  Face detection is a basic task for expression recognition. The reliability of
face detection & face recognition approach has a major role on the performance
and usability of the entire system. There are several ways to undergo face
detection & recognition. We can use Image Processing Operations, various
classifiers, filters or virtual machines for the former. Various strategies are
being available for Facial Expression Detection. The field of facial expression
detection can have various applications along with its importance & can be
interacted between human being & computer. Many few options are available to
identify a face in an image in accurate & efficient manner. Local Binary
Pattern (LBP) based texture algorithms have gained popularity in these years.
LBP is an effective approach to have facial expression recognition & is a
feature-based approach.
