FaceID rescan after failing the 1st scan

[liewht]

Hi all how does the algorithm for FACEID works?

After failing the first scan, does it continue to try a second time or there must be some action from the user to trigger a rescan?

Many times when I take it out from my pocket just to check notifications screen for messages (preview unlock when scan is successful), it doesn’t rescan automatically unless I wake for the screen to sleep, tap it to wake again, and scan.

I just only want to see what notifications I have and not go into the home screen

 

[akash.nu]

If it’s failing too often then the best thing to do is set it up again by removing the previous scan. So far all the reviews say that it’s pretty spot on.

 

[haruhiko]

Just swipe up and it will force a FaceID scan.

 

[liewht]

Just swipe up and it will force a FaceID scan.

Anyway to force a rescan without swiping up from the Home bar? I don’t want it to bring me into home screen. Just want to view the contents of the preview notifications.

So far FaceID has been spot on, but it can’t keep up to some situations whereby my face is scanned at an awkward angle upon taking out from the pocket. I narrow it down to FaceID working too fast!

 

[lordofthereef]

Hit the sleep wake button twice, slightly slower than it takes to activate Apple Pay. It’s still under a second.

 

[liewht]

Hit the sleep wake button twice, slightly slower than it takes to activate Apple Pay. It’s still under a second.

What if it’s on the table? Very unwieldy action

I’d rather it be re activated by tap to wake. Can it?

 

[lordofthereef]

What if it’s on the table? Very unwieldy action

I’d rather it be re activated by tap to wake. Can it?

I mean If you want to wait for the screen to turn off first, sure. I was assuming you wanted something faster.

 

[liewht]

I mean If you want to wait for the screen to turn off first, sure. I was assuming you wanted something faster.

Ok, that’s the next best thing I Guess. Thanks

 

[liewht]

Back to this topic, I’ve been trying the best way to get a rescan after 1st failed attempt

A lot of the times I don’t want to go into the home screen, and just want to look at hidden message notifications from the lock screen.

However if my phone is on the table, and FaceID fails, and I can’t pick it up, I use the method of “raising the home bar a few millimetres and pause”,forcing a rescan

This works, a rescan is triggered, BUT, force touching WhatsApp notification messages will not bring up the key board

Not sure if this is a bug with WhatsApp or just the architecture as sometimes it brings up the keyboard, sometimes it doesn’t. It’s inconsistent

Wish they would add an icon for FaceID rescan on the lock screen, something like the torch icon and camera icon

 

[boltjames]

You must type in your passcode after each failure or the phone does not learn that the failure is you and thus doesn’t add the failure to the database.

In fact, you’re training the phone that the failures aren’t you because you’re acting like a bad guy would- he doesn’t know the passcode so he keeps trying to be recognized.

Failure must always be followed by the passcode. The iPhone then knows it’s you and adds the misinterpreted odd angle/pose/lighting attempt to the Face ID database as a positive for next time.

 

[PeterRollback]

Hi all how does the algorithm for FACEID works?

After failing the first scan, does it continue to try a second time or there must be some action from the user to trigger a rescan?

Many times when I take it out from my pocket just to check notifications screen for messages (preview unlock when scan is successful), it doesn’t rescan automatically unless I wake for the screen to sleep, tap it to wake again, and scan.

I just only want to see what notifications I have and not go into the home screen

A fix has actually been found but it’s pretty secretive. If your X fails that first Face ID scan, simply but barely swipe up on the bottom home gesture bar (careful not too flick all the way up) and it will rescan with out sending you to the home screen.

https://twitter.com/peteralmeyda12/status/934514217734082560

 

[eye.surgeon]

You must type in your passcode after each failure or the phone does not learn that the failure is you and thus doesn’t add the failure to the database.

In fact, you’re training the phone that the failures aren’t you because you’re acting like a bad guy would- he doesn’t know the passcode so he keeps trying to be recognized.

Failure must always be followed by the passcode. The iPhone then knows it’s you and adds the misinterpreted odd angle/pose/lighting attempt to the Face ID database as a positive for next time.

I've heard others repeat this but I've never heard this is actually the case. I suspect it's urban legend.

 

[DiveKitty]

I've heard others repeat this but I've never heard this is actually the case. I suspect it's urban legend.

Except it’s not. Apple has made it clear it is machine learning with this process. Read under Advanced Technologies at https://support.apple.com/en-ca/HT208108:

Face ID automatically adapts to changes in your appearance, such as wearing cosmetic makeup or growing facial hair. If there is a more significant change in your appearance, like shaving a full beard, Face ID confirms your identity by using your passcode before it updates your face data. Face ID is designed to work with hats, scarves, glasses, contact lenses, and many sunglasses. Furthermore, it's designed to work indoors, outdoors, and even in total darkness. [\quote]

 

[jc0187]

You must type in your passcode after each failure or the phone does not learn that the failure is you and thus doesn’t add the failure to the database.

In fact, you’re training the phone that the failures aren’t you because you’re acting like a bad guy would- he doesn’t know the passcode so he keeps trying to be recognized.

Failure must always be followed by the passcode. The iPhone then knows it’s you and adds the misinterpreted odd angle/pose/lighting attempt to the Face ID database as a positive for next time.

My iPhone X must have a learning disability because damn, I’m having a less than stellar experience using faceID. I love everything about this phone. Everything BUT the faceID. I’m going to try to re-scan my face tomorrow and hopefully it fixes the issue.

 

[GBlansten]

After some Face ID issues wearing glasses I did a reset. One scan without and one with and now Face ID is great.

 

[boltjames]

I've heard others repeat this but I've never heard this is actually the case. I suspect it's urban legend.

Think about how Face ID works.

If it doesn't recognize your face on a scan it assumes you are a bad guy. So if you have a failure and you don't put in the passcode when requested and get the passcode right, what do you think Face ID does with the failed scan?

Exactly.