Facsimile and static presentation processing – Natural color facsimile – Color correction
Patent
1994-08-11
1996-08-13
Rogers, Scott A.
Facsimile and static presentation processing
Natural color facsimile
Color correction
358519, 358520, 358523, H04N 146, H04N 156, H04N 160
Patent
active
055461956
ABSTRACT:
In a reproduced color correction system, a photometer measures external illuminant light and sends a measured result to a workstation. The workstation determines the type of an illuminant on the basis of the measured result and sends a selection signal and corresponding colorimetric value data to a neural network management unit. The neural network management unit is provided with a plurality of neural networks associated with types of illuminants. The neural network selected according to the selection signal converts the colorimetric value to a color separation value according to a post-learning transformation function. A color printing device outputs a color image on the basis of the generated color separation value. Thus, the neural network associated with the illuminant used for observation reference is selected, and appropriate color transformation is performed. Accordingly, even if the viewing condition is changed, color matching can be performed so that observed reproduced colors are unchanged.
REFERENCES:
patent: 5146328 (1992-09-01), Yamasaki et al.
patent: 5200816 (1993-04-01), Rose
patent: 5386496 (1995-01-01), Arai et al.
Rogers Scott A.
Toyo Ink Manufacturing Co. Ltd.
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