Face detection like seen on facebook As we see in facebook, that it can detect &amp; tag persons within a picture. Is there any way to achieve this from Drupal? any module exist?

The main purpose is to verify each user account- so everybody has only one account. Lots of country people don't have any National ID/passport. So, how can we trace their unique identification? Mobile number is a way, bt one person can have multiple numbers.

OR, is there any way, we can scan finger print as iphone6 has that built-in function........

I know i'm asking for too much,,bt I already need that kinda stuff in job :( 

Any suggestions are welcome .....please
I didn't think there was a module, but I found one. Take a look at this module. From the project page:


  Face Detection module uses the jQuery Facedetection library to provide
  an image viewer jQuery plugin.
  
  It only has been tested on Chrome, Firefox 3-8, IE 9