基于自適應(yīng)頻帶選擇的數(shù)字水印技術(shù)
A digital watermarking algorithm based on adaptive selection of frequency-band
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摘要: 如何選擇水印的隱藏區(qū)域是水印算法中的關(guān)鍵問題。該文提出了一種自適應(yīng)DCT域水印算法,利用了人眼視覺系統(tǒng)(HVS)和圖像局部特性自適應(yīng)地選擇水印隱藏區(qū)域,有效地實(shí)現(xiàn)了水印的穩(wěn)定性和不可見性的折衷。與其它水印算法比較,該文提出的自適應(yīng)算法適合于具有不同總體特性和局部特性的圖像。實(shí)驗(yàn)結(jié)果表明該算法具有很好的感知質(zhì)量,水印穩(wěn)健性好,可以抵制各種圖像處理操作諸如加性白噪聲(AWGN),JPEG壓縮以及裁剪,中值濾波,縮放等。
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關(guān)鍵詞:
- 數(shù)字水印; DCT變換; 人眼視覺系統(tǒng); 視覺掩蔽
Abstract: How to select the hidden area for watermarking is an important issue in the design of watermarking algorithm. In this paper an adaptive DCT watermarking algorithm is proposed, in which the hidden area is selected according to human visual system model and local characteristics of image. Thus robustness and imperceptibility could be well balanced. Experimental results demonstrate that this algorithm is effective, and invisible watermark is robust against many kinds of image processing such as additive white Gaussian noise, JPEG compression, cropping, median filtering and resizing. -
F. Hartung, M. Kutter, Multimedia watermarking techniques, Proc. IEEE, 1999, 87(7), 1079-1107.[2]黃繼武,Yun Q.SHI,程衛(wèi)東,DCT域圖像水印:嵌入對(duì)策和算法,電子學(xué)報(bào),2000,28(4),57-60.[3]Hsu Chiou-Ting, Wu Ja-Ling, Hiding digital watermarks in image, IEEE Trans. on Image Processing, 1999, 8(1), 58-68.[4]C.I. Podilchuk, Zeng Wenjun, Image-adaptive watermarking using visual models, IEEE J. on Selected Areas in Communications, 1998, 16(4), 525-539.[5]Lin Shinfeng D., Chen Chin-feng, A robust DCT-based watermarking for copyright protection,IEEE Trans. on Consumer Electronics, 2000, 46(3), 415-421.[6]I.J. Cox, J. Kilian, F. T. Leighton, T. Shamoon, Secure spread spectrum watermarking for multimedia, IEEE Trans. on Image Processing, 1997, 6(12), 1674-1687.[7]M.D. Swanson, Zhu Bin, A. H. Tewfik, Multiresolution scene-based video watermarking using perceptual models, IEEE J. on Selected Areas in Communications, 1998, 16(4), 540-550. -
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