Passive touch system and method of detecting user input
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United States of America Patent
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Jun 19, 2012
Grant Date -
Jan 4, 2007
app pub date -
Aug 31, 2006
filing date -
Jul 5, 2000
priority date (Note) -
In Force
status (Latency Note)
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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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