Kretz F, Scarabin F, Bourguignat E
J Opt Soc Am. 1979 Dec;69(12):1635-48. doi: 10.1364/josa.69.001635.
A two-dimensional spatially inhomogeneous model of the visual system is developed. It is based on the properties of cone spacing in the retina and on the hypothesis of uniform neural interactions (lateral inhibitions). Its quantitative predictions of the detection and discrimination (acuity) of various types of stimuli are studied. The model works well with local stimuli positioned at varied eccentricities as well as with extended stimuli (vertical cosine gratings windowed by two-dimensional windows), but a simple threshold detector was found to be insufficient to describe the increase of contrast sensitivity with the number of cycles of the cosine gratings at high frequencies. It is concluded that, even for one-dimensional stimuli, a two-dimensional approach is necessary and that other parameters such as imprecision of fixation, eye movements, and two-dimensional probability summation must be taken into account before resorting to more complex models.
开发了一种视觉系统的二维空间非均匀模型。它基于视网膜中视锥细胞间距的特性以及均匀神经相互作用（侧向抑制）的假设。研究了该模型对各种类型刺激的检测和辨别（敏锐度）的定量预测。该模型对于位于不同偏心度的局部刺激以及扩展刺激（由二维窗口加窗的垂直余弦光栅）都能很好地工作，但发现一个简单的阈值检测器不足以描述高频下余弦光栅周期数增加时对比度敏感度的提高。得出的结论是，即使对于一维刺激，二维方法也是必要的，并且在采用更复杂的模型之前，必须考虑其他参数，如注视不精确性、眼球运动和二维概率总和。
