MECHANISMS OF COLOR DETECTION, INDUCTION AND ADAPTATION

本项目的目的是研究适应机制和更高水平 视觉系统中的相互作用， 人类色觉的早期机制 实验和 理论工作分为五个不同的类别： (1)对手颜色信号之间的相互作用随着时间的推移而变化。 对相关刺激的适应 联想的动态模型 适应将基于测量的实验结果， 相互作用的大小和变化率作为程度的函数 相关的刺激。 (2)两个对立颜色系统的自适应行为可以是 根据对手前后的静态和适应性来解释 机制等 这些机制的位置和时间特性 将通过沿沿着理论上定义的线条操纵颜色来研究 比以前研究的强度更高。 (3)视觉系统包括发出方向信号的机制， 颜色的变化。 颜色对之间的辨别阈值 在多个不同的波长处围绕等亮度色环的调制 率将被用来研究的方式，颜色和时间 信号被合并。 (4)测试颜色的外观受周围颜色的影响。 实验研究了圆对称和 切向变化的正弦环绕将用于建立模型 颜色机制中的横向相互作用。 这种模式的 结合加权空间积分、时间滞后和空间 非线性相互作用 (5)在视觉记忆中，颜色信息比亮度信息更有用 信息. 实验将确定信息的类型， 记住最好的每种颜色的机制和因素，可以干扰 存储这些信息。 预计在本项目中确定的视觉机制， 心理物理学实验将提供深入了解神经功能 和电生理学研究指南。

The aim of this project is to study adaptive mechanisms and higher level interactions in the visual system by building on established knowledge about the early mechanisms of human color vision. Experimental and theoretical work is proposed in five different categories: (1) The interaction between opponent color signal changes as an adaptation to correlated stimulation. A dynamic model of associative adaptation will be based on the results of experiments that measure the magnitude and rate of change in interactions as a function of the degree of correlated stimulation. (2) The adaptive behavior of the two opponent color systems can be explained in terms of pre- and post-opponent static and adaptive mechanisms. The location and temporal properties of these mechanisms will be studied by manipulating colors along theoretically defined lines at higher intensities than studied previously. (3) The visual system includes mechanisms that signal the direction of change in colors. Discrimination thresholds between pairs of color modulations around an equiluminant color circle at a number of different rates will be used to study the manner in which color and temporal signals are combined. (4) The appearance of test colors is influenced by surrounding colors. Experiments on the induced effect of circularly symmetric and tangentially varying sinusoidal surrounds will be used to build a model of the lateral interactions within color mechanisms. This model will incorporate weighted spatial integration, time-lags, and spatially nonlinear interactions. (5) In visual memory, chromatic information is more useful than luminance information. Experiments will identify the type of information that is remembered best by each color mechanism and factors that can interfere with the storage of this information. It is expected that the visual mechanisms identified in this project by psychophysical experiments will provide insights into neural functions and a guide for electrophysiological studies.