一种基于双随机相位加密的全息水印算法  

A holographic watermarking algorithm based on double random phase encryption

作　　者：黄福莹[1,2] 唐振华 覃团发[1,2] HUANG Fuying;TANG Zhenhua;QIN Tuanfa(Sehool of Computer and Eleetronie Information, Guangxi University, Nanning 530004, China;Guangxi Key Laboratory for Cultivation Base of Multimedia Communieation and Network Teehnology, Nanning 530004, China)

机构地区：[1]广西大学计算机与电子信息学院,广西南宁530004 [2]广西多媒体通信与网络技术重点实验室培育基地,广西南宁530004

出　　处：《现代电子技术》2018年第12期32-35,共4页Modern Electronics Technique

基　　金：国家自然科学基金(61461006)~~

摘　　要：提出一种基于双随机相位加密的全息水印算法。首先应用双随机相位调制对原始水印进行加密产生全息水印图;然后将原始图像进行一级离散小波变换(DWT)获得低频子图,对低频子图进行分块的离散傅里叶变换(DFT)得到幅度谱;其次分别对幅度谱和全息水印图进行奇异值分解(SVD);最后将全息水印图的奇异值加权嵌入到幅度谱的奇异值。实验结果表明,该算法对旋转、平移、缩放等几何攻击具有较强的鲁棒性。A holographic watermarking algorithm based on double random phase encryption is proposed. The double random phase modulation is applied to encrypt original watermarks and generate holographic watermark images. Then the one level discrete wavelet transform（DWT）is performed for the original image to obtain the low-frequency subgraph. The partitioned discrete Fourier transform（DFT）is performed for the low-frequency subgraph to obtain the amplitude spectrum. The singular value decomposition（SVD）is performed for the amplitude spectrum and holographic watermark image. The singular values of the holographic watermark image are weighted and embedded into those of the amplitude spectrum. The experimental results show that the algorithm has strong robustness for geometric attacks such as rotation,translation and zooming.

关 键 词：双随机相位 全息水印 低频子图 离散小波变换 离散傅里叶变换 奇异值分解 

分 类 号：TN919-34[电子电信—通信与信息系统]