The actual term is Eidetic Memory - the ability to recall images, sounds or objects in memory with great precision, and is not acquired through mnemonics. Interestingly there is no one able to conclusively (and scientifically) prove they have this capability (e.g. no one has film).
So that "claimed" photographic memory is a combination mnemonics and non-eidectic memory enhancing techniques (e.g. context, pattern, reconstruction etc.).
Maybe instead of film - it is rapid ability to sketch. Even that sounds sketchy. :)
UMLAF Sculpture & Garden - Austin Tx