Facial recognition technology isn't part of science fiction anymore, it's something that's being employed by a handful of governments around the world, and even private enterprise is getting in on it with applications like Facedeals. If you don't want to be pinged in public by a surveillance suite though, hacktivist group Anonymous have made a handy instructional video to keep you safe.

Think it's cool how Google and Facebook can automatically identify people in pictures? That might put you in the minority.

Android: Locking your Android phone's screen is a matter of basic security, but Visidion AppLock takes your privacy to the next level by using facial recognition to lock specific apps on your Android phone.

Google Image Search now makes the filters for faces, photos and news images available directly on the results page. Previously, one had to click through to the Advanced Image Search to refine your image searches. You'll find the drop-down menu to select between filters to the right of the existing menu to refine your search by image size. Which makes it even easier for fair use-enabled photochoppers to find places and faces for satirical digital compositing.