轮廓波变换和正交三角分解的数字图像水印  

Digital image watermarking based on contourlet transform and QR decomposition

作　　者：庞通[1,2] 苏丽琴[3] 

机构地区：[1]广西大学数学与信息科学学院,南宁530007 [2]广西机电职业技术学院,南宁530007 [3]广西师范学院数学与统计科学学院,南宁530007

出　　处：《激光杂志》2016年第3期61-64,共4页Laser Journal

基　　金：广西高等学校计划项目(GX2014310)

摘　　要：为了保护数字图像在网络上传输的安全性,防止非法用户的盗取和使用,本文提出一种基于轮廓波变换和正交三解的数字图像水印算法。首先对当前数字图像水印算法的研究成果进行探讨,指出它们存在的不足,然后采用轮廓波变换对数字图像进行预处理,消除其中的一些噪声数据,并采用正交三角分解法对水印图像嵌入到原始载体图像中的最合适区域,最后采用具体数字图像水印的嵌入和提取实验测试其有效性。实验结果表明,本文算法可以有效抵抗噪声、剪切和压缩等几何攻击,嵌入的水印信息隐藏性相当好,而且不会破坏原始数字图像的信息,安全性相当的高。In order to protect the security of digital image transmission in the network and prevent illegal users, In this paper, a digital image watermarking algorithm based on the contour wave transform and QR decomposition is proposed. Firstly, the research results of the current digital image watermarking algorithm are discussed, and some of the defects are pointed out, and then, the digital image is pretreated by using the contour wave transform to eliminate noise data, and the QR decomposition method is used to embed the watermark image into the most suitable area, at last, it uses the embedding and extraction of the concrete digital image watermark to test its validity. Experimental results show that the proposed algorithm can effectively resist the geometric attacks such as noise, shear and compression and so on, and the embedded watermark information hiding is quite good, and it will not destroy the original digital image information.

关 键 词：数字图像 水印嵌入 水印提取 正交三角分解 

分 类 号：TN911.71[电子电信—通信与信息系统]