International Journal of Computer Applications
A lot of researches have been now-a-days done in person authentication, mainly using face images. Person authentication applications can be used in many places practically like surveillance, criminal identification, polling stations and automated teller machine centers. High quality automatic facial expression based person authentication system is practically difficult mainly due to poses in face. This paper paves way to develop a more perfect automatic person authentication system using facial expressions. In this paper, ways to extract automatically pose free face images from video taken in normal room condition, determining mouth region, extracting features along with performance comparison in person authentication during normal and smile facial expressions is explained.