Unfortunately, we have to accept that there is no way we can tell the difference (or let's say articulate the difference to be more precise) between what is enhanced and what is not and upto what extentent. Obviously, you can tell if it is totally fake but let's say it's 20% enhanced with popped colors and other refinements for extra sharpness, can you articulate the difference?
We can't make rules for which we have very few enforcement capabilities, this will only going to benefit more to people whom you are trying to stop as they are the ones who know how these detection works and up to what extent.
We could have opted for a short video but then there are other concerns much more important than this event.
In this context, I was saying that we should leave these things to the fair judgment of people and the manager. All we can do is comment about certain pizzas which makes us uncomfortable  , but we have to be careful as this will affect the voting for sure and if I am not wrong it already did.
Anyway, people have different kitchen equipment (as per their financial status) this should not be allowed in principle if we are talking about a level playing field so we have to ignore filters as well. Achieved skills must play a dominant role in the contest not the acquired one.