this post was submitted on 21 May 2024
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It does learn from real images, but it doesn't need real images of what it's generating to produce related content.
As in, a network trained with no exposure to children is unlikely to be able to easily produce quality depictions of children. Without training on nudity, it's unlikely to produce good results there as well.
However, if it knows both concepts it can combine them readily enough, similar to how you know the concept of "bicycle" and that of "Neptune" and can readily enough imagine "Neptune riding an old fashioned bicycle around the sun while flaunting it's tophat".
Under the hood, this type of AI is effectively a very sophisticated "error correction" system. It changes pixels in the image to try to "fix it" to matching the prompt, usually starting from a smear of random colors (static noise).
That's how it's able to combine different concepts from a wide range of images to create things it's never seen.