Digital image forming apparatus

Details Digital image forming apparatus Digital image forming apparatus

1993-05-17

1999-12-28

O'Shea, Sandra

Facsimile and static presentation processing

Natural color facsimile

Color correction

H04N 146

Patent

active

060089113

ABSTRACT:
In a digital image forming apparatus wherein a user can change a gradation curve of the density of reproduced image plotted against the input image signal obtained by reading a document, it is needed to compensate a change of color of a reproduced image accompanied by the selection of a changed gradation curve. Then, when input multi-tone image signals of R, G and B are converted to multi-tone image signals of Y, M and C for printing, the masking coefficient used for the conversion from R, G and B to Y, M and C is changed according to the changed gradation curve. Then, the multi-tone image signals of Y, M and C are converted to light quantity data of a beam for exposing a photoconductor to form an image on the photoconductor according to the gradation curve.

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