FADTCHA / Shinseungback Kimyonghun (KR)
FADTCHA (FAce Detection Turing test to tell Computers and Humans Apart) is a type of challenge-response test to determine whether a response is generated by a computer or not. This project is inspired by CAPTCHA, but presumes the reverse situation. It requires a user to look at an image and find a face, which is visible only to computers. This test can pick out non-computers.
credit: Shinseungback Kimyonghun