正対比文字で構成された文章に対する読みやすさ評価関数

概要

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In this paper, we propose Visibility Index Functions (VIFs), that enable evaluating and predicting the legibility of sentences quantitatively and conveniently. In light of nonlinearity attached to suprathreshold phenomena, we analyzed the data of the series of legibility evaluation experiments of Sato and Hara(l999), and constructed two formulations '・ VIF_<VL>(VL, A) and VIF_<△L>,(△L,L_b,A), as functions of Visibility Level VL, luminance difference △L [cd/m^2] between a visual target and its background, background luminance L_b[cd/m^2] and character size A [min]. We showed that both the VIFs can well describe both the experimental results of Sato and Hara and the legibility data derived by Inoue and Akizuki (1997) with no parameter change except low luminance conditions for background.
社団法人照明学会の論文
2004-10-25