Method of determining and storing color printing information

Details Method of determining and storing color printing information Method of determining and storing color printing information

1982-07-08

1984-11-06

Murray, Richard

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 146

Patent

active

044815328

ABSTRACT:
A method of determining a set of color correction values includes generating a set of three gray mapper, or gamma, curves and determining from these curves the amount of color correction required to duplicate a sample set of color chips utilizing the particular inks and paper to be used in the final printing process. A set of correction percentages is generated from the correction determination for each of the colors of the set of color chips and these percentages are used in conjunction with input color values to generate corrected color values. The corrected color values may be modified to permit the variable substitution of black ink for a combination of the three colored inks or may be used to compensate for variations in hue of different black inks.

REFERENCES:
patent: 2434561 (1948-01-01), Hardy et al.
patent: 3612753 (1971-10-01), Korman
patent: 4058828 (1977-11-01), Ladd
patent: 4060829 (1977-11-01), Sakamoto
Paper to Technical Association of Graphic Arts entitled "A Proposed Engineering Approach to Color Reproduction" by Irving Pobbaravsky, Jul., 1977.

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