The Effect of Reference White Adjustment in Color Application Model Between Two Imaging Devices.

• Main Authors: Wang, Yen-Ping, 王延平
• Other Authors: Wei,Yuh-Chang
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/28877744064039552667

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.