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M Mitsuboshi

Publications and source records attributed to M Mitsuboshi.

5 recordsLinked to original sources
PubMed1987

Temporal integration in human vision and the opponent-color systems.

The present study demonstrated that the temporal integration time (t.i.t.) could be prolonged even if the background energy was increased, provided that the background consisted of the colors opponent to each other. This was found, more or less, irrespective of the test stimulus size. These results suggest that the t.i.t. is not determined solely at receptor sites in the visual system, but that the chromatically-opponent systems are heavily involved. Mechanisms based upon a two-sites adaptation with one detection pathway model were briefly discussed.

Adaptation, Ocular↗
PubMed1987

Color-opponent characteristics revealed in temporal integration time.

The critical durations for temporal integration at threshold were obtained for lights of various wavelengths, presented both against darkness and against achromatic or chromatic backgrounds of different luminances. The critical duration (tc) was defined by a point of intersection of the two lines with the slopes of zero and unity in a log I.t-t plot, fitted by means of an algorithm implemented by computer program. tc was short for the lights of middle wavelengths, longer for the lights at the ends of the spectrum, and became shorter as the background luminance increased. tc also depended on the background wavelength, generally showing color-opponent characteristics when the difference was taken between tc's for the chromatic background and those for the achromatic one. The results were interpreted as the manifestation of chromatically-opponent system activities in temporal integration.

Color Perception↗
PubMed1985

Two temporal phases, brightness-dependent and -independent, in the chromatic response elicited by a briefly-flashed monochromatic light: a preliminary report.

The strength of chromatic response elicited by a briefly-flashed monochromatic light, which varied in its exposure duration, was measured with the "transient cancellation method" in Experiment 1. It was found that the chromatic response of a test color depended on brightness of the test field, up to the exposures of 100-200 msec. But it began to decrease, independent of brightness of the field, at the longer durations. The above results were confirmed by Experiment 2, in which the perceived saturation of a colored light was estimated with the two alternative forced choice method. Those results were tentatively interpreted as indicating the two kinds of chromatic responses presumably originating at the different stages in the visual system. Some other psychophysical dada on color vision were briefly referred to in relation to the present results.

Color Perception↗