[icebraining]

Unlike patents, the origin of the work is important for copyright infringement. In theory, two people who independently come up with the exact same image are not infringing on each other's copyright.

Of course, this ends up being a matter of likelihood. And if you generate all those combinations, but happen to select one in particular that is just like a pre-existing picture, the courts won't believe that was by accident. But the collection itself probably won't be infringing.