基于NSCT和约束NMF的图像融合水印算法  

IMAGE FUSION WATERMARKING ALGORITHM BASED ON NSCT AND CONSTRAINED NMF

作　　者：魏先民[1] 

机构地区：[1]潍坊学院计算机工程学院,山东潍坊261061

出　　处：《计算机应用与软件》2012年第9期143-145,215,共4页Computer Applications and Software

基　　金：山东省自然科学基金项目(ZR2011FL006)

摘　　要：针对Contourlet变换存在频谱混淆的问题,设计一种基于非采样Contourlet变换NSCT和约束NMF结合的图像融合水印算法。首先对图像进行NSCT多层分解;然后提取低频系数并与水印序列组成二维矩阵;最后进行约束NMF分解实现水印嵌入,检测端使用基于相关的盲检测。实验结果表明,该算法能够在满足不可见性的条件下抵抗常见图像处理攻击。In order to solve the aliasing problem of Contourlet transform,an image fusion watermarking algorithm based on Nonsubsampled Contourlet Transform（NSCT） and constrained NMF is proposed in this paper.Firstly,the image is decomposed into multiple layers with NSCT.Secondly,the Tow-dimension matrix is formed by low frequency coefficients extracted combining with watermarking sequence.Finally,the watermarking is embedded by constrained NMF decomposition.The pertinence-based blind detection is used in detection end.Experimental results show that the algorithm can resist common attacks of image processing in condition of satisfying the imperceptibility.

关 键 词：数字水印 非采样CONTOURLET变换 非负矩阵分解 图像融合 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]