Earlier quoted context omitted.
Yes. But the only reason they need to identify what is a face in the camera is as a step in facial recognition. It's not like the security cameras are adjusting their focus or exposure.
Its just security theater as a theft deterrent. The idea is that if you see a screen with a green box around your face then you believe that they've got a good look at you and if you steal then they can use the images. Walmart isn't investing money building networked cameras with the processing ability to perform facial recognition at scale in real time. It'd probably cost more money than paying employees to just wat…
They could also be recording the video and doing the facial recognition offline - the analytics aren't valuable in realtime.