It's not a photograph, it's facial recognition. The difference is that the latter implies that a human being will look at the photograph and your face, and compare them. A process that's resource-consuming, and thus practically limited in scope.
Facial recognition, on the other hand, can be made ubiquitous very easily thanks to modern technology, with no human intervention needed (until the handcuffing process, which still is manual, and is done "because the machine said so").
Biting the hand that feeds IT
