摘要
将图像用于司法、医学等重要领域时,往往需要对图像进行完整性认证,判断图像是否被恶意篡改。基于脆弱水印的图像完整性认证方法可以用来实现图像的篡改检测和篡改定位。针对脆弱水印在图像篡改检测中定位精度和抗复杂攻击不能同时满足的问题,提出了一种基于复杂攻击的脆弱水印图像完整性认证算法。向彩色图像R,G,B 3个通道中嵌入相同的脆弱水印,目的是检测出图像任意通道的篡改。将图像以2×2大小分块来提高定位精度,采用块验证和组验证的认证方式来检测复杂攻击的图像篡改,使用非等长图像置乱变换提高算法的普适性和抗复杂攻击的能力。仿真结果表明,所提算法具有较好的不可见性,对简单攻击、复杂攻击和混合攻击类型下的图像篡改具有更高的定位精度。
When the image is used in judicial,medical and other importantfields,it is often necessary to authenticate the integrity of the image to determine whether the image have been tampered with maliciously.The authentication method of image integrity based on fragile watermarking can be used to detect and locate the image tampering.In order to solve the problem that the localization accuracy and anti-complex attacks of fragile watermarking in image tamper detection can not be satisfied simultaneously,a complex attack based fragile watermarking for image integrity authentication algorithm is proposed in this paper.The fragile watermarking is embedded into the color image’s R,G and B channels to detect any channel tampering.In order to improve the localization accuracy,2×2 image blocks are divided.Block authentication and group authentication are used to detect the image tampering of complex attacks,and non-equilateral image scrambling transformation is used to improve the universality and anti-complex attacks ability of the algorithm.The simulation results show that the proposed algorithm has better invisibility and higher localization accuracy for image tampering under common attacks,complex attacks and multi attacks.
作者
郑秋梅
刘楠
王风华
ZHENG Qiu-mei;LIU Nan;WANG Feng-hua(College of Computer Science and Technology,China University of Petroleum Huadong,Qingdao,Shandong 266580,China)
出处
《计算机科学》
CSCD
北大核心
2020年第10期332-338,共7页
Computer Science
基金
国家自然科学基金(51274232)
山东省自然科学基金(ZR2018MEE004)
中央高校基本科研业务费专项资金(19CX02030A)。
关键词
脆弱水印
图像篡改
篡改检测
定位精度
复杂攻击
Fragile watermarking
Imagetampering
Tamper detection
Localization accuracy
Complex attack
