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A comment on Google Glass sales halted. Parent comment

Re:Google Glass sales halted by juliangregorian on Thursday January 15, 2015 @10:14PM (#8897069)
A couple years ago I worked on a product that added a feature to do, not exactly facial recognition, but "facial similarity" perhaps. Not any kind of bleeding-edge research but just a helpful little value-add. The approach we took was exactly the kind of geometrical measuring of nodes that I believe you are referring to. It worked okay.

Principal Component Analysis looks interesting, but I'm struggling to understand how 2D pixel data would be transformed into the appropriate covariance matrix. Any insight on the missing link you could offer?

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Re:Google Glass sales halted by drpgq on Friday January 16, 2015 @09:08AM (#8898942)
I would look here: http://en.wikipedia.org/wiki/Eigenface

The technology has advanced far beyond that, but that was the start where automatic face recognition first became realistically possible.

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