摘要
提出一种基于环形自同构的半脆弱数字图像水印认证算法,依据环形自同构结合图像DCT系数和图像版权信息生成水印,嵌入原始图像,水印的嵌入位置也由环形自同构决定.认证端从接收的图像中提取水印并恢复版权信息,同时生成新的水印,比较提取的水印和新的水印定位篡改区域.实验结果表明,该方法能够容忍一定程度有损压缩处理并检测定位对图像内容的恶意篡改,同时可恢复图像版权信息.
A semi-fragile watermarking scheme based on toral automorphisms was proposed for image authentication and copyright protection. According to torus automorphism, the image＇s DCT coefficients and copyright information are used to generate the secure semi-fragile watermark, and the torus automorphism also decides which region of the image the watermark should be embedded into. The authenticator acquires the copyright information from the received watermarked image and indicates the specific locations that have been malicious manipulations. The proposed scheme can accept quantization based lossy compression to a determined degree.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2005年第8期1284-1287,共4页
Journal of Shanghai Jiaotong University
基金
国家高技术研究发展计划(863)重大项目(2002AA145090)
关键词
数字图像
水印
认证
半脆弱水印
环形自同构
内容认证
版权
digital image
watermark
authentication
semi-fragile watermark
toral automorphisms content authentication
copyright
