Camera-based touch system
First Claim
1. A camera-based touch system comprising:
- at least two cameras associated with a passive touch surface and having overlapping fields of view encompassing said touch surface, said at least two cameras acquiring images of said touch surface from different locations and generating image data; and
a processor receiving and processing image data generated by said at least two cameras to determine the location of a pointer relative to said touch surface when said pointer is captured in images acquired by said at least two cameras.
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Accused Products
Abstract
A camera-based touch system (50) includes a passive touch surface (60) and at least two cameras (63) associated surface. The at least two cameras (63) have overlapping fields of view (FOV) encompassing the touch surface. The at least two cameras (63) acquire images of the touch surface from different locations and generate image data. A processor (54) receives and processes image data generated by the at least two cameras to determine the location of the pointer relative to the touch surface when the pointer is captured in images acquired by the at least two cameras. Actual pointer contact with the touch surface sand pointer hover above the touch surface can be determined.
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Citations
49 Claims
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1. A camera-based touch system comprising:
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at least two cameras associated with a passive touch surface and having overlapping fields of view encompassing said touch surface, said at least two cameras acquiring images of said touch surface from different locations and generating image data; and
a processor receiving and processing image data generated by said at least two cameras to determine the location of a pointer relative to said touch surface when said pointer is captured in images acquired by said at least two cameras. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 36)
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25. A camera-based touch system comprising:
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a generally rectangular passive touch surface on which contacts are made using a pointer;
a digital camera mounted adjacent each corner of said touch surface, said digital cameras having overlapping fields of view encompassing said touch surface, said digital cameras acquiring images of said touch surface and generating image data that includes the median line x and pointer tip location z of a pointer when said pointer is captured in images acquired by said digital cameras; and
a processor receiving and processing image data generated by said digital cameras to determine the location of said pointer relative to said touch surface and whether said pointer is in contact with said touch surface. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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46. A method of detecting the position of a pointer relative to a touch surface comprising the steps of:
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acquiring images of said touch surface from different locations using cameras having overlapping fields of view and generating image data; and
processing said image data to detect the existence of a pointer within said acquired images and to determine the location of said pointer relative to said touch surface. - View Dependent Claims (47, 48, 49)
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Specification