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<b>It says examples of the requests that might be made include, a frown, a tongue protrusion, </b><br />
<b>an open-mouth smile, a forehead wrinkle, an eyebrow movement.</b><br />
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Google has filed a patent suggesting users pull a series of faces, like sticking out their tongue or wrinkling their nose, in place of a password to unlock their Android phones or tablets.<br />
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Google says requiring specific gestures could prevent the existing Face Unlock facility being fooled by photos, reports BBC News.<br />
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The document - which was filed in June 2012 but has only just been published - suggests the software could track a "facial landmark" to confirm a user not only looks like the device's owner but also carries out the right action.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi8yXWgOjLC0E3zmSW4CmG1sZnVndu8Ck2L5iphs8c1JeXxN4_bvnd9xSHxFBPNhuOEsGGTZSDkb8e8yVu9z4aLbPvP0ah4BiO7ZLfyG_txR4GmadhU-DwfboWm1AdzhA9sdggnTIxTeoA/s1600/Face+Password+model.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi8yXWgOjLC0E3zmSW4CmG1sZnVndu8Ck2L5iphs8c1JeXxN4_bvnd9xSHxFBPNhuOEsGGTZSDkb8e8yVu9z4aLbPvP0ah4BiO7ZLfyG_txR4GmadhU-DwfboWm1AdzhA9sdggnTIxTeoA/s1600/Face+Password+model.jpg" /></a>It says examples of the requests that might be made include, a frown, a tongue protrusion, an open-mouth smile, a forehead wrinkle, an eyebrow movement.<br />
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It says the check would work by comparing two images taken from a captured video stream of the user's face to see if the difference between them showed the gesture<br />
had been made.<br />
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The filing also notes several ways the software might check that the device was being shown a real person's face rather than doctored photographs.<br />
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These include studying other frames from the captured video stream to check that the person had made a sequence of movements to achieve the commanded gesture, and confirming all of the frames actually showed the person's face.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh8reOz8HSA42BVM2Zc6Pm7COly5tV9E09bflCoWFE_kQuiF5Y8n9_nqsok600PEcjPknIrN7y6Z3JCWPTtB9E8of-50xsZOlNZrxTOqV8605-YaFjyADYyF5ARxOx7xsfrFndd9N6VCK8/s1600/Face+Password.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="569" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh8reOz8HSA42BVM2Zc6Pm7COly5tV9E09bflCoWFE_kQuiF5Y8n9_nqsok600PEcjPknIrN7y6Z3JCWPTtB9E8of-50xsZOlNZrxTOqV8605-YaFjyADYyF5ARxOx7xsfrFndd9N6VCK8/s640/Face+Password.jpg" width="640" /></a></div>
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In addition it says the software could monitor if there were changes in the angle of the person's face to ensure the device was not being shown a still image with a fake gesture animated on top.<br />
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Such efforts might help address criticism that its current face detection software is insecure.</div>
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Google suggest users for facial password, patent to increase Android security

It says examples of the requests that might be made include, a frown, a tongue protrusion, an open-mouth smile, a forehead wrin...