基于Arnold和DCT变换的鲁棒性图像数字水印算法  

An Robust Digital Watermarking Algorithm based on Arnold and DCT

作　　者：陈小娥[1] CHEN Xiaoe(Department of Information Engineering,Fujian Chuanzheng Communications College,Fuzhou 350007,China)

机构地区：[1]福建船政交通职业学院信息工程系,福建福州350007

出　　处：《湖州师范学院学报》2018年第10期24-29,共6页Journal of Huzhou University

基　　金：福建省中青年教师教育科研项目(JAT160704)

摘　　要：为更好地解决图像版权保护问题,提出一种基于Arnold和DCT变换的数字水印算法.利用Arnold置乱算法对水印信息进行加密;对载体图像进行分块,并在块内分别进行DCT变换;选取适合的DCT系数、水印嵌入强度以及嵌入函数,将水印信息嵌入图像中,最终实现信息隐藏.实验结果表明,嵌入的水印具有较好的隐蔽性,对裁剪攻击、高斯噪声以及压缩等常见攻击具有较强的抵抗能力,能满足图像的版权保护和数字防伪等功能.This paper presents an digital watermarking algorithm based on Arnold and DCT to solve the image copyright protection problem. The digital watermarking was encrypted by Arnold scram bling method, and then the host image was divided into blocks, and DCT was performed to every blocks. The preprocessed binary watermarking was embedded in every block according to a certain rule through choosing appropriate DCT coefficient, embedding intensity and embedded function. The experimental results show that the algorithm in this paper has good watermarking invisibility and strong robustness to up against some common attacks such as cutting attack, Gaussian noise and compression, which meets the needs of identification of image copyright information and digital anti counterfeiting.

关 键 词：ARNOLD变换 DCT变换 数字水印 噪声攻击 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]