数码翻拍图像取证算法  

Digital Image Identification for Photographic Copying

作　　者：尹京[1] 方艳梅[1] 

机构地区：[1]中山大学信息科学与技术学院,广东广州510006

出　　处：《中山大学学报（自然科学版）》2011年第6期48-52,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家973计划资助项目(2011CB302204)

摘　　要：随着图像显示技术的不断提高,对显示媒介显示的图像,如高质量打印出的图像和LCD显示器显示的图像,进行翻拍所获得的图像质量也越来越高。这类高质量造假图像可能被造假者用于非法途径,且往往能通过当前的图像取证系统而不被识别。针对LCD显示器显示的图像的翻拍检测情况做了研究。通过分析原始获取图像过程和翻拍获取图像过程引入的噪声,以及检测两次翻拍产生的双重JPEG压缩,利用SVM(支持向量机)获得了很好的分类结果。With advances in image display technology,recapturing good-quality images from the high-fidelity artificial scenery,such as LCD screen or printed papers,becomes possible.This kind of high-quality recaptured images may be used for illegal purpose,and they can also pass current identification systems without being recognized.It is studied how to detect recaptured photographs on LCD screen.By analyzing the noise in the photographs and detecting whether it exists double JPEG compression in the photography,the proposed features work well with a support vector machine classifier.

关 键 词：图像取证 液晶显示器 翻拍图像 JPEG双重压缩 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]