Facsimile and static presentation processing – Natural color facsimile – Color correction
Patent
1995-12-01
1998-11-17
Coles, Edward L.
Facsimile and static presentation processing
Natural color facsimile
Color correction
358518, 358504, 382165, 382167, G03F 308, G06K 900
Patent
active
058384650
ABSTRACT:
A color correcting method for a color image generating apparatus for overlapping 3 or 4 color materials according to color image data of 3 separated colors of yellow (Y), magenta (M) and cyan (C) or of 4 separated colors of Y, M, C and black (K) to obtain a multicolor image, wherein the apparatus includes a color detector, a test pattern is printed in a vertical/horizontal stripe form of 2-color combinations of 2 of the 3 or 4 colors and is measured by the color detector to find a hue value, a relative overlap deviation of the colors Y, M, C or Y, M, C, K is calculated from the found hue value, and an irradiation start position of a semiconductor laser in a main-scan direction and an irradiation start position of the semiconductor laser in a feed direction are controlled to correct the relative overlap deviation. Or a color correcting method and apparatus in which a color correction coefficient or one of a plurality of color correction tables previously prepared for overlap deviations corresponding to the color drift is selected and set in color correcting means for color correction, or color drifts in a continuous print mode and in a non-continuous print mode are corrected.
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Satou Tatsunari
Seino Taisaku
Shibuya Takeshi
Coles Edward L.
Hitachi , Ltd.
Nguyen Madeleine A-V
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