抄録
The present study considers a fuzzy color system in which three membership functions are constructed on the color triangle. This system can process a fuzzy input (as the membership values of subjects) to an RGB system and output the center of gravity of three weights associated with respective grades. Three input fuzzy sets (red, green, and blue) are applied to the color triangle relationship. By treating three attributes of redness, greenness, and blueness on the color triangle, an average color value can be easily obtained as the center of gravity of the fuzzy output. The subjects are required to determine whether the impressive word (or the color word) for each color is suitable. The response of subjects can be obtained as fuzzy sets (as the membership values of subjects) on the color triangle. The responses for impressive words (stimulus, appetite, concentration, relaxation, calmness, rest, and mild) and the responses for color words (red, orange, yellow, green, blue, purple, and pink) show mountain-like shape. The height of fuzzy set indicates possibility of a target color or degree of cognition for a target color and the expanse of fuzzy set shows vagueness, the fuzzy sets for a impressive word (e.g. stimulus) and for a color word (e.g. red) are compared with calculating an intersection of those fuzzy sets. The fuzzy sets for impressive words show large vagueness and small possibility rather than those for color words. The differences between impressive fuzzy sets and color fuzzy sets are described, and the relationship between the centers of gravity of fuzzy inputs and inference outputs for fuzzy inputs are shown in the present paper.
