基于数字签名方式的图像鉴别方法  

Image identification approach based on digital signature method

作　　者：陈海鹏[1,2] 申铉京[1,2] 李晓飞[1,2] 吕颖达[1,2] 

机构地区：[1]吉林大学计算机科学与技术学院,长春130012 [2]吉林大学符号计算与知识工程教育部重点实验室,长春130012

出　　处：《吉林大学学报（工学版）》2011年第3期734-738,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(60773098);吉林省自然科学基金项目(201115025)

摘　　要：提出了一种有效且稳健的基于数字签名方式的图像鉴别方法。该方法对图像预处理后,提取图像块均值的前五位作为被鉴别图像区别于其他图像的特征信息,并把图像进行分区处理,对区域内提取的图像块的特征信息扩展后进行RS差错控制编码,将编码后的RS校验位随机置乱后作为数字签名,然后与公开图像一起发送出去。实验结果表明:此图像鉴别方法可以有效地鉴别图像内容的真伪并对篡改区域进行定位。An effective and robust image identification approach is proposed based on digital signature. In this method, after preprocessing of images, the first five digits of the average value of image block are extracted as the distinctive information of the image, which is different from other images. Then the image is divided into regions, and the extracted distinctive information of the regions is extended for the Reed-Solomon （RS） error control coding. Finally, the digital signature, which is the randomly scrambled encode RS parity bit, is sent out together with the public image. Experiment results show that this image identification approach can effectively identify the authenticity of image content and locate the deliberate tampering.

关 键 词：图像鉴别 RS编译码 篡改检测 篡改区域定位 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]