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?
In: Technology
You can liken Face ID to fingerprint reading. The methodology is measuring distances between points of interest. On a fingerprint it’s the distance between identifiable points arranged in a pattern. The face ID is similar but it projects a point cloud on your face and measures distances too. This time it’s things like iris width, bridge of the nose to the mouth distance, width of nose, cheek bones, etc
The face ID has enough points of measure that sunglasses dont obstruct all of them. Additionally, the camera can still see through them some of the time. A beard probably doesn’t cover much they’re interested in.
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