Passive touch system and method of detecting user input

Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel

Reexamination Certificate

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Details

C345S175000, C178S018010

Reexamination Certificate

active

10995377

ABSTRACT:
A passive touch system includes a passive touch surface and at least two cameras associated with the touch surface. The at least two cameras acquire images of the touch surface from different locations and have overlapping fields of view. A processor receives and processes images acquired by the at least two cameras to detect the existence of a pointer therein and to determine the location of the pointer relative to the touch surface. Actual pointer contact with the touch surface and pointer hover above the touch surface can be determined.

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International Search Report with a date of mailing of Oct. 22, 2001 for PCT/CA 01/00980 with an International Filing Date of Jul. 5, 2001.

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