The Library
Two improved forensic methods of detecting contrast enhancement in digital images
Tools
Lin, Xufeng, Wei, Xingjie and Li, Chang-Tsun (2014) Two improved forensic methods of detecting contrast enhancement in digital images. In: Media Watermarking, Security, and Forensics 2014, San Francisco, California, 2 Feb 2014. Published in: Proceedings of Media Watermarking, Security, and Forensics , Volume 9028 doi:10.1117/12.2038644 ISSN 0277-786X.
|
PDF
WRAP_Wei_SPIE2014-LIN-paper.pdf - Accepted Version - Requires a PDF viewer. Download (4Mb) | Preview |
Official URL: http://dx.doi.org/10.1117/12.2038644
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.
Item Type: | Conference Item (Paper) | ||||
---|---|---|---|---|---|
Subjects: | Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Computer Science | ||||
Library of Congress Subject Headings (LCSH): | Image processing -- Digital techniques, Forensic sciences | ||||
Journal or Publication Title: | Proceedings of Media Watermarking, Security, and Forensics | ||||
Publisher: | SPIE | ||||
ISSN: | 0277-786X | ||||
Book Title: | Media Watermarking, Security, and Forensics 2014 | ||||
Editor: | Alattar, Adnan M. and Memon, Nasir D. and Heitzenrater, Chad D. | ||||
Official Date: | 19 February 2014 | ||||
Dates: |
|
||||
Volume: | Volume 9028 | ||||
DOI: | 10.1117/12.2038644 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 27 December 2015 | ||||
Date of first compliant Open Access: | 27 December 2015 | ||||
Embodied As: | 1 | ||||
Conference Paper Type: | Paper | ||||
Title of Event: | Media Watermarking, Security, and Forensics 2014 | ||||
Type of Event: | Conference | ||||
Location of Event: | San Francisco, California | ||||
Date(s) of Event: | 2 Feb 2014 |
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year