| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2000: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1999: ¥2,600,000 (Direct Cost: ¥2,600,000)
|
|---|
| Research Abstract |
Although the details of its measurement were unknown, the color zone map published in 1953 by the Optical Society of America has been referred in many textbooks for a long time as a typical color visual field. In order to establish a reliable color zone map, color appearance of red, green, yellow (yellow1 and yellow2), and blue stimuli was measured using a psychophysical methods. Hue and saturation judgments based on the opponent-colors theory, subjective blackness evaluation, and the categorical color naming technique were applied to measure color appearance of the stimuli presented in the sixty-five test points along the eight directions over the entire visual field. All the stimuli except the yellow2 were presented in equal luminance of about 27 cd/m^2 with 2 deg diameter circular field surrounded by a gray of about 39 cd/m^2. The luminance of the yellow2 was about 73 cd/m^2.
Unique hue component score, which is the product of the saturation value and percentage of one unique hue, was calculated for each of the test stimuli at all the retinal locations measured. For example, if saturation was 60% and the hue was a mixture of 90% red and 10% yellow, then the component score of unique red would be 54%. The color zone map represented by the equal contour lines of the unique hue component was obtained for each of the test stimuli. All the results showed the area extended toward the right and downward directions which is coincide with the OSA color zone map. Color zones of 50% unique hue component score for the red, blue and yellow2 were larger than those for green and yellow1. It was found that the categorical color area is roughly corresponds to the 50% color zone for the red, green, and blue stimuli.
|
