The problem of determining whether two face images are of the same person is known as
face verification. The input to your system will be a trial, i.e., a pair of face images that may or may not belong to the same person.  Given a trial, your goal is to output a numeric score that quantifies how similar the faces in the two images are.  A higher score will indicate higher confidence that the faces in the two images are of the same person. Please check the writeup for more details.