Here’s a puzzle for you. This is a picture of a person wearing one of those creepy super-detailed silicone face masks:
Now, if you point a camera at this guy and pipe the feed into a face-recognition algorithm, it will say, yep! That’s a face! But what if you don’t want it to? What if you want to be able to differentiate between real faces and fake ones? How would you do it? I mean, those masks are pretty good.
The solution — and code to implement it (!) — is right here.
(Don’t miss the fairly surreal YouTube video at the end. That is pure 2013 right there.)