Ferrero Alejandro, Bernad Berta, Campos Joaquín, Richard Noël, Fernández-Maloigne Christine, Melgosa Manuel
J Opt Soc Am A Opt Image Sci Vis. 2020 Aug 1;37(8):1266-1275. doi: 10.1364/JOSAA.394170.
The dependence of color differences on the illumination and viewing directions for two widely used gray scales for color change (SDCE and AATCC) was evaluated through measuring the spectral bidirectional reflectance distribution function (BRDF) by a gonio-spectrophotometer of metrological quality. Large incidence and viewing angles must be specially avoided using these gray scales because, in these conditions, color differences vary considerably from those established in ISO 105-A02 and ASTM D2616-12. While the visual appearance of the SDCE and AATCC gray scales for color change is similar, our results indicate that their goniochromatic properties are different. Finally, some recommendations regarding observation distance and illumination angle are given to correctly use these gray scales for visual experiments.
通过使用具有计量质量的测角分光光度计测量光谱双向反射分布函数（BRDF），评估了两种广泛使用的颜色变化灰度标度（SDCE和AATCC）的色差对照明和观察方向的依赖性。使用这些灰度标度时必须特别避免大的入射角和观察角，因为在这些条件下，色差与ISO 105 - A02和ASTM D2616 - 12中规定的色差有很大差异。虽然用于颜色变化的SDCE和AATCC灰度标度的视觉外观相似，但我们的结果表明它们的变色特性不同。最后，给出了一些关于观察距离和照明角度的建议，以便在视觉实验中正确使用这些灰度标度。
