Abstract
Chromatic induction refers to changes of color that appear when a color is observed in the presence of other colors. Chromatic contrast and chromatic assimilation are included in chromatic induction. Two experiments were conducted to investigate the impact of spatial frequency, color, and width of interval on chromatic induction. S-cone pattern and L-cone patterns were used as stimuli. In experiment 1, the impact of spatial frequency was tested. In experiment 2, the effect of interval in the stimulus was tested. The results of experiments 1 and 2 showed that chromatic induction by assimilation appeared in all conditions. This result suggested that color of stimuli was not affected by chromatic induction. The results showed that chromatic induction was perceived to be stronger when spatial frequency was higher, but chromatic induction was weaker when the width of interval was extended. These results suggested that even if the spatial frequency of induction areas was higher, chromatic induction was decreased when intervals were widened. The results also suggested that chromatic assimilation appeared by a different mechanism from the color spreading mechanism.