Color masking parameter determining apparatus

Details Color masking parameter determining apparatus Color masking parameter determining apparatus

1995-10-18

1997-04-08

Rogers, Scott A.

Facsimile and static presentation processing

Natural color facsimile

Color correction

358523, H04N 160

Patent

active

056193483

ABSTRACT:
A color masking parameter determining apparatus comprising a virtual spectral reflectance generating means for generating virtual spectral reflectance according to spectral reflectance of actually printed color patch, a sensor output calculating means for performing calculation on virtual spectral reflectance and spectral response of the constituent elements of a sensor thereby obtaining primary color luminance as the ideal output of the sensor, a coordinate-in-uniform-color-space calculating means for calculating coordinates in the uniform color space corresponding to the virtual spectral reflectance, and a masking parameter calculating means for transforming coordinates in the uniform color space in conformity with actual phenomena to primary color luminance values by calculating arbitrary coordinates in the uniform color space using the calculated primary color luminance values and coordinates in the uniform color space thereby obtaining color masking parameters.

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