Color image processing device which produces a corrected color i

Details Color image processing device which produces a corrected color i Color image processing device which produces a corrected color i

1991-10-07

1993-08-03

Brinich, Stephen

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 80, H04N 146, G03F 308

Patent

active

052334120

ABSTRACT:
A processing device includes a correction table memory which stores data regarding a relationship between a predetermined number of discrete points and an equal number of corrected points. The discrete points correspond to lattice points in an RGB color lattice space. The levels of the red, green, and blue color components are assigned to the three axes of the lattice space, respectively. The corrected points are determined by producing a plurality of color charts upon successively applying m-number of first reference color image signals to a color printer, reading each of the plurality of color charts with an image scanner and outputtting m-number of second reference color image signals corresponding to the first reference color image signals, selecting n-number of the second reference color image signals from the m-number of second reference color image signals, the selected n-number of the second reference color image signals being nearer in spatial position of the color lattice point than non-selected ones of the second reference color image signals, and determining the corrected points according to specificied equation. When a color print is made, the processing device processes a color image signal representative of an original color image based on the data stored in the correction table memory.

REFERENCES:
patent: 4668980 (1987-05-01), Stansfield et al.
patent: 4727434 (1988-02-01), Kawamura
patent: 4774567 (1988-09-01), Stansfield et al.
patent: 4866514 (1989-09-01), Yeomans
patent: 4910589 (1990-03-01), Nagano et al.
patent: 4989080 (1991-01-01), Ito

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