Liu L, Schor C M
School of Optometry, University of California at Berkeley 94720, USA.
Vision Res. 1995 Sep;35(18):2559-67. doi: 10.1016/0042-6989(95)00009-o.
In a series of psychophysical experiments, observers compared the apparent contrast of a dichoptic stimulus (contrast edges of orthogonal orientations in the two eyes) and a monocular stimulus ( a pie pattern in one eye and a blank field in the other eye). When the contrast of the dichoptic stimulus was low (2-3%) the two orthogonal edges were perceived as a stable pie pattern and its apparent contrast matched with that of a monocular pie pattern whose contrast was twice the contrast of the dichoptic stimulus. The dichoptic contrast gain (monocular/dichoptic contrast ratio) decreased with increasing dichoptic contrast. Although the observers showed an inability to discriminate the apparent contrasts of the dichoptic and the monocular pie patterns, they were able to tell which stimulus was the dichoptic one in a forced choice paradigm. A binocular contrast preservation model was proposed for binocular combination of contrast signals from orthogonal orientation channels.
在一系列心理物理学实验中，观察者比较了双眼视刺激（两眼呈现正交方向的对比边缘）和单眼刺激（一只眼睛呈现扇形图案，另一只眼睛呈现空白视野）的表观对比度。当双眼视刺激的对比度较低（2%-3%）时，两条正交边缘被感知为一个稳定的扇形图案，其表观对比度与对比度为双眼视刺激两倍的单眼扇形图案的表观对比度相匹配。双眼视对比度增益（单眼/双眼视对比度比率）随着双眼视对比度的增加而降低。尽管观察者无法区分双眼视和单眼扇形图案的表观对比度，但在强制选择范式中，他们能够分辨出哪个刺激是双眼视刺激。针对来自正交方向通道的对比度信号的双眼组合，提出了一种双眼对比度保持模型。
