查询结果:   刘海,陈军.基于QR分解的Contourlet域鲁棒盲水印算法[J].计算机应用与软件,2016,33(6):306 - 310,324.
中文标题
基于QR分解的Contourlet域鲁棒盲水印算法
发表栏目
安全技术
摘要点击数
752
英文标题
ROBUST BLIND WATERMARKING ALGORITHM IN CONTOURLET DOMAIN BASED ON QR DECOMPOSITION
作 者
刘海 陈军 Liu Hai Chen Jun
作者单位
武汉大学国家多媒体软件工程技术研究中心 湖北 武汉 430072 武汉大学深圳研究院 广东 深圳 518063    
英文单位
National Engineering Research Center for Multimedia Software,Wuhan University,Wuhan 430072,Hubei,China Research Institute of Wuhan University in Shenzhen,Shenzhen 518063,Guangdong,China    
关键词
数字水印 Contourlet变换 QR分解 鲁棒性 盲水印
Keywords
Digital watermarking Contourlet transform QR decomposition Robustness Blind watermarking
基金项目
公安部技术研究计划项目(2014JSYJA0 16)
作者资料
刘海,硕士,主研领域:图像处理,数字水印。陈军,教授。 。
文章摘要
为了提高变换域数字水印的鲁棒性,提出一种基于QR分解的Contourlet域鲁棒盲水印算法。该算法首先对二值水印图像进行Arnold置乱预处理,然后对宿主图像进行Contourlet变换,提取低频子带进行不重叠的分块,最后对每个子块依次进行QR分解,采用自适应量化策略在上三角R矩阵的第1行元素上重复嵌入1 bit水印信息。在水印提取时,根据多数原则从每个子块提取相应的1 bit水印信息。实验结果表明,该算法在取得良好不可见性的同时,对JPEG压缩、噪声、滤波、缩放和剪切等多种攻击具有较强的鲁棒性,并且可以实现水印的盲提取。
Abstract
In order to improve the robustness of digital watermarking in transform domain, this paper proposes a QR decomposition-based robust blind watermarking scheme in Contourlet domain. The scheme makes pre-treatment on original binary watermark image with Arnold scrambling first, and then conducts Contourlet transform on host image followed by extracting low frequency sub-band to divide it into non-overlapping sub-blocks, finally it applies the QR decomposition to each sub-block in turn, and repeatedly embeds one bit of watermark information into the first row elements of upper triangular R matrix using adaptive quantisation strategy. In watermark extraction, according to the rule of majority, corresponding one bit of watermark information will be extracted from each sub-block. Experimental results show that the scheme has good invisibility and robustness against the attacks of JPEG compression, noise, filtering, scaling and cropping, and can achieve blind watermark extraction as well.
下载PDF全文