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Proceedings Paper

Exposing photo manipulation from user-guided 3D lighting analysis
Author(s): Tiago Carvalho; Hany Farid; Eric R. Kee
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Paper Abstract

We describe a photo forensic technique based on detecting inconsistencies in lighting. This technique explicitly measures the 3-D lighting properties for individual people, objects, or surfaces in a single image. We show that with minimal training, an analyst can accurately specify 3-D shape in a single image from which 3-D lighting can be automatically estimated. A perturbation analysis on the estimated lighting is performed to yield a probabilistic measure of the location of the illuminating light. Inconsistencies in lighting within an image evidence photo tampering.

Paper Details

Date Published: 4 March 2015
PDF: 10 pages
Proc. SPIE 9409, Media Watermarking, Security, and Forensics 2015, 940902 (4 March 2015); doi: 10.1117/12.2075544
Show Author Affiliations
Tiago Carvalho, Cemaden (Brazil)
Hany Farid, Dartmouth College (United States)
Eric R. Kee, Columbia Univ. (United States)

Published in SPIE Proceedings Vol. 9409:
Media Watermarking, Security, and Forensics 2015
Adnan M. Alattar; Nasir D. Memon; Chad D. Heitzenrater, Editor(s)

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