Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1983-07-25
1986-12-30
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 29, 250226, 356402, 356416, G03F 308, H04N 973, G01J 346, G01J 350
Patent
active
046333010
ABSTRACT:
A method and apparatus for processing image signals in which image sensors produce an image signal of a specific color and an image signal of the complementary color from a color image of an original by means of filters. A white balancing correction is applied to these image signals by selectively adjusting at least one of the image signals so that the image signals are equal to one another for each picture element along the scanning direction, while a white area of the original or a reference area is being scanned. In a preferred embodiment, a digital signal representative of a specific color is obtained by attenuating the white balanced image signal of the specific color and comparing it to the white balanced image signal of the complementary color, whereby faithful color separation of the specific color is achieved.
REFERENCES:
patent: 3127517 (1964-03-01), Kestenbaum
patent: 4136360 (1979-01-01), Hoffrichter et al.
patent: 4381520 (1983-04-01), Machida et al.
patent: 4479242 (1984-10-01), Kurata
Fuji 'Xerox Co., Ltd.
Groody James J.
Svihla Randall S.
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