2018 年 42 巻 3+ 号 p. 57-
This is an experiment on the simultaneous color contrast done by two techniques. In both cases the quantal catch was made equal at the central retina of 13°×10°. In one technique a small gray patch was placed on a colored paper, while in the other technique the same area was stimulated by the same color as for the paper technique but by illumination in a room. The color appearance of the central patch was measured by the elementary color naming. With the illumination very vivid color was perceived at the patch, while it was almost no color in the paper condition. The results showed the chromatic adaptation to take place to the illumination and not to the color of object.
