Color and spectral analysis of daylight in southern Europe
Color and spectral analysis of daylight in southern Europe
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DOI：
10.1364/josaa.18.001325
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发表时间：
2001-06-01
影响因子：
1.9
通讯作者：
Lee, RL
中科院分区：
文献类型：
--
作者：
Hernández-Andrés, J;Romero, J;Lee, RL
我们分析了西班牙格拉纳达一年内所有天空状态测量的 2600 个日光光谱（水平表面上的全局光谱辐照度）的色度和光谱特征。我们详细描述了格拉纳达日光的色品坐标、相关色温 (CCT)、发光效率以及相对紫外线和红外线含量。格拉纳达日光的色度坐标远高于高 CCT (>9000 K) 下的 CIE 轨迹，5700 K 的 CCT 最能代表这种日光。我们的主成分分析表明，格拉纳达日光光谱可以通过在可见光中使用六维线性模型来充分表示，而如果我们包括紫外或近红外，则需要七维模型。然而，平均而言，只需要三维模型来重建在比色上与原始光谱无法区分的光谱。 (C) 2001 年美国光学学会。
We have analyzed the colorimetric and spectral characteristics of 2600 daylight spectra (global spectral irradiances on a horizontal surface) measured for all sky states during a a;year period at Granada, Spain. We describe in detail the chromaticity coordinates, correlated color temperatures (CCT), luminous efficacies, and relative UV and IR contents of Granada daylight. The chromaticity coordinates of Granada daylight lie far above the CIE locus at high CCTs (>9000 K), and a CCT of 5700 K best typifies this daylight. Our principal-components analysis shows that Granada daylight spectra can be adequately represented by using six-dimensional linear models in the visible, whereas seven-dimensional models are required if we include the UV or near-IR. Yet on average only three-dimensional models are needed to reconstruct spectra that are colorimetrically indistinguishable from the original spectra. (C) 2001 Optical Society of America.