Researchers at MIT have developed cool new software that helps a photographer perfectly align photos and superimposes part of a historic photo from the same location over the pic. The process is very cool, but requires the new pic to be taken at the same angle and zoom level as the historic photo.
The software is designed to make it all easier to accomplish without complex setup. The MIT team was assisted by Adobe in the project. One day the team envisions the software being ran directly from the camera.
The photos that result from the software are very cool and remind me of the window Walter invented in the show Fringe to see into alternate realities.