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Type: Journal article
Title: Unexpected artifacts in a digital photograph
Author: Sorell, M.
Citation: International Journal of Digital Crime and Forensics, 2009; 1(1):45-58
Publisher: IGI Publishing
Publisher Place: United States of America
Issue Date: 2009
ISBN: 9781609605155
ISSN: 1941-6210
Statement of
Matthew J. Sorell
Abstract: This article investigates an unexpected phenomenon observed in a recent digital photograph, in which the logo of a non-sponsoring sports company appears on the jersey of a famous football player in just one of a sequence of images. After eliminating deliberate image tampering as a cause, a hypothetical sequence of circumstances is proposed, concerning the lighting, dominant colours, infrared sensitivity, optical preprocessing, image enhancement and JPEG compression. The hypotheses are tested using a digital SLR camera. The investigation is of interest in a forensic context, firstly as a possible explanation in case such a photograph is observed, and secondly to be able to confirm or refute claims of such artifacts put forward claiming that a hypothetical image is not really what it claims to be.
Rights: Copyright © 2011 by IGI Global
DOI: 10.4018/jdcf.2009010103
Appears in Collections:Aurora harvest 5
Electrical and Electronic Engineering publications

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