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Old Nov 17, 2012, 06:14 AM   #1
Hawtin
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Any way to turn off face detection for iPhone 5 camera?

I genuinely think it's the face detection setting that Is causing my 5 to take ages to autofocus when opening the camera. Is there any way to turn this off so I can see if it makes a difference?

Thanks
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Old Nov 17, 2012, 06:23 AM   #2
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Quote:
Originally Posted by Hawtin View Post
I genuinely think it's the face detection setting that Is causing my 5 to take ages to autofocus when opening the camera. Is there any way to turn this off so I can see if it makes a difference?

Thanks
something must be wrong with your phone. it takes mine 1 second to autofocus and if I switch to the front facing camera it'll take 2 seconds for the green box to go away.
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Old Nov 17, 2012, 10:11 AM   #3
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I genuinely think it's the face detection setting that Is causing my 5 to take ages to autofocus when opening the camera. Is there any way to turn this off so I can see if it makes a difference?

Thanks
To answer your question, no. You cannot turn it off.
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Old Nov 17, 2012, 10:31 AM   #4
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Face detection shouldn't cause any issues with the camera focusing.
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Old Nov 20, 2012, 01:39 PM   #5
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Exclamation Sigh

I do notice my iphone5 will sometimes decide to focus on something other than what I'm filming. Irritating to say the least. I tap on the screen to get it to focus on what I want and then the thing sits there refocusing on a piece of dirt on my windshield if I'm photographing out the car window.
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Old Nov 20, 2012, 04:15 PM   #6
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Originally Posted by aliensporebomb View Post
I do notice my iphone5 will sometimes decide to focus on something other than what I'm filming. Irritating to say the least. I tap on the screen to get it to focus on what I want and then the thing sits there refocusing on a piece of dirt on my windshield if I'm photographing out the car window.
OK, if you are a camera, how would you know what your user is trying to capture so that you can make an intelligent decision on where to focus?

It does take a lot of brain power to guess correctly most of the time what someone else is trying to capture. Normally, foreground objects are chosen, which works well in the majority of the case, but then there is the wind shield issue. However, even if you can add the "skip the windshield" logic, there are times when you want to shoot the windshield, so it's foolproof either.

What you need is a camera that can read your mind to focus on what's in your brain at the moment you press the shutter.
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Old Nov 20, 2012, 05:14 PM   #7
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i think if you turned off face detection it would only cause more focusing problems
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Old Nov 20, 2012, 05:32 PM   #8
Hawtin
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Originally Posted by meistervu View Post
OK, if you are a camera, how would you know what your user is trying to capture so that you can make an intelligent decision on where to focus?

It does take a lot of brain power to guess correctly most of the time what someone else is trying to capture. Normally, foreground objects are chosen, which works well in the majority of the case, but then there is the wind shield issue. However, even if you can add the "skip the windshield" logic, there are times when you want to shoot the windshield, so it's foolproof either.

What you need is a camera that can read your mind to focus on what's in your brain at the moment you press the shutter.
Really?

So why has every other iphone camera I've used previously automatically been in focus when the camera opens?
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Old Nov 20, 2012, 05:35 PM   #9
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The dearth of options in the camera app is irritating.
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Old Nov 20, 2012, 05:40 PM   #10
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Originally Posted by Jordan921 View Post
Face detection shouldn't cause any issues with the camera focusing.
In theory, it takes time to detect faces, so turning off face detection should help. I would think that the logic go like this when the camera goes to focus:

1. Capture a sample of the image
2. Process the capture to detect foreground objects
3. Figure out if there are faces in those objects
Focus on detected faces, otherwise focus on other foreground objects. There may be some additional fuzzy logic going on to balance the depth of field.

That said, found the iPhone 5 focusing to be really quick, and I am used to the speed of an DSLR.
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Old Nov 20, 2012, 05:55 PM   #11
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Really?

So why has every other iphone camera I've used previously automatically been in focus when the camera opens?
I have owned an iPhone 3G, 4, and now 5. I find the 5 to be the fastest of them from sleep to wake up and taking photos. I am used to my DSLR with some really fast focusing lenses, and I am pleasantly surprised by how little delay is in the iPhone 5. It's a mile ahead of P&S cameras not so long ago in term of capturing speed.

The iPhone 5 does have to be more precise with its focus because of its wider aperture which can result in narrower depth of field (blurry background). This is a common problem people face when they buy an expensive lenses that can shoot at wide aperture. They suddenly have focusing problem because their depth of field is now so narrow that if they miss their focus by an inch they end up with a blurry face where as which a cheap lens the depth of field is so deep that they can miss their focus by an arm length and no one would notice the difference. What this mean is there has to be more processing going on in the back end to prevent complaints like "my picture are blurry." In my observation, all that processing did not add any delay to photo taking. On the contrary, the iPhone 5 is significantly faster than all my previous iPhone in the photo department, and the focus is often right on.
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Old Nov 20, 2012, 06:00 PM   #12
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Originally Posted by aliensporebomb View Post
I do notice my iphone5 will sometimes decide to focus on something other than what I'm filming. Irritating to say the least. I tap on the screen to get it to focus on what I want and then the thing sits there refocusing on a piece of dirt on my windshield if I'm photographing out the car window.
Just a quick tip for you... If you hold down on the screen until the box pulses, you can lock focus to infinity so you don't lose focus during video recording.
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Old Dec 4, 2012, 03:26 PM   #13
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Quote:
Originally Posted by meistervu View Post
OK, if you are a camera, how would you know what your user is trying to capture so that you can make an intelligent decision on where to focus?

It does take a lot of brain power to guess correctly most of the time what someone else is trying to capture. Normally, foreground objects are chosen, which works well in the majority of the case, but then there is the wind shield issue. However, even if you can add the "skip the windshield" logic, there are times when you want to shoot the windshield, so it's foolproof either.

What you need is a camera that can read your mind to focus on what's in your brain at the moment you press the shutter.
Go out and but a real camera ! Duh.

Not a phone with a built in camera.
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