初期視覚情報の増大による照明認識視空間の形成過程

抄録

One can immediately grasp the illumination conditions of a room and correctly judge the colors of various objects in it by looking around the interior when one entering the room. This is because one establishes a fully recognized visual space of illumination for the room by using the illuminated objects as the initial visual information about the room. If one is provided only with incomplete initial visual information, however, the recognized visual space of illumination is also incomplete and one cannot see the correct colors of objects. In the present experiment we controlled the amount of initial visual information by the size of the window through which subjects saw a room illuminated by a type A light source from a room illuminated by a type A light source. We investigated the formation of the recognized visual space of illumination by judging the colors of colored stimuli. The colors gradually shifted from those of light reflected from the objects to those of the objects themselves indicating a gradual formation of the recognized visual space of illumination with increasing amount of initial visual information. However, some colors showed no color shift in spite of the increasing window size. An explanation of the color shift mechanism is presented.