Ingling C R, Martinez-Uriegas E
Vision Res. 1983;23(12):1495-500. doi: 10.1016/0042-6989(83)90161-x.
Which visual channel detects high spatial frequencies during careful fixation? Color vision models based on psychophysical data contradict electrophysiological results. According to electrophysiology, the channel which mediates foveal acuity originates in the small, tonic color-opponent r-g units of the X-cell pathway. However, psychophysical models assign acuity to the V lambda channel because when acuity is used as a criterion for equating luminosity it is additive. In all opponent-color models the r-g channel is subadditive and hence is excluded from mediating acuity. We show that the r-g channel adds cone signals for high spatial frequencies and subtracts them for low, and conclude that the major achromatic channel for human foveal vision originates within the r-g color-opponent channel. Quantitative analysis makes explicit the interaction between the spatial and spectral variables for the simple-opponent cells which predominate in primate foveal vision.
在精确注视过程中，哪个视觉通道能检测到高空间频率？基于心理物理学数据的颜色视觉模型与电生理结果相互矛盾。根据电生理学，介导中央凹视力的通道起源于X细胞通路中较小的、持续性颜色拮抗的r - g单元。然而，心理物理学模型将视力归因于Vλ通道，因为当将视力用作亮度等同的标准时，它是可加性的。在所有对立颜色模型中，r - g通道是次可加性的，因此被排除在介导视力之外。我们表明，r - g通道对高空间频率相加锥体信号，对低空间频率相减锥体信号，并得出结论，人类中央凹视觉的主要消色差通道起源于r - g颜色拮抗通道。定量分析明确了在灵长类中央凹视觉中占主导地位的简单拮抗细胞的空间和光谱变量之间的相互作用。
