I don't understand the purpose of effectively hard-coding things like edge detection and attention weight maps into the image. There are various ways to do edge detection and various ways to focus attention, so having that fixed and encoded into the image instead of synthesizing it on demand to suit your particular ends seems suboptimal.

Wouldn't the kind of metadata that's most useful be things that can't be synthesized, like labels or (for ai-generated images) the prompt used to generate the image?