The thought was that the higher your intelligence, the higher the chance you know what you’re seeing. So if you have a high intelligence of say 19, then you need to design the check such that it’s very likely you’ll “succeed” in recognizing it, so with a D20 that means rolling under 19 (a 90% chance). A lower intelligence would actually be a good thing in this case, someone with an intelligence of 2 only has a 5% chance of “succeeding” and rolling under a 2.
Probably the confusing part here is that you still want to roll high, but it’s strange that a high roll, in some way, isn’t a success; you don’t successfully recognize what you’re looking at and that’s a good thing. Even writing this comment I kept getting it mixed up, but I think mechanically it fits the theme well.
For this picture in particular, there’s something about the screaming guy that’s setting off AI alarm bells to me. You see that sort of facial expression a lot with AI pictures when it’s trying to generate someone yelling or distressed.
Ironically, the human brain is so good at picking up patterns that after you’ve seen enough AI slop you begin to notice some of the tells for otherwise realistic pictures. That’s not to say that people could discern ALL AI pictures, but I think it is true for most of the lazy, slop pictures that are generated.