数码翻拍图像取证算法

 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。

Digital Image Identification for Photographic Copying

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 p...