15/10/2010
Facebook introduced facial recognition for photo-tagging. To make it easier for users to tag photos, Facebook also introduced group tagging where users could type one name and apply it to multiple photos of the same person. Tag suggestions made tagging multiple photos even more convenient.
To enhance photo-tagging experience, Facebook uses its face recognition technology to match new photos to other photos the users are tagged in. Facebook group similar photos together and, whenever possible, suggest the name of the friend in the photos.