PASSIVE TOUCH SYSTEM AND METHOD OF DETECTING USER INPUT
First Claim
Patent Images
1. A touch system comprising:
- a substantially rectangular touch surface;
a region of interest that is in front of, and at least partially includes, said touch surface; and
at least three digital cameras, each digital camera being mounted adjacent a different corner of said touch surface, each digital camera having a field of view that extends at least beyond an adjacent peripheral edge of said touch surface, said digital cameras being oriented to capture overlapping images of said region of interest.
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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.
98 Citations
18 Claims
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1. A touch system comprising:
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a substantially rectangular touch surface; a region of interest that is in front of, and at least partially includes, said touch surface; and at least three digital cameras, each digital camera being mounted adjacent a different corner of said touch surface, each digital camera having a field of view that extends at least beyond an adjacent peripheral edge of said touch surface, said digital cameras being oriented to capture overlapping images of said region of interest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A touch system comprising:
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a substantially rectangular touch surface; a region of interest that is in front of, and at least partially includes, said touch surface; and at least three imaging devices, each imaging device being mounted adjacent a different corner of said touch surface, said imaging devices being oriented so that the field of view of each imaging device extends at least beyond an adjacent peripheral edge of said touch surface, said imaging devices capturing overlapping images of said region of interest. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification