计算机工程与应用2011，Vol.47Issue(10)：8-12,26,6.DOI:10.3778/j.issn.1002-8331.2011.10.003
基于谱相关性的数字图像真伪鉴别
Spectral correlation based image authentication method for digital image forensics.
摘要
Abstract
How to discriminate between photorealistic computer generated images and real photographic images captured with a digital camera has become an important component of digital image forensics.To solve this problem,this paper presents a novel image authentication approach using spectral correlation between color planes in an image for forensic analysis In single-CCD imaging systems, only one color component per pixel is captured, the missing two color values at the pixel are interpolated by CFA(Color Filter Array).Demosaicked images by CFA interpolation exhibit higher spectral correlation between different color planes. In the suggested method, statistical spectral correlations between color components are exploited using discrete wavelet transform and normalized cross correlation to verify photographic images.Experimental results tested on the de facto standard Columbia dataset demonstrate that these features are effectual in capturing the differences between two kinds of images and the proposed method achieves promising accuracy in passive image authentication.关键词
数字图像取证/谱间相关性/被动式图像鉴别/小波分解Key words
digital image forensics/spectral correlation/passive image authentication/wavelet decomposition分类
信息技术与安全科学引用本文复制引用
康晓兵,魏生民..基于谱相关性的数字图像真伪鉴别[J].计算机工程与应用,2011,47(10):8-12,26,6.基金项目
国家自然科学基金(the National Natural Science Foundation of China under Grant No.50875215). （the National Natural Science Foundation of China under Grant No.50875215）
