The differential chromaticity thresholds of three color stimuli have been determined from metameric matches carried out during the cone-plateau period after photopigment bleaching. The results are compared with some recently published ones [ HitaE. Jiménez del BarcoL. RomeroJ., J. Opt. Soc. Am. A 3, 1203 ( 1986)] obtained under similar experimental conditions but without prior photopigment bleaching. The possible effects of rod intrusion on color-prediction discrepancies are discussed in the light of both sets of results. Under our experimental conditions, with foveal fields of 3 deg, luminance within the low photopic level, and sets of primary colors produced by filters of differing spectral bandwidth, the rod intrusion effect can be ruled out as a possible cause of color-prediction discrepancies, although it does appear to produce variations in the sizes of the discrimination ellipses and in their orientation.
© 1988 Optical Society of America
Original Manuscript: February 25, 1987
Manuscript Accepted: October 28, 1987
Published: March 1, 1988
L. Jiménez del Barco, E. Hita, J. Romero, and J. Vida, "Color-prediction discrepancies and differential chromaticity thresholds with photopigment bleaching," J. Opt. Soc. Am. A 5, 432-437 (1988)