基于计算全息图的内容易碎水印技术  

Content fragile watermarking based on computer generated hologram

作　　者：陈经会[1] 张雪萍[1] 

机构地区：[1]河南工业大学信息科学与工程学院,河南郑州450001

出　　处：《计算机工程与设计》2008年第17期4581-4583,共3页Computer Engineering and Design

基　　金：河南省自然科学基金研究项目(0511011000);河南省科技攻关基金项目(0624220081);郑州市科技攻关基金项目(064SGDG25127-9);河南工业大学博士基金项目(2008BS003);河南省高校科技创新人才支持计划基金项目(2008HASTIT012)

摘　　要：在图像认证中,为了鉴定图像的完整性,内容易碎水印技术得到了广泛的研究和应用。结合计算全息图的内容丰富和敏感性特点,将计算全息图作为水印信息,通过傅立叶变换产生计算全息图,然后经过加密嵌入水印。在图像的认证鉴定时,通过比较提取的水印和初始水印的相关性来鉴定图像内容的完整性。同时,图像的内容被篡改时,水印信息应该提供图像被伪造的证据。实验结果表明,基于计算全息图的内容易碎水印技术可以有效地检测出图像的篡改。In the image certification, the fragile watermarking technology is researched and used widely for identifying the integrity of images. CGH is used for watermark information for its rich content and sensitivity. The hologram is generated by Fourier transform, then encrypted it as embedded watermark. The integrity of the images would be verified by the correlation between the original mark and the extracted one, as the same time, if parts of the image are replaced, the watermark information should indicate evidence of forgery. The result shows that content fragile watermarking based on computer generated hologram could detect the distortion of the images effectively.

关 键 词：易碎水印 计算全息图 图像认证 高级加密标准 线形同余 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]