Abstract

AbstractThe visual transmission of information consists of luminance information and chrominance information, which basically are dependent on each other. However, a new visual phenomenon in which chrominance information is controlled by luminance information has been found. It is described as follows.(1) When a stationary luminance noise pattern is superposed on a chrominance spatial sinusoidal pattern (yellow‐blue), the chrominance sinusoidal pattern is deformed. As a result, the light portion appears as yellow and the dark portion as blue. This phenomenon occurs at 2 ± 3 cpd of the luminance noise frequency.(2) A small‐field achromatic sine‐wave pattern enclosed by a yellow‐blue chrominance sine‐wave is perceived as yellowish in the white portion of the achromatic sine‐wave pattern, and as bluish in the black portion (4±6 cpd of the spatial frequency). These phenomena can be explained by lack of or no working of blue cones at the retinal fovea and the influence of the surrounding color on the appearance of color at the fovea.Acknowledgement. Several helpful discussions on this study with each member of the visual psychology group at NHK Broadcasting Science Research Laboratories are gratefully acknowledged. The author also would like to thank Miss Y. Okada and Miss Y. Yamaoka for the evaluation experiments.

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