Comparison how humans detect emotions and how computer does it

Greetings,
I am working on a paper that compares how humans recognize emotions and how computers do it.
I have almost done a system that shows points of interest for computers, but what I need from You is a detailed analysis how this is done, human.

In other words: I believe that humans see someone is angry because he has narrowed lips.
It appears for my system it is the upper part of the nose only Greetings,
I am working on a paper that compares how humans recognize emotions and how computers do it.
I have almost done a system that shows points of interest for computers, but what I need from You is a detailed analysis how this is done, humans.

In other words: I believe that humans see someone is angry because he has narrowed lips.
It appears for my system it is the upper part of the nose only