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研究生: 余泰廣
Yu, Tai-Kuang
論文名稱: 綠雜訊半色調技術於浮水印之研究
Watermarking by green noise halftoning technique
指導教授: 王希俊
Wang, Hsi-Chun
學位類別: 碩士
Master
系所名稱: 圖文傳播學系
Department of Graphic Arts and Communications
論文出版年: 2016
畢業學年度: 104
語文別: 中文
論文頁數: 71
中文關鍵詞: 數位半色調數位浮水印綠雜訊半色調
英文關鍵詞: Digital Halftoning, Digital Watermark, Green Noise Halftoning
DOI URL: https://doi.org/10.6345/NTNU202203818
論文種類: 學術論文
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  • 資訊科技的蓬勃發展,文件資料複印也日趨便利快速且精密,但也造成文件資料的偽造情況層出不窮;⼤量⽂件遭⾮法複製導致著作權與智慧財產權受到侵犯,因⽽顯現出印刷防偽技術對智慧財產保護之重要性。⽬前半⾊調影像加密技術中,以FM (Frequency Modulation)網點及AM (Amplitude Modulation)網點為主軸,但FM網點的網點擴張(Dot gain)問題較⼤⽽AM網點細部的表現較差;因此有學者提出綠雜訊半⾊調技術,改善FM及AM網點缺點,降低網點擴張情形及保留邊緣細緻度;由過去研究中發現⽬前綠雜訊技術多以製作半⾊調影像為主,未發現利⽤綠雜訊半⾊調技術藏⼊實體浮⽔印之研究。因此本研究之⽬的以綠雜訊半⾊調演算法為基礎,⽅法為改變演算法中種⼦形成⽅式利⽤不同網點尺⼨製作浮⽔印及底紋,並以HVS (Human visual system)評估其隱藏效果,尋找出最佳浮 ⽔印濃度及尺⼨,製作防偽⽂件,使⽂件經複印後⽴即顯現隱藏之浮水印。結果顯⽰,此綠雜訊半⾊調技術所製作之防偽⽂件,經由複印機複印及⼿機拍照將影像上傳⾄電腦進⾏程式解密後,能有效地顯現所隱藏之浮⽔印,達到防偽效果,保護⽂件之版權。

    Owning to the vigorous development of information technology, file and documents duplicating is becoming more convenient and precise. However, it has also caused endless cases of falsification; massive data has been illegally duplicated which has seriously infringed one’s intellectual property rights. All the facts above reveal the importance of anti-counterfeiting for intellectual property protection. The current halftone image encryption technology to FM (Frequency Modulation) dots and AM (Amplitude Modulation) dots are viewed as the protagonists, but FM dots resulting in greater Dot gain problem and its performance on details of the AM dots is inferior; therefore some scholars have issued green noise halftone techniques which can reduce Dot gain and remain the high resolution on the edges. Discussion from the reference found that the current green noise technology for the production of halftone image on based, Unused green noise halftone encryption produced a watermark. Therefore, the purpose of this study is to change the way the formation of seed algorithm with different sized dots watermark and shading by using the green noise halftone algorithm as the base. And to assess its encryption effect by HVS, in order to find out the best concentration and dimension of watermark to produce security documents, which reveal the hidden watermark after duplicating. The results showed that the documents with this green noise halftone encryption technology can effectively reveal the hidden watermark and to use mobile phone take a picture to upload image to computer for the decryption program, which achieve the effect of security and protect the copyright.

