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DWT-SVD基于小波變換的數字水印技術研究

時間:2019-05-05 21:57來源:畢業論文
綜合性介紹了數字水印的原理、研究現狀以及各方面的應用,接著以公式為輔助具體講述了DWT和DWT-SVD兩種算法中水印嵌入、提取以及檢測的過程,最后從實際上采用MATLAB平臺

摘要:隨著時代的發展,數字水印在視頻、音像的版權保護方面越來越有著巨大的應用潛力。目前,有大量的數字水印算法被提出,小波變換是其中之一。其中之一原因是圖像高頻域水印算法可以利用人眼的視覺特性(Human Visual System,HVS)提高水印的性能。在遇到各種常見攻擊時,離散小波變換算法(Discrete Wavelet Transform,DWT)又出現了一些不足,所以學者將離散小波變換和奇異值分解(Singular Value Decomposition,SVD)相結合,既保存了DWT本身的優勢,又利用SVD使算法的魯棒性提高。35213
首先本文綜合性介紹了數字水印的原理、研究現狀以及各方面的應用,接著以公式為輔助具體講述了DWT和DWT-SVD兩種算法中水印嵌入、提取以及檢測的過程,最后從實際上采用MATLAB平臺,模擬各種幾何攻擊,用圖片和表格形式展現出兩種算法的優劣。                                                          
畢業論文關鍵詞:小波變換  數字水印  DWT-SVD  DWT  魯棒性
Technology Research of Digital Watermarking Based on Wavelet Transform
Abstract:With the development of the era, digital watermarking plays more and more important roles in the copyright protection of audio and video.At present, large number of digital watermarking algorithms have been proposed,and wavelet transform is one of the important algorithms. One of the reasons is that watermarking algorithm of high-frequent-domain image can take advantage of Human Visual System (HVS) to improve the performance of the watermark. However, when meeting a variety of common attack, Discrete Wavelet Transform(DWT) algorithm has some shortage.Therefore, researchers combine Discrete Wavelet Transform and Singular Value Decomposition (SVD) .The new algorithm not only preserves DWT itself advantages,but also can use SVD to improve the robustness of the algorithm. 源¥自%六^^維*論-文+網=www.aftnzs.live
      Firstly,this paper makes a comprehensive introduction about digital watermarking,including principles,the current development status and the application of various aspects.Secondly, assisted by formula,the article introduces DWT and DWT-SVD algorithms of watermark embedding, extraction and detection proces.Lastly, in practice with the MATLAB platform, we make two algorithms suffer all kinds of geometric attacks, in the form of pictures and tables to show the advantages and disadvantages of two algorithms.
Keywords:wavelet transform  the digital watermark  DWT-SVD  DWT  robustness      
目錄
1 緒論    1
1.1研究背景    1
1.2研究現狀    1
1.3研究的理論意義    2
1. 4數字水印算法的分類    2
1.5本文的主要內容    3
2 數字水印技術的原理    4
2.1數字水印的概念    4
2.2數字水印的特點    4
2.3數字水印技術的基本原理    4
2.4數字水印技術的劃分    6
2.5數字水印技術的應用    6
3 基于離散小波變換的數字水印算法    8
3.1小波變換的發展歷史    8
3.2小波變換的定義    8
3.3離散小波變換    10
3.4基于小波變換的數字水印的基本流程    10
4基于DWT-SVD算法的數字水印算法分析    14
4.1奇異值分解    14
4.2水印的嵌入    15 DWT-SVD基于小波變換的數字水印技術研究:http://www.aftnzs.live/wuli/20190505/33064.html
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