全順応レベルにおける明るさ及び明度知覚の評価

概要

論文の詳細を見る
Brightness and lightness of achromatic surface colors were evaluated under various illuminance conditions in order to make a brightness scale that can be applied for all adaptation levels. A pair of gray scales made up of six gray color chips were presented in a test field and a reference field. Brightness as well as subjective lightness of the six test colrs were evaluated using a gray scale in the reference field. Not only haploscopic and also binocular viewing conditions were employed. Furthermore, two comparison techniques-a conventional direct comparison method and a newly developed eascade comparison method-were used in the case of brightness criterion. Experimental results show that the perceived contrast decreased with decreasing illuminance for the brightness criteria. The contrast compression for a cascade comparison was larger than that for a direct conmparison. No contrast compression was obtained for the criterion of subjective lightness.
社団法人照明学会の論文
1998-05-01