Color calibration accuracy in a color raster scanner

Details Color calibration accuracy in a color raster scanner Color calibration accuracy in a color raster scanner

1980-04-30

1982-07-27

Murray, Richard

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 146

Patent

active

043420478

ABSTRACT:
A color calibration procedure for use with a color raster scanner includes the steps of: identifying small areas on the source chart, or medium to be scanned, which contain only one color and assigning a color number to each area; positioning the scan head of the color raster scanner at two locations within the area identified and establishing the coordinate values for each of these two areas so as to bound by the coordinate definition the corners of a rectangular portion within the identified area; recording at each of a plurality of samples between the defined coordinates in each area the color samples resident therein; comparing the color samples of each color number obtained from each area with the samples obtained for each other color number of the other areas to determine the percentage of interference between colors and identifying the number of color samples which interfere with two or more colors as uncalibrated samples; and modifying the limits for a selected one of the spectral parameters associated with the interfering colors to minimize the percentage of uncalibrated data samples.

REFERENCES:
patent: 4189742 (1980-02-01), Klopsch
patent: 4204223 (1980-05-01), Gast et al.

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