Comment on iPhone SE 4 Rumored to Feature Action Button, USB-C, Face ID, and More

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SimplePhysics@sh.itjust.works ⁨1⁩ ⁨year⁩ ago

Apple’s face recognition system relies on

  1. infrared light being blasted on your face
  2. infrared camera creates a map of your face based on the 30k dots blasted onto your face and stores it
  3. when you try to log in again your iPhone compares your face by repeating step 1 and 2 (but not storing the map this time) and comparing it to the map created in step 2.
  4. if the black box “machine learning” program thinks your face is similar to the map, it lets you in.

The IR blaster and camera makes Apple’s system more accurate and secure (requires 3D face) than just taking a photo of your face (2D), but it does take up more room on the notch.

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