窓を介した居室の昼光照明環境における光のやわらかさの定量化に関する研究：緩やかな変化と光の煩わしさの分析

In this study, two latent variables were quantified to predict softness based on the evaluation structure of light softness derived in a previous study. First, we conducted subject evaluation experiments and luminance distribution measurements to discover physical indicators that were highly related to the five observed variables (brightness–darkness boundary, brightness–darkness contrast, glare, window surface luminosity, and flicker). Next, we examine how to quantify the latent variables from the observed variables. Finally, using latent variables quantified from physical indicators, we predicted the apparent softness of light from the evaluation structure and found that we could predict softness (R2 =0.663).