Abstract
Color constancy is an important feature of the human visual system. Our visual system adapts almost instantly to new illumination and we can perceive the color of objects in a new space correctly whatever color the illumination may be. This feature is not solely that of a commercially available camera. The difference between the human visual system and a camera raises a problem in our observation of pictures. We cannot see the exact color that a photographer intended to show us through a picture. Some color modification must be made to the picture to resolve this. In the present paper, the degree of modification was determined for various color combinations of illumination for taking a picture, FLL and observing the picture, FLo. An entire experiment was carried out in an actual room based on the belief that color appearance of objects is determined in relation to the recognized visual space of illumination (RVSI). A subject observed the color of a room lit by FLL and pictures of the room lit by various colors of FLL were taken. The pictures were displayed in another room lit by FLo and the subject chose the picture that gave him/her the same color impression as the room of FLL. In the case of picture slide, the color of the picture must be modified as if it were taken with the illumination inbetween the color of FLL and FLo. In the case of picture print, a similar modification was needed for reddish FLL and white FLO, but it was not needed for white FLL and reddish FLo.
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Ikeda, M., Hattori, Y. & Shinoda, H. Color Modification of Pictures Requiring Same Color Impression as Real Scene. OPT REV 9, 282–292 (2002). https://doi.org/10.1007/s10043-002-0282-y
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DOI: https://doi.org/10.1007/s10043-002-0282-y