Method for refining an existing printer calibration using a smal

Details Method for refining an existing printer calibration using a smal Method for refining an existing printer calibration using a smal

1995-06-07

1998-04-14

Coles, Edward L.

Facsimile and static presentation processing

Natural color facsimile

Color correction

358523, H04N 146

Patent

active

057399271

ABSTRACT:
A color imaging system has a color correction table (10) connected to a printer (12). A set of refinement colors x.sub.i are selected to determine the accuracy of the system. The number of refinement colors selected is small in relation to the number of locations in the color correction table (10), e.g., 1-50%. For each refinement color x, the printer (12) prints a color patch of corresponding color. A measuring device (14) measures each color patch and determines a corresponding colorimetric value x'. A refinement table (16) is generated which maps x' to x using an error difference between x' and x. An interpolator (22) interpolates the known error values across the refinement table based on a weighted sum of the known error values. The weighting is inversely proportional to a Euclidean distance of each interpolated error value from the known error values.

REFERENCES:
patent: 4500919 (1985-02-01), Schreiber
patent: 5416613 (1995-05-01), Rolleston et al.
patent: 5471324 (1995-11-01), Rolleston
patent: 5483360 (1996-01-01), Rolleston et al.
patent: 5491568 (1996-02-01), Wan
patent: 5508826 (1996-04-01), Lloyd et al.
patent: 5528386 (1996-06-01), Rolleston et al.
patent: 5539522 (1996-07-01), Yoshida

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