SIGNALING DEVICE POSITION DETERMINATION
First Claim
Patent Images
1. A system, comprising:
- a light source;
a user positioned signaling device comprising a retroreflective structure and a polarization retarder;
an image capture device that captures images of the signaling device; and
an image processor that processes the captured images and determines a position of the signaling device based, at least in part, on light polarized and reflected by the signaling device.
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Abstract
A system and method for providing user input to a device. A system includes a light source, a user positioned signaling device, an image capture device, and an image processor. The user positioned signaling device includes a retroreflective structure and a polarization retarder. The image capture device captures images of the signaling device. The image processor processes the captured images and determines a position of the signaling device based, at least in part, on light polarized and reflected by the signaling device.
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Citations
15 Claims
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1. A system, comprising:
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a light source; a user positioned signaling device comprising a retroreflective structure and a polarization retarder; an image capture device that captures images of the signaling device; and an image processor that processes the captured images and determines a position of the signaling device based, at least in part, on light polarized and reflected by the signaling device. - View Dependent Claims (2, 3, 4, 5)
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6. A method, comprising:
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illuminating a passive retroreflective device with a light source that produces light invisible to a user of the device; capturing an image of the retroreflective device; and processing the image to produce a computer control signal indicative of user movements. - View Dependent Claims (7, 8, 9, 10)
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11. A computer input device, comprising:
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a retroreflective structure; and a polarization retarder disposed over the retro-reflective structure. - View Dependent Claims (12, 13, 14, 15)
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Specification