If you're one of those who constantly uploads photos to Facebook, you'll know how useful the auto-tagging feature is. 
Apparently Facebook is continuing to develop its algorithm to improve its facial recognition feature, and now it's doing so well that it doesn't even need to see your face to recognize you!
According to New Scientist, Facebook's artificial intelligence team is developing an experimental facial recognition algorithm to identify people, even when their faces are unclear, using many other details it has collected.
Yann LeCun, the team leader, says that “you can recognize Mark Zuckerberg very easily, because he always wears a gray T-shirt.”
In the same way, people are often able to recognize others without seeing their face.
Facebook says the new algorithm is still in the experimental stage but can identify people with a success rate of up to 83%.
The largest social network does not specify the conditions under which it manages to recognize faces without seeing them, but the success rate sounds quite high.
