Capturing hand motion
First Claim
Patent Images
1. Apparatus comprisinga portable electronic device comprisinga digital camera, anda processor configured to derive handwriting or control information based on hand motion of a writing instrument from infared light received by the digital camera directly from the writing instrument when the writing instrument is used on a writing surface, the writing instrument and writing surface being separate from the apparatus.
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Accused Products
Abstract
A portable electronic device, a digital camera associated with the portable electronic device, and software configured to run on the portable electronic device and to derive handwriting and control information from hand motion of a writing instrument in the vicinity of the digital camera.
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Citations
26 Claims
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1. Apparatus comprising
a portable electronic device comprising a digital camera, and a processor configured to derive handwriting or control information based on hand motion of a writing instrument from infared light received by the digital camera directly from the writing instrument when the writing instrument is used on a writing surface, the writing instrument and writing surface being separate from the apparatus.
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25. A method comprising
in a portable electronic device comprising a digital camera and a processor, receiving images at the digital camera comprising infared light received directly from a writing instrument being used on a writing surface, the writing instrument and writing surface being separate from the device, and deriving handwriting and control information based on hand motion of the writing instrument, from the images.
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26. Apparatus comprising
a portable electronic device comprising a digital camera, and a processor configured to derive handwriting or control information based on hand motion of a writing instrument from light received by the digital camera directly from the writing instrument when the writing instrument is used on a writing surface, the writing instrument and the writing surface being separate from the apparatus, and define a mapping between a sensor surface in the digital camera and a in response to calibration steps that include a user marking three locations on the writing surface.
Specification