Boots – shoes – and leggings
Patent
1991-05-06
1993-08-24
Cosimano, Edward R.
Boots, shoes, and leggings
178 18, 178 19, G06F 1520
Patent
active
052394891
ABSTRACT:
A digitizer tablet (10) has an array of conductors that define a sensing plane (12) for sensing an electromagnetic signal generated by a pointing device (16) disposed external to the plane. The tablet includes circuitry, coupled to the array of conductors, for determining a magnitude of an electrical signal or signals induced within the array of conductors by the pointing device. The tablet also includes a data processor (30) that is responsive to the determined magnitude for accurately estimating both a position and an angular orientation of the pointing device relative to a coordinate system associated with the sensing plane. A first position estimate derived from a zero-crossing estimator is used to position a weighting function, which is employed in a weighted least squares fit of a line to the data, resulting in a second zero-crossing estimate of the position of the pointing device. On this second position estimate another weighting function is centered and a tilt estimation is obtained. The tilt estimation is employed to derive a correction for the position estimate.
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Cosimano Edward R.
International Business Machines - Corporation
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