均一輝度視野における視認能力の動的評価図 : 実効輝度を用いた視認能力の動的評価法(その3)

Abstract

The dynamic evaluation method of visibility can be rationalized and be simplified by introducing the concept of effective luminance. Visibility can be evaluated dynamically with relationship between actual stimulus at a fovea and visual sensitivity at transient stage of adaptation. This report presents the procedures of dynamic evaluation method of threshold conditions and readability of printed matter in the uniform luminance field. The procedures express visual sensitivity and the effective luminance ratio in three diagrams which cover all interactions among six factors - size and figure of visual object, luminance contrast between object and background, field luminance, pre-adaptation luminance, raps time after the field luminance changed.