Hi,
I’m not sure that this is the answer that you expect but there is a really nice video about Face ID on the computerphile channel on Youtube: https://www.youtube.com/watch?v=mwTaISbA87A
It can at least gives you some ideas 
Hi,
I’m not sure that this is the answer that you expect but there is a really nice video about Face ID on the computerphile channel on Youtube: https://www.youtube.com/watch?v=mwTaISbA87A
It can at least gives you some ideas