How would you solve the problem of identifying certain customer in a grocery store? Suppose our client is already signed-up on our website with an unique ID given to him. To come in to the store, firstly he must place a phone with a QR code in front of the reader, so that our server is informed on a specific client entering the shop. Then after successful authentication he heads towards the shelf with goods and pick some item. Identifying product name turned out not to be a challenge, as opposed to person.
From my perspective, the solution is to make a several photo of face from a different angle while person coming in. Quickly train CNN and feed it with face images when customer picks goods in order to choose the corresponding one.
So, what are your thoughts on this issue? What approach would you take to work it out?