Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1988-05-12
1990-07-17
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 29WD, H04N 9097, H04N 973
Patent
active
049424599
ABSTRACT:
A color temperature detecting device includes a color component detecting element for detecting electric charges for color components excited by incident light and accumulated with the lapse of time to produce color component signals, a comparison circuit for comparing the color component signals with respective given reference signals to produce discharge time length signals which correspond to the respective accumulated amounts of the electric charges, and an output part for obtaining a ratio between the color components on the basis of the discharge time length signals produced from the comparison circuit to produce a signal according to the ratio as color temperature information.
REFERENCES:
patent: 4682210 (1987-07-01), Ikemura et al.
patent: 4739392 (1988-04-01), Ueda et al.
Hieda Teruo
Masuda Kazunori
Shimizu Hiroyuki
Bauer Robert M.
Canon Kabushiki Kaisha
Groody James J.
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