iPhone X Face ID under strong sunlight

Nikiforidis

macrumors regular
Original poster
Jul 1, 2017
125
45
Apple says that Face ID works perfectly during the night and during the day. But I am wondering if Face ID works in countries with very (very!) strong sunlight? Will the front camera recognise the dots in that case?
 

Luiggi7

macrumors regular
Jul 28, 2017
129
15
I think it will. There is a camera which launch the IR dots and another camera receives them. So the high illumination shouldn’t interfere over it.
 

MandiMac

macrumors 6502a
Feb 25, 2012
655
304
Why not? Infrared isn‘t affected by direct sunlight, and it scans your dimensions as well. So, everything should be fine.
 
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Infiniverse48

macrumors 6502a
Jun 28, 2017
881
723
From wiki: In terms of energy, sunlight at Earth's surface is around 52 to 55 percent infrared (above 700 nm), 42 to 43 percent visible (400 to 700 nm), and 3 to 5 percent ultraviolet (below 400 nm).

You could imagine this high amount of infrared radiation would overexpose the face, and make the IR sensor useless. My guess would be that the sensor is designed to filter out the longer wavelengths given off by the IR emitters on the phone, thus the other IR becomes filtered noise. Complete hypothesis though.
 

Dave245

macrumors 604
Sep 15, 2013
7,331
5,188
Ha, soon? Good luck getting your X before 2019! There is no chance Apple will be able to ship any on time. Makes no sense though since it's all old tech just pulled from old Android phones :rolleyes:
Pulled from old Android phones, Face ID isn’t pulled from old Andriod phones. Also it isn’t a race to be first, i’d much prefer to have a device that has the technology better implemented, Touch ID for example was much better when Apple did it than any of the finger print readers in competitor devices. There is no shame in taking time to get something right.
 

DNichter

macrumors G3
Apr 27, 2015
8,748
9,663
Philadelphia, PA
Pulled from old Android phones, Face ID isn’t pulled from old Andriod phones. Also it isn’t a race to be first, i’d much prefer to have a device that has the technology better implemented, Touch ID for example was much better when Apple did it than any of the finger print readers in competitor devices. There is no shame in taking time to get something right.
I was being sarcastic in my original post. The guy I responded to, I have seen in many forums dealing with constant bashing of liking the X.
 
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Relentless Power

macrumors Nehalem
Jul 12, 2016
30,368
30,637
Apple says that Face ID works perfectly during the night and during the day. But I am wondering if Face ID works in countries with very (very!) strong sunlight? Will the front camera recognise the dots in that case?
I imagine Apple has everything figured and tested for all conditions. I don't necessarily think this technology will be perfect immediately, but they will constantly keep improving where iPhone users are experiencing any type of issues and reporting them. We will know in a matter of weeks.
 

slippery-pete

macrumors 68000
Jun 23, 2007
1,650
567
Apple says that Face ID works perfectly during the night and during the day. But I am wondering if Face ID works in countries with very (very!) strong sunlight? Will the front camera recognise the dots in that case?
Why wouldn't it work???
 

santela

macrumors regular
May 15, 2017
161
229
Don’t see why that would be a problem.

But if you are wearing shades, that might be something to worry about.
 

iSayBoourns

Suspended
Sep 15, 2017
679
767
Good to know. I reckon it might have trouble with dark and large shades.
Pretty much. He said if they were too dark they could end up blocking the IR and so on from passing through the lenses of the shades. (Also potentially blocking the eyes aware feature, but that feature can be toggled off)
 

drdanick

macrumors newbie
Oct 30, 2017
2
3
Chiming in as someone who has worked with IR depth cameras in a research setting:

IR radiation from the sun does indeed interfere with most structured light depth cameras, most notably those by PrimeSense, who were acquired by Apple a while back to develop this tech for Face ID. Although it used to be the case that sunlight would render these sensors almost completely unusable anywhere that sunlight was present (even indoors, if there was enough outdoor light), there has been some developments as recent as 2015 which appear to address these issues (skip to 1:17):


I figure that Apple would have done something like the above before pushing this to market, because previously the tech really was too unreliable outdoors to be usable.

tl;dr: It's probably fine, enjoy your FaceID ;)
 

SBruv

macrumors 6502a
Sep 25, 2008
518
222
Chiming in as someone who has worked with IR depth cameras in a research setting:

IR radiation from the sun does indeed interfere with most structured light depth cameras, most notably those by PrimeSense, who were acquired by Apple a while back to develop this tech for Face ID. Although it used to be the case that sunlight would render these sensors almost completely unusable anywhere that sunlight was present (even indoors, if there was enough outdoor light), there has been some developments as recent as 2015 which appear to address these issues (skip to 1:17):


I figure that Apple would have done something like the above before pushing this to market, because previously the tech really was too unreliable outdoors to be usable.

tl;dr: It's probably fine, enjoy your FaceID ;)
Ah, a genuine expert! Excellent. While you’re here, what’s the industry thinking in terms of the risk of retinal damage through frequent eye exposure to the IR dots of these systems? None, I’m hoping...

Sorry if it’s a silly question!