Apparatus for non-contact 3D hand gesture recognition with code-based light sensing
First Claim
1. A non-contact 3D hand gesture recognition apparatus, comprising:
- a plurality of light emitters, each able to emit a light comprising a unique identification code, said plurality of light emitters able to emit light simultaneously or taking turns to emit light;
a controller, connected to said plurality of light emitters for controlling timing, duration and power level of light emitted by said plurality of light emitters; and
at least a light sensor, for receiving light emitted from said plurality of light emitters and reflected by an object, performing a correlation computation on said identification code to identify said unique identification code in each said reflected light and computing a power level of each said received reflected light to determine a position and distance of said object;
wherein said light sensor comprises;
an analog-to-digital converter (ADC), for converting received reflected light into a digital sequence and extracting said unique identification code from said digital sequence; and
at least a correlation module, each said correlation module receiving said unique identification code in said digital sequence and computing correlation with a unique identification code of a said light emitter to determine a power level.
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Abstract
An apparatus for non-contact 3D hand gesture recognition with code-based light sensing is provided, including a plurality of light emitters, at least a light sensor, and a controller, wherein the controller is connected to and controls the plurality of light emitters to emit lights containing a respective identification code. The emitted lights can be reflected by an object, for example, a hand in our application. The at least a light sensor can identify the original light emitter of each respective reflected light through the identification code as well as computing the power level of each respective reflected light to determine the distance or location of the object. The hand gesture recognition can be deduced based on the power levels of respective reflected lights over a time period.
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Citations
8 Claims
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1. A non-contact 3D hand gesture recognition apparatus, comprising:
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a plurality of light emitters, each able to emit a light comprising a unique identification code, said plurality of light emitters able to emit light simultaneously or taking turns to emit light; a controller, connected to said plurality of light emitters for controlling timing, duration and power level of light emitted by said plurality of light emitters; and at least a light sensor, for receiving light emitted from said plurality of light emitters and reflected by an object, performing a correlation computation on said identification code to identify said unique identification code in each said reflected light and computing a power level of each said received reflected light to determine a position and distance of said object; wherein said light sensor comprises; an analog-to-digital converter (ADC), for converting received reflected light into a digital sequence and extracting said unique identification code from said digital sequence; and at least a correlation module, each said correlation module receiving said unique identification code in said digital sequence and computing correlation with a unique identification code of a said light emitter to determine a power level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification