Olson J D, Tulunay-Keesey U, Saleh B E
Department of Electrical and Computer Engineering, University of Wisconsin, Madison 53706.
Vision Res. 1994 Nov;34(21):2907-15. doi: 10.1016/0042-6989(94)90059-0.
The addition of a uniform increment of luminance (L) to a faded retinally-stabilized target results in the subjective reappearance of the image with contrast opposite to that of the target. This phenomenon, called apparent phase reversal (APR), reveals a nonlinear gain mechanism in the adaptation process. The magnitude of the threshold increment to elicit APR (Lapr) is a measure of the state of stabilized adaptation. In the experiments reported here, Lapr was studied as a function of background luminance (Lo) and contrast (m) of the adapting stimulus. It was found that Lapr increases with increasing Lo, but does not depend on m. The data are analyzed within the context of a previously proposed model of stabilized image fading consisting of a multiplicative inverse gain followed by a subtractive process. It was found that the addition of a contrast processing stage was required to account for the relationship between Lapr and m.
在一个逐渐褪色的视网膜稳定目标上增加均匀的亮度增量（L），会导致图像主观上以与目标对比度相反的形式重新出现。这种现象称为表观相位反转（APR），揭示了适应过程中的非线性增益机制。引发APR的阈值增量（Lapr）的大小是稳定适应状态的一种度量。在此处报告的实验中，研究了Lapr作为适应刺激的背景亮度（Lo）和对比度（m）的函数。发现Lapr随Lo的增加而增加，但不依赖于m。在先前提出的由乘法逆增益后跟减法过程组成的稳定图像褪色模型的背景下对数据进行了分析。发现需要增加一个对比度处理阶段来解释Lapr与m之间的关系。
