[OPTICAL REVIEW Vol. 7, No. 4 (2000) 358-363]

Color Property of the Recognized Visual Space of Illumination Controlled by Interior Color as the Initial Visual Information

Yoko MIZOKAMI, Mitsuo IKEDA and Hiroyuki SHINODA

Department of Photonics, Faculty of Science and Engineering, Ritsumeikan University, 1-1-1, Nojihigashi, Kusatsu, Shiga, 525-8577 Japan

(Received February 12, 2000; Accepted May 11, 2000)

It was shown that the color property of the recognized visual space of illumination, RVSI was controlled by changing the initial visual information by arranging objects in the room all shifting toward orange direction. We constructed two miniature rooms, D and I, both illuminated by the same daylight type fluorescent lamps but arranged with furniture of different color, those in room I shifting toward color as if they were illuminated by an incandescent lamp. Subjects felt as if room I were illuminated by an incandescent lamp. A test patch was placed midair in each room and its color was judged. When the test patches were placed in room I their colors were all perceived to be shifted toward greenish blue compared to those of test patches placed in room D, in spite of having the same illumination. The results imply that the apparent color of an object is determined not by its chromaticity, but in relation to the color property of the RVSI of the room where the object is observed.

Key words : color, color appearance, color constancy, interior, illumination, recognized visual space of illumination, simultaneous color contrast