That's a fairly good description, but it would be a mistake to try and think that it represents the classic "Photographic Memory." An impressionistic rendering might be a better analogy, because as much as they say say that autistics have no empathy, show little emotion and all that crap, the memory pictures I keep are influenced by my state at the time the memory was formed and how I link these pictures together in an effort to be coherent is also affected by my current mood or stress and probably many other things that I will never conceive of. Some ideas are more dimensional, though, and I think of a clay-mation world that I can walk into in my mind and move things around, reshape them and control them.
The old saying that a picture is worth a thousand words may be true, but the reverse is also true. Many words are overwhelmingly complex or abstract and cause even more delay in processing, mainly due to the flood of imagery they can induce. I actually enjoy those words and, when I use them, I often wonder if anyone else is moved or stymied by them.