Color property of the recognized visual space of illumination controlled by interior color as the initial visual information

It was shown that the color property of the recognized visual space of illu mination, RVSI was controlled by changing the initial visual information by arranging objects in the room all shifting toward orange direction. We con structed two miniature rooms, D and I, both illuminated by the same dayligh t type fluorescent lamps but arranged with furniture of different color, th ose in room I shifting toward color as if they were illuminated by an incan descent lamp. Subjects felt as ii room I were illuminated by an incandescen t lamp. A test patch was placed midair in each room and its color was judge d. When the test patches were placed in room I their colors were all percei ved to be shifted toward greenish blue compared to those of test patches pl aced 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 o bject is observed.