圖像高逼真度的自適應(yīng)盲水印算法
A Blind adaptive watermarking algorithm for hich fidelity of image
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摘要: 隨著計(jì)算機(jī)和網(wǎng)絡(luò)技術(shù)的飛速發(fā)展,數(shù)字圖像、音頻和視頻產(chǎn)品越來(lái)越需要一種有效的版權(quán)保護(hù)方法,所謂數(shù)字水印就是一種嵌入到圖像、視頻或音頻數(shù)據(jù)中的不可見(jiàn)標(biāo)志,可以用于多媒體數(shù)據(jù)的版權(quán)保護(hù)、認(rèn)證和標(biāo)注等。該文提出了一個(gè)有效的自適應(yīng)育水印算法,在水印檢測(cè)過(guò)程中不需要原始圖像。原始圖像經(jīng)小波變換后,選擇內(nèi)嵌水印所需要的子帶,水印根據(jù)鄰居特征平均值法和奇偶判決法內(nèi)嵌到頻域中所選擇的子帶上。實(shí)驗(yàn)結(jié)論和攻擊測(cè)試表明,該文所提議的算法能得到高逼真度的加水印圖像,對(duì)如 JPEG有損壓縮、中值濾波、附加噪聲、伸縮、裁剪等各種圖像處理的攻擊有較強(qiáng)的穩(wěn)健性。
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關(guān)鍵詞:
- 數(shù)字水印; 小波變換; 鄰居特征平均值; 奇偶判決法
Abstract: A digital watermark is an invisible mark embedded in digital images,video or audio documentSjWhich may be used for a number of different purposes including copyright protec-tion,authentication and captioning, In this paper, an effective adaptive watermarking algorithm for still images is proposed. This is a blind watermarking which can confirm the copyright with-out original image. The original image is transformed using wavelet transform and the water-mark is embedded in selected subband of frequency domain according to neighboring symbols mean value and odd-even adjugement rule. Experimental results and attack analysis show that the watermark algorithm proposed in this paper can produce the watermarked image which has high fidelity and is robust against, some image processing operations, such as JPEG lossy compression,median filtering, additive noise, scaling, and cropping attacks. -
X. Xia.[J].C. G. Boncelet, G. R. Arce, A multiresolution watermark for digital images, Proc. 4th IEEE Int. Conf. Image Processing97, Santa Barbara, CA.1997,:-[2]I. J Cox, et al., Secure spread spectrum watermarking for multimedia, IEEE Trans. on Image Processing, 1997, 12(6), 1673-1687.[3]R. Dugad, K. Ratakonda, N. Ahuja, A new wavelet-based scheme for watermarking image, 1998International Conference on Image Processing, Chicago, USA, 1998, vol 2,419-423.[4]C.I. Podilchuk, W. Zeng, Image-adaptive watermarking using visual models, IEEE J. on Selected Areas in Communications, 1998, 16(4), 525-539.[5]Ikpyo Hong, et al., A blind watermarking technique using wavelet transform, Industrial Electronics, 2001, Proceedings, ISIE 2001, IEEE International Symposium, Pusan, Korea, 2001, vol 3,1946-1950. -
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