Optical pointing device and method of computing movement...

Details Optical pointing device and method of computing movement... Optical pointing device and method of computing movement...

2006-09-08

2010-02-23

Harold, Jefferey F (Department: 4192)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Cursor mark position control device

C345S156000, C345S157000, C345S163000, C250S221000

Reexamination Certificate

active

07667690

ABSTRACT:
An optical pointing device includes: an image input part emitting light and accumulating the light reflected from a working surface during a sampling period to generate an analog image, and converting the analog image into a digital image to output a sample frame, a correlation matrix generator comparing the sample frame with a reference area to generate a correlation matrix, selecting one weighting matrix of a plurality of weighting matrices in response to a movement value, and outputting a weighted correlation matrix using the selected weighting matrix, a movement value calculator finding a cell having a largest correlation value among the weighted correlation matrix, calculating the movement value and outputting the movement value to a position of the cell, and transmitting the movement value to the correlation matrix generator to select a following weighting matrix, and an interface converting the outputted movement value into a signal of a certain format.

REFERENCES:
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patent: 2004/0095323 (2004-05-01), Ahn
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Korean Notice of Allowance; Jun. 1, 2007; Sep. 5, 2007-030932910. All references cited in the foreign Notice of Allowance, and not previously submitted, are listed above.

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