基于多层变换的置乱水印  

Scrambling Watermark Based on the Multilayer Transform

作　　者：孙际超[1] 周鸣争[1] 杨丹[1] 强俊[1] Sun Jichao;Zhou Mingzheng;Yang Dan;Qiang Jun(Anhui Polytechnic University, Wuhu Anhui 241000, China)

机构地区：[1]安徽工程大学,安徽芜湖241000

出　　处：《萍乡学院学报》2016年第3期68-71,共4页Journal of Pingxiang University

基　　金：国家自然科学基金项目(61300170);安徽工程大学青年基金项目(自然科学)(KZ00315572);安徽省高等教育提升计划自然科学项目(TSKJ2015B16)

摘　　要：文章在多层变换(即图像分层分块DCT变换)的基础上,每层加入了一种置乱后的水印,每个置乱水印由不同的离散沃尔什-哈达玛变换产生。一方面具备了多层嵌入的隐蔽性和鲁棒性,另一方面水印本身置乱后即使提取也不易被还原,从而构成了数字水印的双重保险,加大了水印的保密性和鲁棒性。Based on the image multilayer transform(or the layered-block DCT transform of the image), the paper expounds that each scrambling watermark generated from different discrete Walsh-Hadamard transforms is embedded inside each layer of the image. On the one hand, it has the concealment and robustness property of the multilayer embedding. On the other hand, the watermarking itself is not easy to restore when it has been scrambled, even if it is extracted. It constitutes double insurance of digital watermarking, then increases the advantages of confidentiality and robustness .

关 键 词：数字水印 沃尔什矩阵 置乱水印 多层嵌入 

分 类 号：TN911.73[电子电信—通信与信息系统]