LINK TO THE DEMO http://bit.ly/10iAiqa
this demo allow you to authenticate based on face recognition. It use webRTC getUserMedia() for supported browser. For other it fallback to a file selection solution
It uses Skybiometry API that can be found and used easily from Mashape https://www.mashape.com/skybiometry-1/skybiometry-face-detection-and-recognition
I based some of this code on : Raymond Camden Miernicki
Disclaimer : this is just a demo for fun, of course it is not a real authentification system, and a system based on face recognition raise many security issues