How does a computer recognize a face?
Face Math Magic
How does a computer recognize a face?
You unlock your phone with your face. Your computer tags you in photos. Airport gates scan travelers and wave them through. How does a machine — a thing with no eyes, no brain — look at a face and know whose face it is?
First, the camera snaps a picture. But the computer doesn't see a face the way you do. You see eyes, a nose, a smile. The computer sees a grid of numbers — millions of tiny measurements of light and dark, one number for every pixel.
