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基于matlab的数字图像水印技术研究,基于matlab的数字图像水印技术研究2.3万字我自己的毕业论文，原创的，已经通过校内系统检测，仅在本站独家出售，重复率低，大家放心下载使用摘要: 随着信息技术和网络技术的飞速发展，数字多媒体信息的存储、复制和传播变得十分方便，但同时也引发盗版、版权纠纷和信息是否安全等问题。因此如何保护作品的版权已经受到人们的广泛重视...
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基于MATLAB的数字图像水印技术研究
2.3万字
我自己的毕业论文，原创的，已经通过校内系统检测，仅在本站独家出售，重复率低，大家放心下载使用
摘要: 随着信息技术和网络技术的飞速发展，数字多媒体信息的存储、复制和传播变得十分方便，但同时也引发盗版、版权纠纷和信息是否安全等问题。因此如何保护作品的版权已经受到人们的广泛重视。为了解决这个问题，数字水印技术应运而生。版权所有人只需凭借数字水印，就可维护其利益和所有权声明。
本文主要研究基于MATLAB的数字水印技术。详细阐述了数字水印的相关概念和离散小波变换（Discrete Wavelet Transform，DWT）的原理。该算法在整个频域中选择满足在同尺度和同方位下绝对值大于相应的恰可察觉误差的小波系数作为嵌入点，对嵌入点的小波系数用对应与该点的恰可察觉误差进行量化，对量化后的系数进行修改来实现水印嵌入；图像认证检测时，若提取的水印信息与原始水印信息有差，则认为图像已被篡改。该算法的篡改定位能力很好，但抗压缩能力差，而且不是盲水印。
在MATLAB7.0环境下进行了仿真实验，把有意义的二值图像作为水印信号进行嵌入与提取。实验结果表明，在实验中所采用的算法，能够满足数字图像水印技术的不可见性和鲁棒性的要求，并且具有一定的实用性。
关键词：数字水印技术 离散小波变换 MATLAB
Research on digital image watermarking technique based on MATLAB
Abstract: With the rapid development of information technology and network technology, digital multimedia information storage, reproduction and transmission have become very convenient, but also whether piracy, copyright disputes and information security and other issues. So the copyright protection of multimedia content and content identification has become a problem to be solved. In order to solve this problem, digital watermarking technology arises at the historic moment. Copyright owners simply relying on digital watermarking, can maintain its interests and ownership declaration.
This paper mainly studies the digital watermarking technology based on MATLAB. This paper expounds the related concepts of digital watermarking in detail and the principle of the discrete wavelet transform (DWT). The algorithm in the frequency domain chosen meet on the same scale and tongfang an absolute value is greater than the corresponding just noticeable difference as embedded wavelet coefficients, the embedding of wavelet coefficients using the quantitative just noticeable difference that corresponds to that point, after the quantitative coefficients are modified for watermark embedding; Image authentication test, if the extracted watermark and the original watermark information there, is that the image has been tampered with. Tamper with the ability of the algorithm is very good, but the compression resistance is poor, and not blind watermarking.
Under the environment of MATLAB7.0 simulation experiment, the meaningful binary image as watermark signal is embedded and extracted. The experimental results show that the algorithm adopted in the experiment, can satisfy the digital image watermark technology of invisibility and robustness requirements, and has a certain practicality.
