Hello Russ,
to my understanding, the question was targeted towards ensuring that all graphics in the book are included with their original size and aspect ratio.
As we're in the structured FM part of the forum I'd think that we are talking about structured files. So an XML roundtrip is the first thing that comes to mind, as most of the structures that I've seen being used are having a structapp underlying anyways.
Doing some tweaks in the RWR is much more easy to understand, than doing the scripting way from scratch - at least in my opinion.
I'm doing more or less the same with our legacy docs, to ensure they're fitting our latest requirements (as-is-import of graphics).
Probably I'm wrong understanding the goal of the original question, but that's up to Denis to answer that.
-Alex