HyperMask is a system which projects an animated
face onto a physical mask, worn by an actor. As the mask moves within
a prescribed area (the stage), its position and orientation are detected
by a camera, and the projected image moves with it. Also, if the
orientation of the mask changes, the projected image changes with respect
to the viewpoint of the audience. The lips of the projected face are automatically
synchronized in real time with the voice of the actor, who also controls
the face's expressions. As a theatrical tool, HyperMask enables
a new style of storytelling, and we demonstrate this style in
short performances. However, the same technology also has applications in
offices, schools and theme parks. For example, in the so-called ``Office
of the Future'', we would like to be able to project dynamically images
and information onto moving, irregularly-shaped objects.
