Development of a whiteness formula for surface colors under an arbitrary light source.
Development of a whiteness formula for surface colors under an arbitrary light source.
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开发了任意光源下表面颜色的白度公式。
DOI：
10.1364/oe.26.018171
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发表时间：
2018-07
期刊：
影响因子：
3.8
通讯作者：
M. Wei;Siyuan Chen;Hsin-Pou Huang;M. Luo
中科院分区：
文献类型：
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作者：
M. Wei;Siyuan Chen;Hsin-Pou Huang;M. Luo
在表面颜色工业中，白度规格是至关重要的，特别是在向物体添加荧光增白剂（FWAs）时。CIE白度公式是目前应用最广泛的白度公式，它只表征了CIE标准D65下的白度，忽略了不同光源下白度随光源光谱含量的变化。虽然在CIE白度公式中采用颜色适应变换（CAT02）在最近的研究中被发现是有效的，但它未能允许在不同相关色温（cct）之间进行比较。本研究采用单倍镜观察条件，在左侧展台采用D65模拟器，在右侧展台对8个样品在不同光源下的白度进行评估。采用D65模拟器下4个样品的白度作为白度标度辅助评价。根据实验结果，提出了用CIE白度公式表征任意光源下表面的白度，用CAT02变换样品的色度，调整色度适应因子D的程度。
The whiteness specification is critically important in surface color industry, especially when fluorescent whitening agents (FWAs) are added to objects. The CIE whiteness formula, the most widely used whiteness formula, only characterizes the whiteness under CIE standard D65, which ignores the change of whiteness under different light sources due to the spectral content of the light sources. Though the adoption of a Chromatic Adaptation Transform (CAT02) in the CIE whiteness formula was found effective in recent studies, it failed to allow a comparison across different correlated color temperatures (CCTs). In this study, a haploscopic viewing condition was employed, with a D65 simulator in the left booth, for evaluating the whiteness of eight samples under different light sources in the right booth. The whiteness of the four samples under the D65 simulator was employed as a whiteness scale to aid the evaluation. Based on the experiment results, the characterization of whiteness for a surface under an arbitrary light source is proposed to use the CIE whiteness formula with the sample chromaticities being transformed using CAT02 and an adjusted degree of chromatic adaptation factor D.