An efficient representation for irradiance environment maps
Proceedings of the 28th annual conference on Computer graphics and interactive techniques
IEEE Transactions on Pattern Analysis and Machine Intelligence
Exposing digital forgeries by detecting inconsistencies in lighting
MM&Sec '05 Proceedings of the 7th workshop on Multimedia and security
ICPR '06 Proceedings of the 18th International Conference on Pattern Recognition - Volume 01
3D-aware image editing for out of bounds photography
Proceedings of Graphics Interface 2009
Detecting photographic composites using shadows
ICME'09 Proceedings of the 2009 IEEE international conference on Multimedia and Expo
Rendering synthetic objects into legacy photographs
Proceedings of the 2011 SIGGRAPH Asia Conference
Exposing Digital Forgeries in Complex Lighting Environments
IEEE Transactions on Information Forensics and Security - Part 1
Identifying Image Composites Through Shadow Matte Consistency
IEEE Transactions on Information Forensics and Security - Part 2
Inverse image editing: recovering a semantic editing history from a before-and-after image pair
ACM Transactions on Graphics (TOG)
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We describe a geometric technique to detect physically inconsistent arrangements of shadows in an image. This technique combines multiple constraints from cast and attached shadows to constrain the projected location of a point light source. The consistency of the shadows is posed as a linear programming problem. A feasible solution indicates that the collection of shadows is physically plausible, while a failure to find a solution provides evidence of photo tampering.