石原氏假同色图版的比色值随图版老化的变化
Shift of colorimetric values in ishihara pseudoisochromatic plates with plate aging.
作者信息
Hyon Joon Young, Lee Jin Hak, Wee Won Ryang
机构信息
Department of Ophthalmology, Seoul National University Bundang Hospital, Seongnam, Korea.
出版信息
Korean J Ophthalmol. 2005 Jun;19(2):145-8. doi: 10.3341/kjo.2005.19.2.145.
PURPOSE
This study aimed to quantify the shift of colorimetric values in the Ishihara pseudoisochromatic test with aging of the plates.
METHODS
Three sets of Ishihara pseudoisochromatic plates with different published dates (printed in 1971, 1983 and 2001) were tested. Positions matching 32 dots with 13 colors were chosen from each set and the colorimetric values with the CIELAB and HSB/HLS color systems were measured with a spectrophotometer. Lightness (L*), red-green (a*), blue-yellow (b*), chroma, red hue, yellow hue, and green hue values from each set were compared.
RESULTS
L* and chroma values were significantly higher in the older versions. The a* values shifted to red (increased a*) and the b* values shifted to yellow (increased b*) with plate aging.
CONCLUSIONS
Our results showed that the pseudoisochromatic plates had significant changes in color values and a directional shift with aging.
目的
本研究旨在量化石原氏假同色图测试中比色值随图版老化的变化。
方法
测试了三组出版日期不同（分别印刷于1971年、1983年和2001年）的石原氏假同色图。从每组图中选取与13种颜色匹配的32个色点位置，并用分光光度计测量CIELAB和HSB/HLS颜色系统的比色值。比较每组的明度（L*）、红绿色度（a*）、蓝黄色度（b*）、色度、红色色调、黄色色调和绿色色调值。
结果
旧版本的L和色度值显著更高。随着图版老化，a值向红色偏移（a增加），b值向黄色偏移（b*增加）。
结论
我们的结果表明，假同色图的颜色值有显著变化，且随老化有方向性偏移。
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