| Summary: | 碩士 === 中國文化大學 === 造紙印刷研究所 === 85 === In this study, the CIELAB color appearance model was adopted
which is very popular in the printing industry and is
recommended for international usage by Commission Internationale
del Eclairage (CIE) in 1976. But CIELAB equations just offer a
fix number of the reference white. The elasticity is
insufficient in the color management system. Berns (1995) try
to adjust the reference white depending on the two devices with
RLAB to find a better ratio in the cross media reference white.
The expe-riment results verify that images of the two devices
are close to the image color by adjusting the reference white.
According to Berns''s (1995) model and considering the promotion
in the print-ing industry, we can adjust printer''s cross media
reference white in the CIELAB color appearance model to find a
better ratio. There will be a smallest viewing color difference
between original and reproduction. The tone reproduction model
applies Sun''s S curve. The gamut projecting uses DE weighted
ratio projecting DL：DC﹦1：1. The color temperature of the
monitor and viewing booth is 6500K. In this experiment, the
CIELAB adjusting cross media reference white equation is: where
is cross media reference white stimulus values, is monitor
reference white stimulus values, M is monitor adjusting
percentage, is print reference white stimulus values , and P
is print adjusting percentage. and equations are similar to .
According to our experiment results, it is the better
performance when the ratios of cross media reference white are
Printer 75％ and Monitor 25％ in CIELAB color application model.
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