一种基于Contourlet变换的图像内容认证算法  

An algorithm for image content authentication based on Contourlet transform

作　　者：秦娜[1] 张贵仓[1] 杨军彦[1] 

机构地区：[1]西北师范大学数学与信息科学学院,甘肃兰州730070

出　　处：《微型机与应用》2012年第8期32-34,共3页Microcomputer & Its Applications

摘　　要：提出了一种基于Contourlet变换的图像内容认证算法。介绍了Contourlet变换并分析了其特点,详细描述了水印的嵌入与提取过程,采用形态学算子提高了检测率。仿真实验表明,本算法在保证水印的不可见性的前提下,对常见的非恶意操作鲁棒而对恶意操作脆弱。In this paper,an algorithm used for image content authentication is proposed.In the beginning,Contourlet transform and its characteristics are introduced.Then,the process of embedding and extracting watermarking is depicted.In the end,morphological operator is adopted in the algorithm,and the capacity is improved.The experiment results demonstrate that the proposed algorithm is invisible,robust to non-malicious operation and fragile to malicious operation.

关 键 词：CONTOURLET变换 图像认证 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]