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.