The AI image generator creates the output image. Since it's not human, it cannot legally hold copyright.
Still not sure as the AI, so far, can't create an image without human input. So the human, by pushing the "go" button, created the image.
Based on the copyright board ruling, it appears their view is that the human pushes the go button to trigger the image-crestion process but that the AI creates the image.
It's not unlike me writing a check for some amount abd telling an artist, "Paint a portrait of me." I wil own the portrait when it's finished but I don't get credit for having created it. The human artist gets to sign and take credit for the original work.
If I buy an AI image-creation app and tell it, "Make a portrait of me," it will make a portrait. I will own that image. But I don't get credit for making the image.
Neither, according to US copyright law, does the application. Only humans can legally hold copyright. The gundam contribution to the creation of the image was minimal. The AI app made the image, but it's not human and, therefore, can't hold copyright.
It'll be interesting to see if some legal eagle cones up with an innovative approach to determining what or who deserves credit for the creation of an original image. I'm not a lawyer so, can't imagine how that argument would be structured...other than to take the position that the AI is a sentient being so, while not being a corporeal person, deserves to be treated as an individual and to be granted copyright for their works.
Hmm, sounds like a fun movie. Denzel Washington could play the attorney for the AI and Giovanni Rabissi could play the software designer who created the AI.
The AI, so far, is just a very very sophisticated palette and paint brushes that can't do anything until the human "picks" it up and "applies" it to a "canvas". The human/company that clicked "go" can hold the copyright, IMO. Down the road that will likely change.
I will respectfully disagree on this last point and continue to be in the watch for legal rulings that define what level of human contribution/intervention merits being assigned the lion's share of the credit for the creation of an original work.