色彩対比における最適輝度条件と学習要因(<特集>情報科学)

概要

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Human color perception is investigated in this paper. The optimum condition of luminance contrast condition for effective color contrast is so controversial that different reports disagree and give either positive or negative conclusions. We re-examined the issue by the matching method for basic 6 colors. The stimuli for our experiments were designed to be highly difficult to get the contrast effects, so that naive subjects needed several minute observation to perceive the color contrast. Nevertheless, we confirmed the general theory, so called Kirschmann's third law, that is "the color contrast is maximum when the luminance contrast is minimum". We have found, however, the blue color failed to follow the law. We also confirmed that the magnitude of color contrasts for different colors differ significantly. Generally, color contrast changes while the subjects are observing the stimuli. The results mentioned above were obtained after the contrast effects were saturated. We have also found that naive subjects could not see the color contrast immediately when they observe our stimuli first time. This leads us to investigate the temporal adaptation process for color contrast. We asked the naive subjects to report their perception of color contrast time by time for several minutes. After one month, we repeated the same experiments so that the clear effects of the previous observations were confirmed.
東海大学の論文
2005-09-30