Suprathreshold contrast response in normal and anomalous trichromats
Suprathreshold contrast response in normal and anomalous trichromats
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DOI：
10.1364/josaa.380088
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发表时间：
2020-04-01
影响因子：
1.9
通讯作者：
Werner, John S.
中科院分区：
文献类型：
--
作者：
Knoblauch, Kenneth;Marsh-Armstrong, Brennan;Werner, John S.
最大似然差异标度被用来测量阈上对比度响应差异尺度低频Gabor模式，调制沿着亮度和L-M颜色方向在正常，protanomalous，和deuteranomalous观察员。基于信号检测模型，通过最大似然估计感知尺度值，参数化为d '。通过Michaelis-Menten模型很好地拟合差异量表，允许估计每个受试者的响应和对比度增益参数。异常观察者的反应或对比度增益与正常观察者的亮度对比度没有显着差异。然而，对于色调制，异常观察者显示出更高的对比度和更低的响应增益相比，正常观察者。这些效应不能用简单的色素移位模型来解释，它们支持一种补偿机制，以优化输入对比度范围到神经响应范围的映射。反应和对比度增益之间的线性关系表明它们之间的神经权衡。(C)2020美国光学学会
Maximum likelihood difference scaling was used to measure suprathreshold contrast response difference scales for low-frequency Gabor patterns, modulated along luminance and L-M color directions in normal, protanomalous, and deuteranomalous observers. Based on a signal-detection model, perceptual scale values, parameterized as d', were estimated by maximum likelihood. The difference scales were well fit by a Michaelis-Menten model, permitting estimates of response and contrast gain parameters for each subject. Anomalous observers showed no significant differences in response or contrast gain from normal observers for luminance contrast. For chromatic modulation, however, anomalous observers displayed higher contrast and lower response gain compared to normal observers. These effects cannot be explained by simple pigment shift models, and they support a compensation mechanism to optimize the mapping of the input contrast range to the neural response range. A linear relation between response and contrast gain suggests a neural trade-off between them. (C) 2020 Optical Society of America