基于纹理谱的二值文档图像零水印算法  

Zero watermark algorithm for binary document images based on texture spectrum

作　　者：陈霞[1] 王希常[1] 张华英 刘江 

机构地区：[1]山东师范大学信息科学与工程学院,济南250014 [2]山东山大鸥玛软件有限公司数据研究中心,济南250100

出　　处：《计算机应用》2011年第9期2378-2381,共4页journal of Computer Applications

摘　　要：针对二值文档图像的版权保护问题,提出了一种二值文档图像零水印算法。该算法使用文档图像的局部二值模式(LBP)构造纹理谱图像,然后使用该纹理谱图像的直方图构造零水印信息。相比其他文档图像水印算法,该算法具有更好的隐蔽性,而且不会改变原始图像的信息。水印攻击包括图像剪切、加噪声和图像旋转操作,实验分析结果表明这些攻击操作对零水印信息的影响不大,最低标准相关系数在0.85以上,具有很好的稳定性。Concerning the copyright protection of binary document images, a zero watermark algorithm was proposed. This algorithm constructed the texture image based on Local Binary Pattern （LBP）, and then zero watermark information was constructed from the texture spectral histograms of the texture image. This method had a better invisibility compared to other text image watermarking, and the original image information would not be changed. Watermark attacks including image cropping, adding noise and rotation operators were tested. The experimental results show that the proposed zero watermark algorithm has a good performance in robustness. And these attack operators have little impact on zero watermark information, and the algorithm is of stability with the lowest standard correlation above 0. 85.

关 键 词：二值图像 零水印 纹理谱 版权保护 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]