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Exposing Digital Forgeries in Complex Lighting Environments

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2 Author(s)
Johnson, M.K. ; Dept. of Comput. Sci., Dartmouth Coll., Hanover, NH ; Farid, H.

The availability of sophisticated digital imaging technology has given rise to digital forgeries that are increasing in sophistication and frequency. We describe a technique for exposing such fakes by detecting inconsistencies in lighting. We show how to approximate complex lighting environments with a low-dimensional model and, further, how to estimate the model's parameters from a single image. Inconsistencies in the lighting model are th.en used as evidence of tampering.

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Information Forensics and Security, IEEE Transactions on  (Volume:2 ,  Issue: 3 )