一种改进的非嵌入式水印算法  

An Improved No-embedded Watermarking Algorithm

作　　者：李永华[1] 张林[1] 赵玉霞[2] LI Yong-hua,ZHANG Lin,ZHAO Yu-xia （1.Modern Education Technology Center, Shangluo University, Shangiuo 726000,China; 2.Department of Computer Science, Shangluo University, Shangluo 726000, China）

机构地区：[1]商洛学院现代教育技术中心陕西商洛726000 [2]商洛学院计算机科学系,陕西商洛726000

出　　处：《电脑知识与技术》2012年第12期8254-8255,8267,共3页Computer Knowledge and Technology

基　　金：陕西省教育厅自然科学专项基金资助项目（12JK0747）; 商洛学院科研项目（10sky027,10sky019）

摘　　要：提出了一种改进的依赖于可信第三方的,抗攻击能力强的非嵌入式水印算法。算法不同于传统在原始图像中嵌入水印的做法,而是利用原始图像属性生成含有水印信息的认证码。为了提高抗攻击能力,算法对特征提取进行改进,并使用灰度图像作为水印。仿真实验表明,该算法对多种攻击如压缩、加噪、剪切等具有很好的鲁棒性。This paper proposes an improved no-embedded watermarking algorithm.The algorithm depends on the trusted of the third party, and have strong against the attack ability. Different from the traditional algorithm embedded watermarking in orig- inal image, but the use of original image attribute formation contains watermark information authentication code. In order to en- hance the against the attack abihty, the algorithm for feature extraction was improved, and use the gray image as watermark. Sim- ulation experiments show that the algorithm is applied to many kinds of attacks such as compression, add noise, shear and has very good robustness.

关 键 词：非嵌入式 数字水印 认证码 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论;自动化与计算机技术—计算机科学与技术]