How does Twins or not work?

Question

Neural networks

There was a desire to write an application similar to twins or not.
Could someone explain the main steps and where to dig?
Pretty sure it doesn't have to look so scary.
The main steps that I see
1) Search for a face
2) Normalization of the face (how?)
3) search for parameters (distances of eyebrows, eyes, nose relative to what? other parameters?)
4)????
5) Profit
I will be very grateful for the help.
Thanks in advance!

Answer 1

This is a combination of two tasks: object detection for face search (see for example https://leonardoaraujosantos.gitbooks.io/artificia...
and one-shot learning (for example, siamese network https://sorenbouma.github.io/blog/ oneshot/)