If the plate is visible and clearly readable to a human but not readable by a machine has the law been violated? In my state there is no law that requires that my license plate be viewable by ALPRs so long as it's in plain view to a human observer.

The software isn't a person and so I think there's a real question as to whether or not you can even say the license plate isn't visible to it because the software doesn't have eyes it can't observe anything, that's just our way of conceptualizing what it's doing. And I don't think this is theoretical because this idea that the machine isn't a person is argued by the state for why dragnet surveillance isn't a search until a human actually goes and looks at it.