The MedRef app for Google Glass allows you to identify a person by face

And not only to identify, but also to display a large amount of information about a particular person. This application was not designed to walk the streets and find out who their name is. The developer envisaged the use of MedRef, primarily for medical professionals. For example, when looking at a patient through Google Glasses, the doctor immediately gets the name / surname of the person, plus the history of his illness, plus a lot more.

Of course, the application can also be used for non-medical purposes, but here the developer no longer takes responsibility for such use of the program. As for the doctors, I think such a program would be very useful for them. After all, the output information will contain data on allergic reactions of a person, his current vital signs, and so on.
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The program was developed by a team led by Lance Nanek. If you are interested in the source code of the program, you can find them here .

Well, the application is shown in the video: