Interactive Input System With Controlled Lighting
First Claim
Patent Images
1. An interactive input system comprising:
- at least one imaging device capturing images of a region of interest;
a plurality of radiation sources, each providing illumination to said region of interest; and
a controller coordinating the operation of said radiation sources and said at least one imaging device to allow separate image frames based on contributions from different radiation sources to be generated.
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Abstract
An interactive input system comprises at least one imaging device capturing images of a region of interest, a plurality of radiation sources, each providing illumination to the region of interest and a controller coordinating the operation of the radiation sources and the at least one imaging device to allow separate image frames based on contributions from different radiation sources to be generated.
159 Citations
47 Claims
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1. An interactive input system comprising:
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at least one imaging device capturing images of a region of interest; a plurality of radiation sources, each providing illumination to said region of interest; and a controller coordinating the operation of said radiation sources and said at least one imaging device to allow separate image frames based on contributions from different radiation sources to be generated. - 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, 25, 26, 27, 28)
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29. An interactive input system comprising:
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at least two imaging devices capturing overlapping images of a region of interest from different vantages; a radiation source associated with each imaging device to provide illumination into the region of interest; a controller timing the frame rates of the imaging devices with distinct switching patterns assigned to the radiation sources and demodulating captured image frames to generate image frames based on contributions from different radiation sources; and processing structure processing the separated image frames to determine the location of a pointer within the region of interest. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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46. A method of generating image frames in an interactive input system comprising at least one imaging device capturing images of a region of interest and multiple radiation sources providing illumination into the region of interest, said method comprising:
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turning each radiation source on and off according to a distinct pattern, the patterns being generally orthogonal; synchronizing the frame rate of the imaging device with the distinct patterns; and demodulating the captured image frames to yield image frames based on contributions from different radiation sources.
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47. In an interactive input system comprising at least one imaging device capturing images of a region of interest and multiple radiation sources providing illumination into the region of interest, an imaging method comprising:
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modulating the output of said radiation sources; synchronizing the frame rate of the imaging device with the modulated radiation source output; and demodulating captured image frames to yield image frames based on contributions from different radiation sources.
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Specification