Survey paper: Face Detection and Face Recognition

Face recognition is one of biometric methods identifying individuals by the features of face. Research in this area has been conducted for more than 30 years; as a result, the current status of face recognition technology is well advanced. Many commercial applications of face recognition are also available such as criminal identification, security system, image and film processing. From the sequence of images captured by camera, the goal is to find best match with given image. Using a pre-stored image database, the face recognition system should be able to identify or verify one or more persons in the scene. Before face recognition is performed, the system should determine whether or not there is a face in a given image or given video, a sequence of images. This process is called face detection. Once a face is detected, face region should be isolated from the scene for the face recognition. The face detection and face extraction are often performed simultaneously. The overall process is depicted in Fig 1.