基于QR码和Schur分解的双彩色盲水印算法  

Dual color blind watermarking algorithm based on QR code and Schur decomposition

作　　者：王晓红[1] 孙业强[1] 

机构地区：[1]上海理工大学出版印刷与艺术设计学院

出　　处：《光学技术》2018年第1期106-112,共7页Optical Technique

摘　　要：针对大多数盲水印算法不能抗旋转攻击及鲁棒性差的问题,提出一种将彩色QR码作为水印嵌入彩色宿主图像的强鲁棒性盲水印算法。算法基于Arnold变换对彩色QR码分通道置乱加密并归一化,将水印信息嵌入到彩色载体图像对应通道经小波变换和分块Schur分解后酉矩阵的系数差中。实验结果表明该算法具有较强的鲁棒性,能够抵抗任意角度的旋转攻击,且对裁切、JPEG压缩、高斯噪声、椒盐噪声、中值滤波、对比度增强等攻击具有较强的抵抗能力。算法在提取水印过程中不需要任何原载体图像相关信息,属于盲水印算法,在数字产品版权保护中具有较大的实际实用价值。In view of most of blind watermarking algorithms couldn＇t resist the rotation attack and the robustness is bad,one blind watermarking algorithm with strong robustness by embedding color QR code into color host image is proposed.Firstly,the color QR code as watermark is scrambled and normalized in each channel,then the watermark information are embedded into the differences of the orthogonal matrix U after the color cover image are processed by the wavelet transform and the block Schur decomposition.Experimental results show that the algorithm has high robustness,it not only has strong ability in resisting the rotation attracts but also the attacks like cutting,JPEG compression,Gaussian noise,salt and pepper noise,median filtering,contrast enhancement.At the same time,the algorithm does not need any related information of the original carrier image during the extraction watermarking process.It is a blind watermarking algorithm.So the algorithm has great practical application values in copyright protection of digital products.

关 键 词：盲水印 QR码 DWT SCHUR分解 双彩色 

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]