1. A method implemented by a computer system, the method for detecting digital image compositing, said method comprising the steps of: finding an uncompressed digital image as a portion of a larger digital image having a higher likelihood of exhibiting forgery as compared to other portions of the larger digital image, the portion being found using a region-of-interest detector; detecting a first artifact in the uncompressed digital image, said first artifact being characteristic of an earlier compression of said uncompressed digital image with a predetermined compression algorithm; evaluating an interpolation marker in said uncompressed digital image to provide interpolation results; during said evaluating, counteracting a second artifact of said compression algorithm; classifying said larger digital image responsive to said interpolation results; and storing results of the classifying in a computer-readable memory device.