Also at what point is an image altered? Every camera has an ISP that improves image quality, so that shouldn’t be counted as an alteration, even if it can impact the image quite significantly. Then there’s manual tools like photoshop, which can do things like the ISP, but also a lot more and then you got some “AI” tools that blur the lines even more. At least CNNs are just filter banks with learned kernels (to be very reductive). The cut is a bit clearer with diffusion image generation and similar tech, as that stuff is just clearly fake, but what about img-to-img diffusion?