augmentation.
This
system focused on mobile devices by allowing a user to point his or her mobile phone to a person
and the system recognized his or her face. It showed tracked faces in real time and the automatic full crawl information on several social networks, including Facebook. They collected hundreds of thousands of images from Facebook to test the system. However, this system suffered from a security issue because it used anonymous authentication information. The application of this feature based-tracking research was very recently published again in CVPR 2012 for real time facial feature detection.