Exposing Photo Manipulation from Shading and Shadows

  title={Exposing Photo Manipulation from Shading and Shadows},
  author={Eric Kee and James F. O'Brien and Hany Farid},
  journal={ACM Trans. Graph.},
We describe a method for detecting physical inconsistencies in lighting from the shading and shadows in an image. This method imposes a multitude of shading- and shadow-based constraints on the projected location of a distant point light source. The consistency of a collection of such constraints is posed as a linear programming problem. A feasible solution indicates that the combination of shading and shadows is physically consistent, while a failure to find a solution provides evidence of… CONTINUE READING