I think speed of the facial recognition will make or break this. If it takes less than 500ms of me staring at it to unlock it could feel fluid enough. Any longer and it'll be annoying every time.
200ms is five frames/changes per second, and is definitely very noticeable. You may be thinking of a figure closer to about 12ms or so, which is the approximate threshold of perception for audio lag.
You can notice sub-200ms lag, but for when you aren't specifically watching for lag or firing a series of rapid events one-after-another, sub-200ms seems to be roughly the point where it "feels instantaneous."
FaceID with lag compensation! As soon as it sees a face it starts to unlock based on a fast prediction, then if the authoritative secure side of the chip says "No, authentication actually failed" it rolls back the clock and relocks itself!
That's absolutely not true. I can tell the difference between 60 hz (16ms) and my 144 hz monitor. I can tell when my 144 hz monitor is accidentally running at a lower refresh rate, including 120, 100, 75, and 60.
200 ms is like a full react/response time for a human to take action in response to input, our actual sense of time is much finer than what our nervous system can make our muscles do.
Good monitor reviews include a test of the delay. 3 frames delay (<100 ms at 60hz) is absolutely atrocious and easily detected by players in games.
But of course, that's not the problem. It's ok that the phone doesn't unlock with out me noticing the delay. It just can't be so long that I start doubting whether it works.
Yes. You'd feel quite drunk even controlling the mouse pointer with 100ms lag. This was/is actually a problem with some LCDs (VA in particular) that cached a frame or two in order to "anticipate" future changes so that they could adjust the voltage and make the image transition faster.
This overdrive is probably also the cause of burn-in-effects that seems to be especially common in VA panels.
Is that because of the faster refresh rate, or because none of those divide evenly into 144 and thus you're getting weird frame stretching?
Curious as I just got back into gaming after several years and everyone seems to love 144fps now, wondering if I should upgrade. I have a 1080Ti, so I could presumably render that
Ah, I was just wondering if running a 144hz monitor at 60hz was like watching a 24fps movie at 30fps... if that makes sense? But the monitor can just switch its actual refresh rate.
First off, as the person above said, you can start the unlocking process long before it's even facing with with touch-id, as you're taking it out of your pocket. With this, this "timer" starts only when it's fully out and facing you.
Next up, in this, it has to be facing you perfectly. You can't unlock it sneakily under the table, you can't do it while someone else is looking at your phone, etc.
Lastly, you still need to manually swipe to actually open the phone, so it's not like you're not using your finger either. If at least you could unlock it without using your hands that would be something.
At the end of the day, I still want to see properly reviews of what the actual successrate is too. It's not all about speed, if it fails 5% of the time, that's extremely annoying.
That matches what they did to touch ID in iOS 10: unlocking no longer actually took you to the home screen, just left you on the lock screen with your phone unlocked for... some... reason. There is a setting to change it, maybe there will be one for this as well.
One of the reasons was that on newer phones (the 6S and the 7) Touch ID was so fast that it was hard to even see the lock screen. If you use the home button to wake up the phone then you would be authenticated and the screen would go away before you had a chance to see anything.
Their solution was to split it into two different steps.
You have the same issue with Face ID. If the "lock screen" went away as soon as you look at your phone you could never actually look at the notifications there.
Clearly they had to do something. Does this work well? I guess we'll find out when the reviews come out.
No, the issue is different. With FaceID, if there was no swipe, your phone would unlock all the time for no reason at all. For example while driving, or while having it flat on your desk and hovering near it, and so on.
I am very skeptical about FaceID. I actually love TouchID, can hardly imagine anything better, but Apple has surprised us before.
Oh yeah, I forgot that I had to change that setting. I definitely hope it's the same with Face ID - I don't use home screen notifications for anything.