Abramov I, Gordon J, Chan H
Department of Psychology, Brooklyn College, City University of New York 11210.
J Opt Soc Am A. 1991 Feb;8(2):404-14. doi: 10.1364/josaa.8.000404.
Hue and saturation scaling were used to measure the appearance of spectral lights as a function of stimulus size for nine loci across the horizontal retinal meridian. At a given locus, each hue (R, Y, G, and B) grew as a function of stimulus size up to some asymptotic value. The parameter values of Michaelis-Menten growth functions fitted to the hue data were used to derive the sizes of the so-called perceptive fields of the hue mechanisms. The fields for all mechanisms increased with eccentricity, and this increase was greater on the temporal than on the nasal retina. By increasing stimulus size it was possible to achieve fovealike color vision to eccentricities of 20 deg. However, even the largest stimuli failed to produce fully saturated hues at 40 deg. The retinal size scales of the four hue mechanisms were not the same; those for R and B were similar, and these mechanisms had the smallest perceptive fields everywhere. The perceptive fields of the hue mechanisms at all loci were larger than anatomical estimates of the sizes of retinal receptive fields.
通过色调和饱和度缩放来测量九个横跨水平视网膜子午线位点的光谱光外观，作为刺激大小的函数。在给定位点，每种色调（红、黄、绿和蓝）随刺激大小增加，直至达到某个渐近值。将米氏生长函数拟合到色调数据的参数值用于推导色调机制所谓的感受野大小。所有机制的感受野随偏心率增加，且这种增加在颞侧视网膜比鼻侧视网膜更大。通过增加刺激大小，有可能在20度偏心率处实现类似中央凹的色觉。然而，即使是最大的刺激在40度时也未能产生完全饱和的色调。四种色调机制的视网膜大小尺度不同；红色和蓝色的相似，且这些机制在各处的感受野最小。所有位点的色调机制感受野都大于视网膜感受野大小的解剖学估计值。
