I find it unbelieveable how some advanced neural networks can take source face and transpose it to target face with almost 100% precision even in facial expressions - all from one picture. If you told me that would be possible 10 years ago, i would tell you you read too much scifi.
So how do they work exactly?
Your mom and dad made you so they know exactly how your brain works ? …no they do not.
Well, it’s the same thing with deep neural networks : they tried to imitate (natural) neural networks … they made many recipes … some of those recipes gave good results so they just expanded on the good ones, trying to adjust this and that. They (mostly) don’t know how it works : it’s an art more than a science.