TechnologyPhoto: NDTV BusinessHow iPhone's 3D Face Unlock Technology Works
The iPhone's Face ID uses a complex system behind the screen cutout, which includes a flood illuminator, dot projector, and infrared camera. The flood illuminator sends invisible infrared light to locate the user's face, even in darkness. The dot projector then beams 30,000 tiny infrared dots to map the face in 3D, unlike many Android phones that use simple 2D image comparison.
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