Key words： Digital watermarking technology The discrete wavelet transform MATLAB
目 录
第一章 绪论 1
1.1数字水印技术的研究背景及意义 1
1.2国内外研究现状 2
1.3数字水印技术的应用领域 4
1.4本文主要工作 6
第二章 数字水印的基本理论 7
2.1数字水印系统的基本框架 7
2.2数字水印的分类 8
2.3数字水印技术的特性 10
2.4数字水印的攻击方式 12
2.5数字水印技术的性能评价 14
2.6 本章小结 16
第三章 小波变换理论 17
3.1小波变换分析及其发展 17
3.2小波变换 17
3.3 连续小波变换 18
3.4 离散小波变换 18
3.5二维小波变换 19
3.6多分辨率分析 20
3.7小波变换的特性分析 21
3.8本章小结 22
第四章 基于小波变换的数字水印技术及其仿真实验 23
4.1基于小波变换的数字水印技术 23
4.1.1水印信息的嵌入 23
4.1.2水印信息的提取 24
4.2 MATLAB7.0简介 25
4.3实验仿真结果 26
4.3.1数字水印的嵌入与提取 26
4.3.2嵌入水印图像与原图的比较 27
4.3.3抗噪声攻击 28
4.3.4抗剪切攻击 29
4.3.5抗旋转攻击 30
4.4 本章小结 30
第五章 总结与展望 31
5.1总结 31
5.2展望 31
致谢 33
参考文献 34
2.3万字
我自己的毕业论文，原创的，已经通过校内系统检测，仅在本站独家出售，重复率低，大家放心下载使用
摘要: 随着信息技术和网络技术的飞速发展，数字多媒体信息的存储、复制和传播变得十分方便，但同时也引发盗版、版权纠纷和信息是否安全等问题。因此如何保护作品的版权已经受到人们的广泛重视。为了解决这个问题，数字水印技术应运而生。版权所有人只需凭借数字水印，就可维护其利益和所有权声明。
本文主要研究基于MATLAB的数字水印技术。详细阐述了数字水印的相关概念和离散小波变换（Discrete Wavelet Transform，DWT）的原理。该算法在整个频域中选择满足在同尺度和同方位下绝对值大于相应的恰可察觉误差的小波系数作为嵌入点，对嵌入点的小波系数用对应与该点的恰可察觉误差进行量化，对量化后的系数进行修改来实现水印嵌入；图像认证检测时，若提取的水印信息与原始水印信息有差，则认为图像已被篡改。该算法的篡改定位能力很好，但抗压缩能力差，而且不是盲水印。
在MATLAB7.0环境下进行了仿真实验，把有意义的二值图像作为水印信号进行嵌入与提取。实验结果表明，在实验中所采用的算法，能够满足数字图像水印技术的不可见性和鲁棒性的要求，并且具有一定的实用性。
关键词：数字水印技术 离散小波变换 MATLAB
Research on digital image watermarking technique based on MATLAB
Abstract: With the rapid development of information technology and network technology, digital multimedia information storage, reproduction and transmission have become very convenient, but also whether piracy, copyright disputes and information security and other issues. So the copyright protection of multimedia content and content identification has become a problem to be solved. In order to solve this problem, digital watermarking technology arises at the historic moment. Copyright owners simply relying on digital watermarking, can maintain its interests and ownership declaration.
This paper mainly studies the digital watermarking technology based on MATLAB. This paper expounds the related concepts of digital watermarking in detail and the principle of the discrete wavelet transform (DWT). The algorithm in the frequency domain chosen meet on the same scale and tongfang an absolute value is greater than the corresponding just noticeable difference as embedded wavelet coefficients, the embedding of wavelet coefficients using the quantitative just noticeable difference that corresponds to that point, after the quantitative coefficients are modified for watermark embedding; Image authentication test, if the extracted watermark and the original watermark information there, is that the image has been tampered with. Tamper with the ability of the algorithm is very good, but the compression resistance is poor, and not blind watermarking.
Under the environment of MATLAB7.0 simulation experiment, the meaningful binary image as watermark signal is embedded and extracted. The experimental results show that the algorithm adopted in the experiment, can satisfy the digital image watermark technology of invisibility and robustness requirements, and has a certain practicality.
Key words： Digital watermarking technology The discrete wavelet transform MATLAB
目 录
第一章 绪论 1
1.1数字水印技术的研究背景及意义 1
1.2国内外研究现状 2
1.3数字水印技术的应用领域 4
1.4本文主要工作 6
第二章 数字水印的基本理论 7
2.1数字水印系统的基本框架 7
2.2数字水印的分类 8
2.3数字水印技术的特性 10
2.4数字水印的攻击方式 12
2.5数字水印技术的性能评价 14
2.6 本章小结 16
第三章 小波变换理论 17
3.1小波变换分析及其发展 17
3.2小波变换 17
3.3 连续小波变换 18
3.4 离散小波变换 18
3.5二维小波变换 19
3.6多分辨率分析 20
3.7小波变换的特性分析 21
3.8本章小结 22
第四章 基于小波变换的数字水印技术及其仿真实验 23
4.1基于小波变换的数字水印技术 23
4.1.1水印信息的嵌入 23
4.1.2水印信息的提取 24
4.2 MATLAB7.0简介 25
4.3实验仿真结果 26
4.3.1数字水印的嵌入与提取 26
4.3.2嵌入水印图像与原图的比较 27
4.3.3抗噪声攻击 28
4.3.4抗剪切攻击 29
4.3.5抗旋转攻击 30
4.4 本章小结 30
第五章 总结与展望 31
5.1总结 31
5.2展望 31
致谢 33
参考文献 34
