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https://blog.oimo.io/2022/10/21/human-or-ai-walkthrough/ This is a blog that investigates ai eyes and particular and how to distinguish them from human artist made eyes. *However, in the case of AI painting, it will almost certainly change the coloring of the left and right eyes and how to add highlights . Humans can understand that ``the left and right eyes have the same physical shape and are placed in the same situation, so there is naturally a consistency there. '' I don't understand the theory "I don't really know what an eye is, but it's something like this that's placed around here, isn't it?" Still, it looks like it, so humans can recognize it as eyes, but there are still many defects in the details.
Among them, the most distinctive feature is the “ highlight that melts into the pupil and breaks the pupil ”. Humans know that ``first there is the eyeball, there is the pupil in it, and then the surrounding light is reflected to form a gloss'', so ``the highlight does not block part of the pupil. It can be understood as a matter of course that the shape of the pupil itself does not collapse, even if the AI does the same, but AI that learns only by looking at the final illustration can understand the ``logical relationship between the whites of the eyes, pupils, and highlights''. I don't recognize anything . Or rather, I can't. I didn't give it as data.
The unnatural deformation of the pupil is also one of the judgment materials. Humans know that "the pupil is originally a perfect circle", but AI trained by looking only at the final completed illustration does not know "the original shape of the pupil" . Therefore, such an error occurs.
Another feature of AI drawings is that they often subtly change the color of the left and right eyes . Of course, there are characters with different eye colors on the left and right (heterochromia), but in most cases , characters designed that way can be clearly recognized as having different colors . It is one of the criteria for judging that the colors are similar at first glance, but if you take a closer look, they are different.
However, even if there is such a character, it is not strange, so it is not an important basis. Also, it is natural for the color of the left and right eyes to change depending on the surrounding environment, so be careful not to make a mistake.*
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