid development of information technology, especially the growing of Internet, the spread of digital media is very swift, and the getting of digital information is more convenient and quicker. At the same time, the question of digital media copyright protection and authentication is becoming more and more important, thus digital multimedia copyright and security have become one of hotspot questions. Digital image watermarking is a kind of new technology for copyright protection, and is also one of effective methods to protect digital multimedia. In fact this technique utilizes image process methods to hide some information. The key of digital watermark to copyright protection is the imperceptibility and robustness for 　embedded information. This article first cryptographic techniques, hidden information technology were reviewed, and then introduced a number of specific watermark of related concepts, applications, development of the basic characteristics and the typical algorithm, and on the wavelet transform the concept of wavelet transform and the principles and methods; Finally on the wavelet transform the digital watermark in the field of application and a detailed description of a spread spectrum-based DWT domain watermarking algorithm. Images will be divided into four sub-block through the one discrete wavelet transform，When the embedded watermark, using the pseudo-random sequence spread spe