Facsimile and static presentation processing – Natural color facsimile – Scanning
Patent
1995-06-30
1998-03-17
Coles, Sr., Edward L.
Facsimile and static presentation processing
Natural color facsimile
Scanning
358475, 358482, 358484, 358509, 358406, 250226, H04N 104, H04N 146, H04N 100, H01J 516
Patent
active
057293619
ABSTRACT:
The present invention provides a combination of first providing a coarse adjustment by varying the emitter power and duration of the emitter/detector exposure time, and then providing a fine adjustment by storing a correction value for each photodetector element. The adjustment for each photodetector corrects not only for the range, but also for the offset, providing two correction values. In a preferred embodiment, the low and high voltage reference levels for an analog to digital converter are adjusted and stored for each photodetector for each color.
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Moayer Ali
Suggs Bradley N.
Coles Sr. Edward L.
Logitech Inc.
Williams Kimberly A.
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