Philippe Ballard

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Control of a computer workstation via face position and facial gesturing would be an important advance for people with hand or body disabilities as well as for all users. Steps toward realization of such a system are reported here. A computer system has been developed to track the eyes and the nose of a subject and to compute the direction of the face. Face(More)
The background radiation problem encountered in astronomical observations is reviewed, and it is observed that a considerable reduction of the background radiation can be achieved by using interferometric techniques. A longitudinal radial shearing interferometer is described which meets the requirements of this application. The formal development of its(More)
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