system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 How does my iPhone Face ID still recognize me even after I grew a beard and wear sunglasses? How does it know I’m not an imposter in disguise?
gpt
the ai measures the distances between features of your face e.g nose width, distances between brows, your brow ridges, forehead length, chin length all relative to other features. sunglasses and beard wont change any of that. try prosthetic makeup.