] the above picture is notebook face recognition, looks like three cameras, the recognition principle is made by an infrared wavelength? 940 nm? Another is to receive infrared wavelengths of camera? Emit infrared wavelengths, I don't understand why can make hundreds of thousands of beam of light? If you don't have so many beams, unable to face scanning depth, low sampling rate has serious effect, the emit infrared wavelength is a VSCEL lamp bead? As far as I know, VSCEL lamp bead, exposed to only have three beams, why do thousands of beam? Apple can do 2000 X beam point sampling, need 2000 light projection? Why a small 0402 can do thousands of beam of light? Problem is a bit much, thank you very much!
CodePudding user response:
VSCEL parts have a DOE, can keep copy beam, hit the person's face in the form of speckle, IR chance taking pictures, and then through the AI algorithms to face recognition, usually wavelength of 850 nm and 940 nm, the two