抗亮度和对比度攻击的DCT域图像数字水印算法  

Image digital watermarking algorithm in DCT domain for resisting brightness-and-contrast adjusting attack

作　　者：李旭东[1] 

机构地区：[1]浙江财经大学应用数学研究所,浙江杭州310018

出　　处：《光电子．激光》2013年第6期1184-1190,共7页Journal of Optoelectronics·Laser

基　　金：教育部人文社会科学研究青年基金(12YJC880046);全国教育信息技术研究青年课题(126240620)资助项目

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DCT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。Brightness-and-contrast adjustment is the most common image processing, while lots of existing image watermarking algorithms in discrete consine transform （DCT） domain cannot resist brightnessand-contrast adjusting attack. Therefore,a revision formulas for resisting brightness-and-contrast adjusting attack is proposed, based upon the method of the revision for resisting brightness adjustment and the essential analysis on the method of relative quantization. According to the proposed revision formulas, this paper proposes a novel image digital watermarking algorithm in DCT domain for resisting brightness-and-contrast adjusting attack. Experimental results show that the proposed algorithm has good transparency for the embedded watermark and is strongly robust against brightness-and-contrast adjusting attack, and the algorithm is also robust against other common image-processing attacks, such as Gaussian filtering, median filtering, average filtering, resampling and JPEG compression.

关 键 词：数字水印 离散余弦变换(DCT) 亮度 对比度 版权保护 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TN911.73[自动化与计算机技术—计算机科学与技术]