Method of estimating nib position using images captured at different pen rotations

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United States of America Patent

PATENT NO 8319745
APP PUB NO 20100101873A1
SERIAL NO

12649303

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Abstract

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A method of estimating a position of nib of a pen relative to an optical sensor mounted on the pen. The method comprises the steps of: (a) placing the nib in contact with a coded surface; (b) capturing, using the sensor, at least two images of the coded surface at different rotations of the pen relative to the surface; (c) determining, from a perspective distortion of the coded surface in each image, an estimated rotation and viewing distance for each image; and (d) estimating, from the estimated rotations and viewing distances, the position of the nib relative to the optical sensor.

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Patent Owner(s)

  • SILVERBROOK RESEARCH PTY LTD

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
King, Tobin Allen Balmain, AU 593 11369
Lapstun, Paul Balmain, AU 1600 28373
Silverbrook, Kia Balmain, AU 5829 89780

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