对比度检测与辨别能力的比较。

A comparison of contrast detection and discrimination.

作者信息

Bradley A, Ohzawa I

出版信息

Vision Res. 1986;26(6):991-7. doi: 10.1016/0042-6989(86)90155-0.

Abstract

In order to complement previous studies of contrast detection, we have examined the effects of three stimulus variables (spatial frequency, retinal illuminance, retinal locus) and one visual disorder (amblyopia) on contrast discrimination. Although each factor has a profound effect on the detection of gratings on otherwise unpatterned displays, we find a similar dipper-shaped contrast discrimination function and similar supra-threshold Weber fractions for contrast under all these conditions.

摘要

为了补充先前关于对比度检测的研究，我们研究了三个刺激变量（空间频率、视网膜照度、视网膜位置）和一种视觉障碍（弱视）对对比度辨别力的影响。尽管每个因素对在其他无图案显示器上光栅的检测都有深远影响，但我们发现在所有这些条件下，对比度辨别函数呈类似的勺形，且对比度的阈上韦伯分数相似。