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I was reading about the new face recognition unlock of Android 4.0 and was just wondering that , if I should shave my head afterwards, the face recognition still would work ?

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I would guess yes. Your hair is not part of your face (excepting the obvious facial hair like beards and so forth). – eldarerathis Feb 3 '12 at 14:23

You can "recalibrate" face unlock by switching to another type of lock screen and back, as this causes a new reference image to be taken. Meanwhile you can unlock the device with secondary measures (either PIN or pattern unlock).

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Yes, of course, obviously you can always take another reference photo. I know that. That was, of course, not the intended answer. (not that it matters so much, of course, I was just wandering about this). – Edelcom Feb 3 '12 at 16:19

Yes it should work, Since the Face recognition technology in Android ICS is designed to match the face with the help of points of recognition as shown bellow.

Face Recognition

Majority points will be applied on the facial parts. So it should recognize your face.

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