Face recognition

FaceID allows a user to unlock their own iPhone, or make Apple Pay transactions, merely by looking at the phone's front-facing TrueDepth camera. It replaces TouchID, which identifies an iPhone user by reading a fingerprint.

The iPhone X's TrueDepth camera uses three new components to accomplish face recognition:

  • The Flood Illuminator uses infrared light to invisibly illuminate the user's face, even in low-light situations.
  • The Dot Projector projects over 30,000 individual dots of focused infrared light onto the user's face.
  • The Infrared Camera reads the combined data of the Flood Illuminator and Dot Projector.

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