I can say for a certainty that this probably would be very hard to implement. What if they change one pixel to dark brown instead of it's original color, and the file is unrecognized as yours? Unless you would try and script in a system for that, but it wouldn't be easy and would probably not work all that well either.

Would love to see it, but in the end I think it's just not possible at the moment for graal in general.