Shevell S K, Holliday I, Whittle P
Department of Psychology, University of Chicago, IL 60637.
Vision Res. 1992 Dec;32(12):2331-40. doi: 10.1016/0042-6989(92)90096-2.
A particular rate of quantal absorption by photoreceptors may result in a dim or an intense percept, depending on light stimulating other parts of the retina. The brightness of an object in a natural scene, therefore, depends on the amount of light reflected from the object in comparison to light from other parts of the scene. We show this phenomenon is mediated by two separate neural mechanisms at distinct levels of the visual system. The first mechanism depends on retinal image contrast between adjacent regions. The second mechanism depends on the binocularly fused "cyclopian" representation and is influenced by more remote, noncontiguous areas of the visual field.
光感受器特定的量子吸收速率可能会导致昏暗或强烈的感知，这取决于刺激视网膜其他部位的光。因此，自然场景中物体的亮度取决于该物体反射的光量与场景其他部位的光量之比。我们表明，这种现象是由视觉系统不同层面上两种独立的神经机制介导的。第一种机制取决于相邻区域之间的视网膜图像对比度。第二种机制取决于双眼融合的“独眼巨人”表征，并受视野中更远、不相邻区域的影响。
