Exposing photo manipulation from user-guided 3D lighting analysis

Tiago Carvalho; Hany Farid; Eric R. Kee

doi:10.1117/12.2075544

4 March 2015 Exposing photo manipulation from user-guided 3D lighting analysis

Tiago Carvalho, Hany Farid, Eric R. Kee

Proceedings Volume 9409, Media Watermarking, Security, and Forensics 2015; 940902 (2015) https://doi.org/10.1117/12.2075544
Event: SPIE/IS&T Electronic Imaging, 2015, San Francisco, California, United States

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.

Citation Download Citation

Tiago Carvalho, Hany Farid, and Eric R. Kee "Exposing photo manipulation from user-guided 3D lighting analysis", Proc. SPIE 9409, Media Watermarking, Security, and Forensics 2015, 940902 (4 March 2015); https://doi.org/10.1117/12.2075544

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