Abstract
In order to study whether it is possible to express color images instrumentally, a color image scale for the determination of a chromaticity point by colorimetry was considered. The color image scale was divided into several color image regions by assigning the chromaticity point of each color chart to the color image of a color chart, on the color image scale. The chromaticity point and the color image can effectively be determined using the relationship between the chromaticity point and the color image in the color image scale.
