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研究生:陳延承
研究生(外文):Yen-Chen Chen
論文名稱:可調式群組像素差值直方圖位移之可逆資訊隱藏研究
論文名稱(外文):The Study of Reversible Data Hiding Based on Histogram Shifting and Adaptive Group Pixel Differencing
指導教授:黃炳森黃炳森引用關係
指導教授(外文):Ping-Sheng Huang
學位類別:碩士
校院名稱:銘傳大學
系所名稱:電子工程學系碩士班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2015
畢業學年度:103
語文別:中文
論文頁數:50
中文關鍵詞:資訊隱藏藏密學可逆式不可逆式
外文關鍵詞:Non-reversibleReversibleSteganographyData hiding
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目前已經有許多的資訊隱藏的方法,在資訊隱藏中藏密學的空間域可簡單分為可逆資訊隱藏以及不可逆資訊隱藏。在可逆與不可逆的比較中,不可逆資訊隱藏容量通常較可逆資訊隱藏容量多,但是卻將影像造成了部分破壞,而可逆資訊隱藏在資訊萃取資後,仍然可以復原影像,相對的在許多的應用中可逆資訊隱藏不僅僅可以資訊隱藏也可以保護影像。
本論文提供了一個高容量的可逆資訊隱藏演算法,以直方圖位移法為基礎,不僅僅結合了相鄰像素差值的特性,使得直方圖更加集中峰點更多之外,還配合了n×n群組像素讓本論文的方法有了更多樣性,使用了雙峰點增加了資訊隱藏的容量,最後提出了雙位元資訊隱藏方法,讓直方圖位移法不用再限制於峰點,資訊隱藏容量可以突破峰點的大小。
在雙峰點的資訊隱藏容量下,平均達到了0.2bpp,而平均PSNR值也有45dB,接著雙峰點配合雙位元資訊隱藏的平均容量更是高達了0.3bpp,平均PSNR值也有維持在40dB。
There are already a lot of data hiding methods. Steganography of data hiding in spatial domain can be divided into reversible and non-reversible approaches. The capacity of non-reversible data hiding methods is usually more than that of the reversible techniques. However, image information are normally sacrificed at the same time. On the other hand, reversible data hiding approaches can recover the stego-image to the original image after data extraction.
This thesis presents a high-capacity reversible data hiding algorithm, based on histogram shifting and adaptive group pixel differencing. The algorithm can not only use the information of adjacent pixel difference values, the histogram peak points can also be made more concentrated. Furthermore, the property of n×n group pixels and double peak points are adopted to increase the capacity of data hiding. Finally, the method of double-bit data hiding is proposed and the histogram shifting is not limited only at the peak point.
Using the method of double peak points in data hiding, the capacity can reach to an average of 0.2 bpp (bit per pixel) and an average PSNR value of 45dB can be accomplished. Furthermore, by combining the method of double peak points and double-bit data hiding, the capacity can be enhanced to an average of 0.3 bpp and an average PSNR value of 40dB can be maintained.
致謝 ii
中文摘要 iii
Abstract iv
目錄 v
圖目錄 vii
表目錄 ix
第一章 緒論 1
1.1前言 1
1.2研究背景 2
1.3論文架構 3
第二章 文獻探討 4
2.1可逆資訊隱藏法 4
2.2預測編碼法 5
2.3交錯預測法 7
2.4階層式預測法 10
2.5相鄰像素差值法 11
第三章 研究方法 13
3.1方法特性 13
3.2資訊隱藏 13
3.2.1步驟一 14
3.2.2步驟二 15
3.2.3像素值回復 16
3.3資訊萃取 16
3.3.1步驟一 16
3.3.2步驟二 17
3.3.3像素值回復 17
3.4雙位元資訊隱藏 18
3.5隱藏、萃取範例 19
第四章 實驗結果 27
4.1影像品質 27
4.2實驗結果 28
4.2.1實驗一 28
4.2.2實驗二 32
4.3實驗分析 36
第五章 結論 38
參考文獻 39
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