The present invention includes in a system and method for estimating and tracking
an orientation of a user's face by combining head tracking and face detection techniques.
The orientation of the face, or facial pose, can be expressed in terms of pitch,
roll and yaw of the user's head. Facial pose information can be used, for example,
to ascertain in which direction the user is looking. In general, the facial pose
estimation method obtains a position of the head and a position of the face and
compares the two to obtain the facial pose. In particular, a camera is used to
obtain an image containing a user's head. Any movement of the user's head is tracked
and the head position is determined. A face then is detected on the head and the
face position is determined. The head and face positions then are compared.