A recent article outlined methods for the comparison of nearly identical images. These included a byte-by-byte comparison using specialized software as well as a visual comparison by highlighting differences in pixels between the two images based on a threshold using Photoshop. This article presents an example of image comparison and proposes another, simpler solution, using software named Beyond Compare, that may be of interest to investigators.
Comparing Nearly Identical Images Using “Beyond Compare”
Maloney, A. Comparing Nearly Identical Images Using "Beyond Compare". J. For. Ident. 2013, 63 (2), 153-164.