The facial recognition system, devised by Russian AI firm NTechLab (previously), has actually been in use since early this year as a pilot program, but is now in official use.
So the system works using manual queries. If the police, for instance, know that certain criminal has entered Moscow, they enter the face into the system and activate the cameras he or she is most likely to appear on. The system runs through the footage of those two thousand cameras and monitors them going forward for that specific face. When there’s a hit, police are alerted.
https://techcrunch.com/2017/09/28/moscow-officially-turns-on-facial-recognition-for-its-city-wide-camera-network
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