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一种像素级的图像篡改认证算法
引用本文:谢建全,阳春华. 一种像素级的图像篡改认证算法[J]. 计算机应用, 2007, 27(6): 1337-1338
作者姓名:谢建全  阳春华
作者单位:1. 中南大学,信息科学与工程学院,湖南,长沙,410083;湖南财经高等专科学校,信息管理系,湖南,长沙,410205
2. 中南大学,信息科学与工程学院,湖南,长沙,410083
基金项目:国家自然科学基金 , 湖南省社会科学基金
摘    要:提出了一种用于图像内容像素级篡改认证的脆弱水印算法,能准确识别图像中被篡改的像素点,并且能容忍图像传输过程中出现的个别认证信息位的传输错误。这种算法以向左右和上下各扩展若干个像素点来产生认证信息,结合周围像素来确定嵌入的水印比特而引入基于图像的不确定性的某些算法,常常会出现被篡改的单个像素点不能被准确定位的问题,本算法可有效解决这一问题,认证信息进行加密后再进行嵌入,解决了多数像素级认证算法所出现的安全漏洞问题。

关 键 词:脆弱水印  图像认证  篡改检测
文章编号:1001-9081(2007)06-1337-02
收稿时间:2006-12-06
修稿时间:2006-12-062007-02-12

Pixel-level image modification authentication algorithm
XIE Jian-quan,YANG Chun-hua. Pixel-level image modification authentication algorithm[J]. Journal of Computer Applications, 2007, 27(6): 1337-1338
Authors:XIE Jian-quan  YANG Chun-hua
Affiliation:1. School of Information Science and Engineering, Central South University, Changsha Hunan 410083, China; 2. Department of Information Management, Hunan Finance and Economics College, Changsha Hunan 410205, China
Abstract:A fragile watermarking algorithm used to authenticate the pixel-level modification to the image content was proposed, which can distinguish pixel points modified in image and tolerate transmission errors of individual authentication information bit in the process of image transmission. In this algorithm, authentication information was produced by extending more and more pixel points toward both left-right and up-down, which ensured the accurate location of individual juggled pixels resulting from some algorithms based on image uncertainty by combining surrounding pixels to determine the embedded watermarking bits. Authentication information was embedded after encryption to avoid most problems of security bugs caused by most pixel-based authentication algorithms.
Keywords:fragile watermarking  image authentication  modification detection
本文献已被 CNKI 维普 万方数据 等数据库收录!
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