一种高分二号影像双重水印算法  

A dual watermarking algorithm of GF-2 image

作　　者：马文骏 张黎明 王昊 蒋美容 MA Wenjun;ZHANG Liming;WANG Hao;JIANG Meirong(Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070,China;National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring,Lanzhou 730070,China;Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou 730070,China)

机构地区：[1]兰州交通大学测绘与地理信息学院,兰州730070 [2]地理国情监测技术应用国家地方联合工程研究中心,兰州730070 [3]甘肃省地理国情监测工程实验室,兰州730070

出　　处：《测绘科学》2021年第5期135-142,共8页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41761080);甘肃高等学校产业支撑引导项目(2019C-04);兰州市人才创新创业科技计划资助项目(2016-RC-59);兰州交通大学优秀平台支持项目(201806)。

摘　　要：传统水印算法无法实现同时对版权保护与内容认证的双重功能,针对GF-2影像版权保护与内容认证问题,提出一种基于DWT变换与SIFT算子的双重数字水印算法。该算法先后嵌入两重水印,第一重水印用于对影像的版权保护,第二重水印则用于影像内容认证;为了提高水印的不可感知性和鲁棒性,将版权信息经Arnold变换后作为第一重水印,并按照人类视觉的特点嵌入到DWT变换后的低频分量上;利用SIFT算子提取影像特征信息,经SVD压缩后作为第二重水印,将该水印嵌入到含第一重水印影像数据的SVD变换后数据中,得到最终含两重水印影像。影像内容的认证运用欧氏距离方法。实验表明,本方案在保持影像质量的前提下,对常见的几何攻击有较强的鲁棒性,并能够实现影像内容的认证,解决了GF-2影像版权保护和内容认证的问题。In view of the traditional watermarking algorithms cannot achieve the dual functions of copyright protection and authentication,a dual digital watermarking algorithm based on DWT and SIFT is proposed for GF-2 image copyright protection and authentication.The two watermarks were embedded in the host data,the first watermark is used for copyright protection of the image,and the second watermark is used for image authentication.In order to improve the imperceptibility and robustness of the watermark,the copyright which has been scrambled by Arnold is used as the first watermark,and is embedded into the low-frequency components after DWT according to the characteristics of human vision.SIFT operator is used to extract image feature information,which is used as the second watermark after SVD compression.The watermark is embedded in the data scrambled by SVD,which contains the first watermark image data,to achieve the final double watermark image.The authentication of image content is implemented by using the Euclidean Distance method.Experiments show that on the premise of maintaining the image quality,this scheme has strong robustness to common geometric attacks and can implement the authentication of image content,so as to solve the problems of copyright protection and authentication of GF-2 images.

关 键 词：GF-2影像 DWT SIFT 双重水印 版权保护 SVD 

分 类 号：P208[天文地球—地图制图学与地理信息工程]