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New AI systems collide with copyright law
(www.bbc.co.uk)
This is a most excellent place for technology news and articles.
There's usually nothing left of the original image. But sometimes a specific image pops up in the dataset more often and gets overtrained, which is why you can get a pretty close copy of the Starry Night from vanilla SD. But yeah, it's not tracing.
Those instances are considered a flaw and trainers work hard to prevent them. When they do occur you have to know they're in there in order to dredge them back out.