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dc.contributor.authorKumawat C.-
dc.contributor.authorPankajakshan, Vinod-
dc.identifier.citationSignal Processing: Image Communication(2020), 89-
dc.description.abstractIdentification of JPEG compressed images saved in uncompressed format (JPEG-U images) is an important issue in forensic analysis. The state-of-the-art JPEG compression detection methods fail to identify such images when subjected to post-processing/anti-forensic operations. In this paper, we propose a novel JPEG compression detector which is robust to post-processing and anti-forensic operations. The detector is based on the difference in the discrete cosine transform (DCT) coefficient distributions in the ac subbands of uncompressed images and JPEG-U images. We show theoretically and empirically that the probability of subband DCT coefficients which lie in the interval (−0.5,0.5) is significantly different for a JPEG-U and the corresponding uncompressed image. This difference is exploited to derive a detection statistic which is compared with a threshold to detect JPEG-U images. The detector makes use of calibration, a technique used in steganalysis, to obtain the detection statistic. The experimental results show that the proposed detector significantly outperforms the state-of-the-art detectors, especially in the presence of post-processing and anti-forensic operations.-
dc.publisherElsevier B.V.-
dc.relation.ispartofSignal Processing: Image Communication-
dc.subjectJPEG anti-forensics-
dc.subjectJPEG compression artifacts-
dc.subjectJPEG forensics-
dc.subjectDigital forensics-
dc.subjectDiscrete cosine transforms-
dc.subjectDetection methods-
dc.subjectDetection statistic-
dc.subjectDiscrete cosine transform coefficient distributions-
dc.subjectForensic analysis-
dc.subjectJPEG compressed images-
dc.subjectJPEG compression-
dc.subjectState of the art-
dc.subjectUncompressed images-
dc.titleA robust JPEG compression detector for image forensics-
dc.affiliationKumawat, C., Department of Electronics & Communication Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India-
dc.affiliationPankajakshan, V., Department of Electronics & Communication Engineering, Indian Institute of Technology Roorkee, Roorkee, 2-
dc.description.fundingAll persons who have made substantial contributions to the work reported in the manuscript (e.g. technical help, writing and editing assistance, general support), but who do not meet the criteria for authorship, are named in the Acknowledgments and have g.-
dc.description.correspondingauthorPankajakshan, V.; Department of Electronics & Communication Engineering, India; email:
Appears in Collections:Journal Publications [ECE]

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