이화여자대학교

초록/요약

Seurat's pointillism is a technique that enables the mixing of colors through the audience's perspective by juxtaposing "small and clear" colored points on the canvas without directly mixing the pigment in the palette. This employs the principle of optical mixing in place of physical mixing, with each point exhibiting an independent color. However, when viewed from a distance, the points coalesce to form a new color. This study sought to elucidate the principle of optical color mixing by focusing on the fundamental attributes of colors. To this end, an investigation was conducted to ascertain the correlation between value and optical color mixing. To achieve this, an experiment was designed to evaluate the difference in visual value of a single color that was physically identical to a color in which the two value stages were uniformly mixed in a tiled shape. The experimental stimulation comprised a solid color stimulation serving as a reference and a tiled color stimulation, wherein the two value levels were uniformly mixed in a tiled of the same area ratio for optical mixing. All color stimuli were presented with a neutral saturation value. Furthermore, in accordance with the objective of the study, which was to analyze the pattern of optical mixing due to the density of color(value) mixture and the difference in value between tiled particles, the stimulus with a 10° x 10° field of view was divided into a density range of 10x10 to 70x70, and the value difference (ΔL*) between tiled particles was divided into 20 and 40 stages. It was thus determined that the averaged color value of the solid and tiled colors of all stimulation pairs was identical, but they were perceived as different. Firstly, when the gap was small (ΔL*=20), when the stimulation density was low, the tiled stimulus was evaluated as darker than the solid color, and when the stimulation density was high, the tiled stimulus was evaluated as brighter than the solid color. Conversely, when the value gap between tiled particles was considerable (ΔL*=40), the mean value of the color mixture was assessed to be higher in the majority of mean value stages, with the exception of the mean value stage with a low density of stimulation, where the opposite was observed. The study revealed that the average value of the solid and tiled(mixed) colors of all stimulation pairs was identical, yet they were perceived as distinct colors. Furthermore, there was a tendency for subjects to perceive the colors as either brighter or darker, contingent on the density and value differences.