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研究生:陶啟川
研究生(外文):Chi-Chuan Tao
論文名稱:可調式變動長度數位影像浮水印
論文名稱(外文):Blind Adaptive Shift Length Watermarking For Digital Images
指導教授:黃育仁黃育仁引用關係
指導教授(外文):Yu-Len Huang
學位類別:碩士
校院名稱:東海大學
系所名稱:資訊工程與科學系
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:2005
畢業學年度:93
語文別:英文
論文頁數:36
中文關鍵詞:數位浮水印多媒體離散餘弦轉換頻率域資訊隱藏
外文關鍵詞:watermarkmultimediadiscrete cosine transformDCTfrequency domaininformation hiding
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最近的幾年由於網路的發達以及數位多媒體資訊的普及,數位浮水印技術已經是主要用來保障數位資訊版權的主要方法,本論文提出了一種不需原始影像(blind)數位浮水印(watermark)技術,先將原始影像經過離散餘弦轉換(discrete cosine transform; DCT)至頻率域,再將片段的浮水印資訊嵌入DCT的係數中,並計算與原本係數的差異,以決定是否要調整嵌入浮水印資訊的DCT係數,此方式能夠提供與過去研究之數位浮水印技術相同的強韌度,卻能提供較佳的影像品質以及能嵌入更多的資訊,.還原的過程中僅需提供兩筆資料即可還原影像,不需要使用原始影像。同時,又因為是以位元角度將資訊嵌入到係數中,因此當影像經過失真式壓縮法壓縮之後,影像的檔案大小也不會有劇烈的改變。
In recent years, as a result of the development of the network and popularization of the multimedia information, watermark technology has been utilized for ensuring the copyright mainly method of digital information. This thesis proposed a new blind watermarking algorithm based on discrete cosine transform (DCT) for digital images. In the proposed method, the difference of DCT coefficients between the original information and watermarked information was calculated and used to determine the adjustment of watermarked DCT coefficients. The results show that the proposed watermark algorithm no only provides similar robust as previous watermarking investigations, but also improves the image quality of watermarked image and the information quantity of hiding ability. Moreover, the original image is unnecessary for acquiring the watermark. In the reconstruction procedure, only two bytes side information is required for digital image codec. The file size of watermarked JPEG compressed image approximates one without watermarking.
TABLE OF CONTENTS
TABLE OF CONTENTS 1
LIST OF FIGURES 2
LIST OF TABLES 3
摘要 4
CHAPTER 1 INTRODUCTION 6
CHAPTER 2 REVIEWS OF DCT-BASED WATERMARKING 9
CHAPTER 3 IMPROVED WATERMARKING ALGORITHM 13
CHAPTER 4 EXPERIMENT RESULTS 19
CHAPTER 5 CONCLUSION 32
REFERENCES 34
REFERENCES
[1]R. Schyndel, A. Tirkel, and C. Osborne, “A Digital Watermark,” in IEEE Proc. Int. Conf. Image Processing, 1994, vol. 2, pp. 86–90.
[2]G. Caronni, “Assuring Ownership Rights For Digital Images,” in Proc. Reliable IT Systems, VIS’95, 1995, pp. 251–263.
[3]W. Bender, D. Gruhl, and N. Morimoto, “Techniques For Data Hiding,” MIT Media Lab Tech. Rep., vol. 35, no. 3&4, pp. 313–336, 1996.
[4]K. Matsui and K. Tanaka, “Video-Steganography,” in IMA Intellectual Property Project Proc., Jan. 1994, pp. 186–206
[5]F. Goffin, J. F. Delaigle, C. De Vleeschouwer, B. Macq, and J. J. Quisquater, “A Low Cost Perceptive Digital Picture Watermarking Method” in Proc. SPIE Electronic Imaging ’97: Storage and Retrieval of Image and Video Databases V, Feb. 1997, vol. 3022, pp. 264–277.
[6]I. Pitas, “A Method For Signature Casting On Digital Images,” in IEEE Proc. Int. Conf. Image Processing, 1996, vol. 3, pp. 215–218.
[7]G. C. Langelaar, J. C. A. van der Lubbe, and R. L. Lagendijk, “Robust Labeling Methods For Copy Protection Of Images,” in Proc. SPIE Electronic Imaging ’97: Storage and Retrieval of Image and Video Databases V, Feb. 1997, vol. 3022, pp. 298–309.
[8]R. B. Wolfgang and E. J. Delp, “A Watermark For Digital Images,” in IEEE Proc. Int. Conf. Image Processing, 1996, vol. 3, pp. 219–222.
[9]I. Cox, J. Kilian, F. T. Leighton, and T. Shamoon, “Secure Spread Spectrum Watermarking For Multimedia,” IEEE Trans. Image Processing, vol. 6, pp. 1673–1687, Dec. 1997.
[10]M. D. Swanson, M. Kobayshi, and A. H. Tewfik, “Multimedia Data-embedding And Watermarking Technologies,” Proc. IEEE, vol. 86, pp. 1064–1087, Jun. 1998.
[11]C. Busch, W. Funk, and S. Wolthusen, “Digital Watermarking: From Concepts To Real-Time Video Applications,” IEEE Comput. Graphics Applicat., vol. 19, pp. 25–35, Jan. 1999.
[12]F. Hartung and M. Kutter, “Multimedia Watermarking Techniques,” Proc. IEEE, vol. 87, pp. 1079–1106, Jul. 1999.
[13]W. C. Chu, “DCT-Based Image Watermarking Using Subsampling,” IEEE Trans. Multimedia, vol. 5, no. 1, pp. 34–38, Mar. 2003.
[14]M. A. Suhail and M. S. Obaidat, “Digital Watermarking-Based DCT and JPEG Model,” IEEE Trans. Instrumentation and Measurement, vol. 52, no. 5, pp. 1640–1647, Oct. 2003.
[15]S. H. Wang and Y. P. Lin, “Wavelet Tree Quantization for Copyright Protection Watermarking,” IEEE Trans. Image Processing, vol. 13, no. 2, pp. 154–165, Feb. 2004.
[16]Frank Y. Shih and Yi-Ta Wu, “A Novel Fragile Watermarking Technique,” IEEE Inter. Conf. on Multimedia. And Expo, Taiwan, Jun. 2004, pp. 875-878.
[17]ISO/IEC 10918-1 /ITU-T Recommendation T.81, "Digital compression and coding of continuous-tone still images," 1992.
[18]ITU-T Recommendation H.261, "Video CODEC for audiovisual services at px64kbit/s," 1993.
[19]ITU-T Recommendation H.263, "Video coding for low bit rate communication," Version 2, 1998.
[20]ISO/IEC 11172-2, "Information technology-coding of moving pictures and associated audio for digital storage media at up to about 1.5 Mbit/s-part 2: Video," 1993.
[21]ISO/IEC 13818-2, "Information technology: generic coding of moving pictures and associated audio information: Video," 1995.
[22]ISO/IEC 14996-2, "Information technology-coding of audio-visual objects-part 2: Visual," 1998.
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