Range Based Sensing
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United States of America Patent
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Issued Date -
Sep 20, 2012
app pub date -
Dec 1, 2010
filing date -
Dec 8, 2009
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Abandoned
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Abstract
Ranging apparatus capable of projecting patterns of structured light tailored for use at particular ranges or depth regimes. Detected light points in a scene can be compared to pre-determined pattern templates to provide a simple and low cost gesture recognition system, for example as an interface to a smartphone or PDA. A structured light generator can be adapted to switch back and forth between said first and second structured patterns, either automatically according to a timing control, or adaptively in response to sensed information from the illuminated scene. Alternatively the structured light generator can be adapted to project the first and second patterns simultaneously. Separate light generators may be employed for the different patterns, or alternatively components can be shared.
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