A Proposal of Facial Expression Analysis Using a Face Plane

Changes in facial expressions or differences in individual faces appear not only in distinctive features such as eyes, nose and mouth but also in the bone structure or the movement of facial muscles. We present a new concept that reflects the differences of the bone structure of a face andlor the movement of facial muscles and name this a face plane. The face plane can be described by a few parameters and reduce facial vague features. This paper presents the concept and shows some experimental results of the face expression analysis using the face plane.