    摘要 I ABSTRACT II 表次 IV 圖次 V 第一章 緒論 1 第一節 研究背景與動機 1 第二節 研究目的 2 第三節 研究問題 2 第四節 研究範圍與限制 3 第五節 研究流程圖 4 第六節 名詞解釋 5 第二章 文獻探討 6 第一節 數位半色調技術 6 第二節 數位浮水印資訊隱藏技術 18 第三節 綠雜訊半色調及相關研究 31 第四節 文獻小結 43 第三章 研究方法與設計 44 第一節 研究架構 44 第二節 研究設備與工具 45 第三節 利用不同綠雜訊網點尺寸製作浮水印及底紋 46 第四章 實驗結果與討論 55 第一節 綠雜訊半色調浮水印實驗結果 55 第二節 透過HVS模擬綠雜訊半色調浮水印的隱藏效果 58 第三節 最佳綠雜訊半色調浮水印效果評估 63 第四節 綠雜訊半色調浮水印防偽文件加值應用 65 第五章 結論與建議 67 第一節 研究結論 67 第二節 研究建議 68 參考文獻 69

    中文文獻

    林珈帆 (民93)。利用綠雜訊遮罩半色調影像進行資料嵌入之研究。世新大學平面傳播科技學系學位論文,台北市。

    林煜翔( 民96)。網點偏移技術與全像科技整合系統應用之研究。中華印刷科技年報,3,87-199。

    張維烝 (民100)。改變文件複印後內容之混合網點數位浮水印研究。國立臺灣師範大學圖文傳播學系學位論文,台北市。

    鄭雅文 (民102)。改進式混合網點應用於數位浮水印之研究。國立臺灣師範大學圖文傳播學系學位論文,台北市。

    蕭人豪、林欣慧、林金龍、林麗虹 (民93)。數位浮水印技術發展現況:以數位典藏計畫為例。台北:第三屆數位典藏技術研討會,175-185。

    蕭佩琪、王希俊、連啟明 (民93)。文件底紋之混合網點數位浮水印技術。台北:第三屆數位典藏技術研討會,223-230。

    英文文獻

    Alasia, A.V. (1976). U. S. Patent No. 3937565. Process of coding indicia and product produced thereby. Whitestone, NY: U.S. Patent and Trademark Office.

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    Lau, D.L., Ulichney, R., & Arce, G.R.(2003). Blue- and green-noise halftioning models. IEEE Signal Processing Magazine, 20(4), 28-38.

    Floyd, R. W., & Steinberg, L. (1976). An adaptive algorithm for spatial grayscale. Proceeding of Society for Information Display, 17(2), 75-77.

    Fu, M. S., & Au, O. C. (2002). Data hiding watermarking for halftone images. IEEE Trans. Image Process, 11(4), 477-484.

    Fung, Y. H., & Chan, Y. H. (2009). Multiscale error diffusion algorithm for green noise digital halftoning. 17th Signal Processing Conference, 2258-2262.

    Fung, Y. H., & Chan, Y. H. (2014). Green noise video halftoning. Proceeding of the 19th International Signal Processing, 83-93.

    Gruhl, D.,& Bender. W., (1999). Information hiding to foil the casual
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    Hecht, D.L. (2001). Printed embedded data graphical user interfaces. IEEE Computer, 34(3), 47-55.

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    Philips, G.K. (2002). Combining nanocharacter printing, digital watermarking and uv coded taggents for optimal machine-readable security, SPIE proceeding,Conference on Optical Security and Counterfeit Deterrence Techniques V,4677,150-158.

    Sharma, G., & Wang, S. G. (2004). U.S. Patent No. 7,286,682. Show-through watermarking of duplex printed documents Washington, DC: U.S. Patent and Trademark Office.


    Ulichney, R. A. (1987). Digital Halftoning, Cambridge, MA: MIT Press.

    van Renesse, R.L. (2005). Optical Document Security. (3rd ed.). London: Artech House. 157.


    Wang, H.C., Hsiao, P. C., & Lien, C. M. (2009). U.S. Patent 7,554,699. Method of watermark with hybrid halftone dots. Washington, DC: U.S. Patent and Trademark Office.

    Wang, H.C., & Cheng, Y. W. (2015). U.S. Patent 9,124,819. Watermark and Manufacturing method therefor. Washington, DC: U.S. Patent and
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    網路資料

    狗影追追追 (2011),極地長征-哈士奇,取自:
    http://ahhastudio.pixnet.net/blog/post/9623173

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