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My Hungarian is a bit rusty. Do they actively scan faces? ... or is it an on-demand thing?

If it's on-demand, police in the US have already been doing it for a while now:

http://www.nytimes.com/2015/08/13/us/facial-recognition-soft...

It is just a university research group presenting a development prototype for a police car - so it's not likely something that will be on the roads anytime soon (though the Hungarian article speculates that this would "come in handy for the september G20 meeting in Tsengdu and could be introduced there").

Their prototype can "automatically scan all faces in a sixty meter circle around the car" and be able to reconcile it with lists of suspects, even at speeds of 120km/h. It is also able to recognize and store all number plates visible around the cop car.

The Machine [1] is getting ever closer.

[1] From Person of Interest.

The article doesn't mention it directly, but it seems it will scan actively. Thanks for the info, the article says that the creating of a similar system is also in progress in the United Arab Emirates.

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