Watermarking can be used to find portions of the photo that have been tampered with.
It is actually pretty simple. And using AI for this is pretty stupid in my opinion.
You just disperse a little bit of additional signal in the photo, maybe divide it into lots of blocks (they don't need to be rectangles and they can overlap). Think of it as every small piece of the photo having its own signature embedded.
If you don't know how the signature was embedded or what key was used for it, you are going to disturb the signature and your editing attempt will be foiled. Not only that, but you will be able to tell which parts of the picture were touched and how so you can tell whether the picture was just cropped, brightness changed, or something else happened to it.
Watermarking can be used to find portions of the photo that have been tampered with.
It is actually pretty simple. And using AI for this is pretty stupid in my opinion.
You just disperse a little bit of additional signal in the photo, maybe divide it into lots of blocks (they don't need to be rectangles and they can overlap). Think of it as every small piece of the photo having its own signature embedded.
If you don't know how the signature was embedded or what key was used for it, you are going to disturb the signature and your editing attempt will be foiled. Not only that, but you will be able to tell which parts of the picture were touched and how so you can tell whether the picture was just cropped, brightness changed, or something else happened to it.
As you see, no need for AI...