Abstract

We studied temporal processing of chromatic and luminance perturbations of a 600-nm field, measuring both modulation sensitivity (sinusoidal frequencies from 0.25 to 40 Hz) and pulse-detection thresholds (pulse durations from 5 to 2560 msec) for mean luminances of 0.9 to 900 Td and field sizes of 0.5° to 8°. Chromatic stimuli were produced by antiphase modulation of lights matched by heterochromatic flicker photometry. Both mean luminance and field size affected sensitivity, and the magnitude of field-size effects increased with mean luminance. We derived both luminance and chromatic impulse response functions for each set of experimental conditions, using the modulation-sensitivity data. At high mean luminances and large field sizes the chromatic impulse response functions are complex, suggesting contributions from both chromatic and luminance mechanisms. Pulse-detection data were fitted by a peak detector model based on these impulse response functions.

© 1987 Optical Society of America

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Corrections

William H. Swanson, Takehiro Ueno, Vivianne C. Smith, and Joel Pokorny, "Temporal modulation sensitivity and pulse-detection thresholds for chromatic and luminance perturbations: errata," J. Opt. Soc. Am. A 5, 1525-1525 (1988)
https://www.osapublishing.org/josaa/abstract.cfm?uri=josaa-5-9-1525

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