What could contain information is a book of all 512x512 images that a human being would perceive as being "an image". Ie, the vast majority of possible 512x512

What could contain information is a book of all 512x512 images that a human being would perceive as being "an image". Ie, the vast majority of possible 512x512 images look like random noise to humans. Excluding those massively shrinks the size of the book. So that does mean image model AI like dall-e/SD are effectively compression over this space of images that they can generate (which is at least attempting to emulate the space of 'meaningful images' to a human), since given a seed, they'll deterministically produce the same image, and that seed is much smaller than the information needed to describe every pixel in the image.