Eidetic Memory is the scientific term for people that can "take a picture" of something they see and continue to observe it after it is gone, as if the object never went away. Having a photographic memory doesn't mean you remember details perfectly or as they were originally seen, it means that there is a long-lasting image in your head that you can continue to observe and look at, even if the image is no longer before your eyes. Further details and observations may be incorrect, due to an error in the brain that can make up or add details that make sense to be in the image.
