Chanprapha PHUANGSUWAN^*, Mitsuo IKEDA, and Pichayada KATEMAKE

Department of Imaging and Printing Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand

(Received June 3, 2012; Accepted November 22, 2012)

According to the recognized visual space of illumination concept, space perception is essential for color constancy. It should be possible to experience the color constancy in a picture if we perceive a three-dimensional space in the picture. A dimension-up (D-up) viewer was constructed to perceive a space for a picture. An experimental room illuminated by various color lights was used as the reference scene and the subject determined a picture in which the color impression was matched to that of the room by selecting from 13 different colored pictures of the room. The picture with the color nearest to the color of the room was selected with the D-up viewer implying the existence of color constancy in the picture. When subjects observed a picture in a normal way the picture of the room illuminated in white was selected regardless of the actual room illumination color, confirming no color constancy in the picture.

Key words: color constancy, color appearance; photograph, 2D and 3D, space perception, illumination color, recognized space of illumination

^*Present address: Color Research Center, Faculty of Mass Communication Technology, Rajamangala University of Technology Thanyaburi, 12110 Thailand. E-mail address: karamennn@gmail.com