ABSTRACT
For an image, there must be some statistical violations to leave by an image processing operation, so many methods to detect image based on kinds of technology. One of them is based on the constraint method which makes the image forgery using some physical or geometric relations of stereotype. The consistency of shadows is a useful constraint to find suspicious shadow. In addition, for an image with the infinite light source, illumination and shadow based on the analysis of the physical constrains can detect inconsistencies.
