Lee R L
Appl Opt. 1994 Jul 20;33(21):4629-38. doi: 10.1364/AO.33.004629.
Digital image analysis of the cloudless sky's daytime and twilight chromaticities challenges some existing ideas about sky colors. First, although the observed colors of the clear daytime sky do lie near the blackbody locus, their meridional chromaticity curves may resemble it very little. Second, analyses of twilight colors show that their meridional chromaticity curves vary greatly, with some surprising consequences for their calorimetric gamuts.
对无云天空的白天和黄昏色度进行数字图像分析，对一些现有的天空颜色观点提出了挑战。首先，虽然晴朗白天天空的观测颜色确实靠近黑体轨迹，但它们的子午色度曲线可能与黑体轨迹非常不同。其次，对黄昏颜色的分析表明，它们的子午色度曲线变化很大，这对它们的色度色域产生了一些惊人的影响。
