Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2004-05-05
2009-02-17
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C345S175000, C345S178000
Reexamination Certificate
active
07492357
ABSTRACT:
An apparatus for detecting a pointer relative to a touch surface includes at least two spaced imaging assemblies having overlapping fields of view encompassing the touch surface. The imaging assemblies see the touch surface in three-dimensions as a perspective view. The imaging assemblies acquire overlapping images from different locations. A processor receives and processes image data generated by at least one of the imaging assemblies to determine the location of the pointer relative to the touch surface.
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Holmgren David E.
Morrison Gerald D.
Hjerpe Richard
Katten Muchin & Rosenman LLP
Shapiro Leonid
Smart Technologies ULC
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