Two improved forensic methods of detecting contrast enhancement in digital images

Xufeng Lin, Xingjie Wei, Chang Tsun Li

Research output: Book chapter/Published conference paperConference paper

6 Citations (Scopus)

Abstract

Contrast enhancements, such as histogram equalization or gamma correction, are widely used by malicious attackers to conceal the cut-and-paste trails in doctored images. Therefore, detecting the traces left by contrast enhancements can be an effective way of exposing cut-and-paste image forgery. In this work, two improved forensic methods of detecting contrast enhancement in digital images are put forward. More specifically, the first method uses a quadratic weighting function rather than a simple cut-off frequency to measure the histogram distortion introduced by contrast enhancements, meanwhile the averaged high-frequency energy measure of his- togram is replaced by the ratio taken up by the high-frequency components in the histogram spectrum. While the second improvement is achieved by applying a linear-Threshold strategy to get around the sensitivity of threshold selection. Compared with their original counterparts, these two methods both achieve better performance in terms of ROC curves and real-world cut-and-paste image forgeries. The effectiveness and improvement of the two proposed algorithms are experimentally validated on natural color images captured by commercial camera.
Original languageEnglish
Title of host publicationProceedings of SPIE-IS and T Electronic Imaging - Media Watermarking, Security, and Forensics 2014
Place of PublicationWashington, USA
PublisherSPIE
Pages1-10
Number of pages10
Volume9028
ISBN (Print)9780819499455
DOIs
Publication statusPublished - 2014
EventMedia Watermarking, Security, and Forensics 2014 - Hilton Hotel, San Francisco, United States
Duration: 02 Feb 201406 Feb 2014
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9028?SSO=1

Conference

ConferenceMedia Watermarking, Security, and Forensics 2014
CountryUnited States
CitySan Francisco
Period02/02/1406/02/14
Internet address

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  • Cite this

    Lin, X., Wei, X., & Li, C. T. (2014). Two improved forensic methods of detecting contrast enhancement in digital images. In Proceedings of SPIE-IS and T Electronic Imaging - Media Watermarking, Security, and Forensics 2014 (Vol. 9028, pp. 1-10). [90280X] SPIE. https://doi.org/10.1117/12.2038644