基于小波變換的數(shù)字水印及版權(quán)保護(hù)
WAVELET-BASED DIGITAL WATERMARKS AND COPYRIGHT PROTECTION
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摘要: 數(shù)字水印技術(shù)是近年來關(guān)于版權(quán)保護(hù)方面研究的一個新課題,通常的水印是指嵌入在圖像中的隱蔽的信息,作為數(shù)字圖像的標(biāo)簽。通過復(fù)雜的水印嵌入方法可以防止非授權(quán)拷貝或?qū)D像的其它攻擊性操作。本文提出了基于塊的小波變換下水印的嵌入和提取方法,使每一個水印像素隱藏在相應(yīng)的圖像塊的中低頻小波系數(shù)之中。利用本文的水印技術(shù)可以較好地解決版權(quán)爭議等問題。理論分析和實(shí)驗(yàn)結(jié)果均證明了本文提出的方法是有效的和可行的。
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關(guān)鍵詞:
- 數(shù)字水印; 版權(quán)保護(hù); 小波變換; 偽隨機(jī)化
Abstract: Digital watermarking is a new research topic about copyright protection in recent years. Watermarking is a technique for labeling digital picture by hidding secret information in the images. Sophisticated watermark embedding is a potential method to discourage unauthorized copying or attacking the images. This paper presents a technique of watermark embedding and extracting based on discrete wavelet transform of blocks in the image. Each pixel of a watermark is embedded in the wavelet coefficient of the middle and low frequency of a block in the images. Disputation about copyright can be settled down by using the watermark embedding technique presented in this paper. Both theoretical analysis and experimental results show that this technique is reasonable and satisfactory. -
C.T. Hsu, J. L. Wu, Multiresolution watermarking for digital images, IEEE Trans. on Circuitsand Systems II, 1998, CAS-II-45(8), 1097-1101.[2]C.T. Hsu, J. L. Wu, Hidden digital watermarks in images, IEEE Trans. on Image Processing,1999, IP-8(1), 58-68.[3]I.J. Cox, J. Kilian, F. T. Leighton, T. Shamoon, Secure spread spectrum watermarking formultimedia, IEEE Trans. on Image Processing, 1997, IP-6(12), 1673-1686.[4]K.K. Wong, Adaptive watermarking, IEEE Trans. on Consumer Electronics, 1997, CE-43(4),1003-1009.[5]韋志強(qiáng),秦鵬,歐陽宏彬,基于小波域中視覺門限模型的數(shù)字水印技術(shù),東南大學(xué)學(xué)報(bào),1998,28(1),44-48[6]胡俊,劉振華,舒暢,單向數(shù)字水印,密碼與信息,1998,(2),42 49.[7]劉貴忠,邸雙亮,小波分析及其應(yīng)用,西安,西安電子科技大學(xué)出版社,1992,17-36[8]朱近康,擴(kuò)展頻譜通信及其應(yīng)用,合肥,中國科學(xué)技術(shù)大學(xué)出版社,1993,105-181.[9]J.M. Shapiro, Embedded image coding using zerotrees of wavelet coefficients, IEEE Trans. onSignal Processing, 1993, SP-41(12), 3445-3462. -
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