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抗亮度和对比度攻击的DCT域图像数字水印算法
引用本文:李旭东.抗亮度和对比度攻击的DCT域图像数字水印算法[J].光电子.激光,2013(6):1184-1190.
作者姓名:李旭东
作者单位:浙江财经大学 应用数学研究所,浙江 杭州 310018
基金项目:教育部人文社会科学研究青年基金(12YJC880046)和全国教育信息技术研究青年课题(126240620)资助项目 (浙江财经大学 应用数学研究所,浙江 杭州 310018)
摘    要:针对现有的许多离散余弦变换(DCT)域图像数字 水印算法无法抵抗亮度和对比度调整攻击这一缺限,基于抗亮度调整修正的基本 思想和方法,提出了DCT域直流系数的抗 亮度和对比度调整的修正公式,进而提出一种新的抗亮度和对比度调整攻击的DC T域 图像数字水印算法。实验结果表明,提出的算法具有很好的水印透明性,对亮度和对比度调 整攻击具有极强的鲁棒性,对其他常规的图像处理攻击,如高斯滤波、中值滤波、平均滤波 、重采样和JPEG压缩等,均具有很强的鲁棒性。

关 键 词:数字水印    离散余弦变换(DCT)    亮度    对比度    版权保护
收稿时间:2012/10/29 0:00:00

Image digital watermarking algorithm in DCT domain for resisting brightness-and -contrast adjusting attack
Affiliation:Institute of Applied Mathematics,Zhejiang University of Finance and Economics,H angzhou 310018,China
Abstract:Brightness-and-contrast adjustment is the most common image processing ,while lots of existing image watermarking algorithms in discrete consine transf orm (DCT) domain cannot resi st brightness-and-contrast adjusting attack.Therefore,a revision formulas fo r resisting brightness-and-contrast adjusting attack is proposed,based upon the method of the revision for resisting brightness adjustment and the essential ana lysis on the method of relative quantization.According to the proposed revision formulas,this paper proposes a novel image digital wate rmarking algorithm in DCT domain for resisting brightness-and-contrast adjusti ng attack.Experimental results show that the proposed algorithm has good trans par ency for the embedded watermark and is strongly robust against brightness-and- co ntrast adjusting attack,and the algorithm is also robust against other common i mage-processing attacks,such as Gaussian filtering,median filtering,average filtering,resampling and JPEG compression.
Keywords:: digital watermarking  discrete cosine transform (DCT)  brightness  co ntrast  copyright protection
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