The human face plays a dominant role in the field of human recognition among the available biometric identifiers such as finger print, hand geometry, iris, keystroke, signature and voice due to its high acceptability, universality, collectability and foolproof. Each biometric has its strengths and weakness but the choice depends upon the application. The accurate recognition of face images is essential for the applications including credit card authentication, passport identification, internet security, criminal databases, etc. The increasing need for the surveillance and security related applications in access control, law enforcement, and information safety due to criminal activities, the research interest in the face recognition has grown considerably in the domain of the pattern recognition and image analysis. Keeping all these in view, this book has been written to addresses novel issues related to the human identification, which includes facial feature extraction, face detection and face recognition tasks involved in the field of Biometric Research.