Visibility Modeling using Weber-Fechner's Law

Abstract

In this study, at the first, the visibility of achromatic web safe color combinations between foregrounds and backgrounds was examined by utilizing psychophysical methodology, a paired comparison experiment. Twenty students (3 females and 17 males) ages 19 to 26 years (average 23.4) were recruited ; they were all with normal color sensation. The subject looked at the two different color rings simultaneously and was instructed to identify which of the two rings enable it to see more clearly. Five achromatic web safe colors were employed for visual stimuli of which components were two rings and a background. Secondly, Thurston's paired comparisons technique provided each stimulus with the subjects' relative visibility ranking. Furthermore, the subject's visual sensation was deduced by applying Weber-Fechner's law to luminance of stimuli. As a result, the rankings of stimuli bore the monotone relationship to the visual sensation. This indicates that the rating visibility of color combinations is possible by applying Weber-Fechner's law to the luminance of both the ring and the background.