Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1982-10-15
1984-08-28
Britton, Howard W.
Facsimile and static presentation processing
Static presentation processing
Attribute control
353 28, 358231, 382 48, H04N 718
Patent
active
044686943
ABSTRACT:
A scanning beam display system is used as a projection display and as a reflective flying-spot scanner using a plurality of photoreceptors to sense depth. Used as a display, the projection of a document-size image from overhead onto a work surface such as a printed form provides a naturally oriented, non-invasive display. Beam modulation and contextual subtraction permit the flying-spot function in ambient light. Used as a combination display and scanner, inherent registration of the display and data input functions permit interaction with an operator by displaying on and sensing form any document or work object. A plurality of non-overlapping sensors operate with the flying-spot function to receive images alike in perspective but differing in shadow placement, from which relative distances and object boundaries are easily derived. Used without the display function, a visualization of a work area is obtained that is much more interpretable by a computer than with standard visual parallax for improved robotic visual perception. Acting in concert, the methods of this invention form a touch sensitive image on a work surface devoid of display or sensing hardware.
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Britton Howard W.
Henderson, Jr. John W.
International Business Machines - Corporation
Lefeve Douglas H.
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