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强鲁棒零水印技术
引用本文:叶天语,马兆丰,钮心忻,杨义先.强鲁棒零水印技术[J].北京邮电大学学报,2010,33(3):126-129.
作者姓名:叶天语  马兆丰  钮心忻  杨义先
作者单位:北京邮电大学,网络与交换技术国家重点实验室,北京,100876;北京邮电大学,网络与信息攻防技术教育部重点实验室,北京,100876;北京邮电大学,灾备技术国家工程实验室,北京,100876
基金项目:国家重点基础研究发展计划 (973项目) (编号:2007CB311203);国家自然科学基金(编号:60821001;U0835001;60803157);高等学校博士学科点专项科研基金(编号:20070013007)
摘    要:在保证具有良好不可见性的基础上如何尽量提高鲁棒性是设计鲁棒水印算法时所要重点考虑的问题。针对这个问题,本文利用小波变换低频子带的能量聚集效应和奇异值的稳定性,提出一种具有强鲁棒性的零水印算法。首先对原始载体图像进行离散小波变换,然后选择低频子带进行分块奇异值分解,通过判断每个子块最大奇异值的最高位数字奇偶性产生鲁棒零水印。算法没有对原始载体图像做任何改变,所以算法拥有良好不可见性。实验结果表明算法对各种攻击具备很强的鲁棒性。算法能够实现盲版权认证。

关 键 词:离散小波变换  奇异值分解  零水印  鲁棒性
收稿时间:2009-08-06
修稿时间:2009-09-08

A Zero-Watermark Technology with Strong Robustness
YE Tian-yu,MA Zhao-feng,NIU Xin-xin,YANG Yi-xian.A Zero-Watermark Technology with Strong Robustness[J].Journal of Beijing University of Posts and Telecommunications,2010,33(3):126-129.
Authors:YE Tian-yu  MA Zhao-feng  NIU Xin-xin  YANG Yi-xian
Abstract:How to enhance robustness on the basis of good invisibility is a key problem of designing robust watermark algorithm. In order to solve the problem, a zero-watermark algorithm with strong robustness is proposed based on the energy aggregation effect of discrete wavelet transform’s (DWT) low frequency band and the stability of singular values. It conducts DWT with the original image, divides its low frequency band into blocks, and conducts SVD with every block. Zero-watermark is derived by judging the parity of the first digit of the biggest singular value in every block. It essentially doesn’t do any alteration to the original image, so it has good invisibility. The experimental results show that it possesses strong robustness against various attacks. Moreover, it can accomplish blind copyright authentication.
Keywords:
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