臺灣博碩士論文加值系統

本論文在發展出一套可回復性的脆弱性浮水印，使數位影像也能成為未來在舉證方面的重要證物。由於近年來數位影像的使用日益廣泛，隨著技術的進步，於是許多數位影像被有心人士惡意修改並加以散播，造成當事人名譽上的損害。其實，如果能將數位影像加入一套公証系統，日後若有人用此數位影像加以修改，以期惡意抺黑或誣陷他人，我們就可以利用這套公証系統對這些影像加以確認其真偽。
我們利用JPEG-2000在DWT(Discrete Wavelet Transform)之後的係數將其轉成二元碼，並將低頻的係數與高頻的係數做代換，同時調整相對位置，以避免被攻擊時，在相對位置所藏入的資訊被修改。當驗証時，即將高頻藏入的係數與低頻的係數做比對，當兩者係數不同時，便得知影像被修改。最後再將藏入的資訊與被修改的區域做代換，即可將部分的影像還原。希冀，此研究成果能使數位影像的應用更為廣泛，不僅能將提升數位影像的公證性，同時也可將被修改的數位影像還原部分資訊，以作為證據的參考。

目錄_____________________________________________________1
摘要_____________________________________________________2
第一章 簡介_____________________________________________3
　1.1背景介紹____________________________________________3
1.2章節概述____________________________________________4
第二章 數位影像浮水印於JPEG2000之應用_________________ 5
　2.1 JPEG2000概述_______________________________________6
　2.2 JPEG2000與JPEG之比較分析_________________________ 7
　2.3離散小波轉換(DWT)概述_____________________________ 11
　2.4數位影像浮水印之技術介紹___________________________ 16
第三章 數位影像浮水印的加入與分析______________________ 20
　3.1加入浮水印的原理架構及說明_________________________ 20
　3.2加入及偵測浮水印的方法_____________________________ 21
　3.3偵測及回復被修改區域的方法_________________________ 24
第四章 論文方法探討____________________________________ 26
　4.1加入浮水印後的影像品質比較_________________________ 26
　4.2浮水印的偵測及回復結果_____________________________ 29
第五章 結論與未來展望__________________________________ 33
　5.1結論_______________________________________________ 33
　5.2未來展望___________________________________________ 34
　參考文獻______________________________________________ 35
程式碼__________________________________________________ 37

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