] Perceptual user interfaces are the systems that use
] user's motion, such as the motion of the face, to
] control a program. These systems have applications in
] industry for disabled, immersive environments, security,
] video-conferencing etc. For these systems to be
] operational, they have to be able to track human faces
] both robustly and precisely.
]
] Unlike rigid bodies, faces do not have rigid features,
] which makes conventional feature tracking techniques,
] such as used in AR project, unsuitable. NouseTM, which
] stands for "Nose as Mouse" and is pronounced
] ['naus], is the CVG developed concept that yielded a
] solution to this previously unresolved problem. It is
] based on tracking the so-called convex-shape nose
] feature, which is the point on the nose closest to the
] camera. Thus defined nose feature is rotation and scale
] invariant, it is seen at all times regardless of the face
] orientation, and makes it possible to operate with the
] nose as with a mouse or a joystick. A few applications,
] such as NousePaint, multiple-user NousePong and an
] aim-n-shoot BubbleFrenzy game, have been developed to
] show the power of the technology.

I'm going to have to give this a try at home.