RPG: Lateral Interactions in Brightness, Contrast and Color Perception

9306776布莱克斯利大多数视觉感知实验都与视觉阈值有关，也就是说，测量最弱的刺激，例如人类观察者几乎看不见的一点光的强度。然而，大多数所谓的“看”与神经对刺激的处理相对应，而刺激的强度要比阈值强得多。这种刺激被称为阈值上刺激。如果要实现对视觉知觉的全面科学理解，那么研究视觉系统对这些阈值以上刺激的反应是必不可少的。在可以研究的许多类型的知觉经验中(例如，刺激运动、立体深度、纹理等)，妇女研究规划补助金的目标是增加对阈值以上亮度、对比度和颜色知觉的理解。虽然刺激的阈值相对不受周围刺激的影响，但大多数视觉错觉是基于这样一个事实，即阈值上的知觉受到周围视觉环境的强烈影响。实验的具体目的是研究刺激的亮度、对比度和颜色的感知如何依赖于周围的刺激(即，周围的大小和/或形状、亮度和/或对比度，以及颜色)。***

9306776 Blakeslee The majority of experiments on visual perception have been concerned with visual thresholds, that is, with measuring the weakest stimulus, for example the intesity of a spot of light, which is just barely visible to human observers. Most of what is called "seeing", however, corresponds to the neural processing of stimuli which are very much stronger than threshold. Such stimuli are referred to as suprathreshold. If a comprehensive scientific understanding of visual perception is to be achieved, then the study of the response of the visual system to these suprathreshold stimuli is essential. Of the many types of perceptual experiences which might be studied (e.g., those of stimulus motion, stereoscopic depth, texture, etc.), the goal of the research planning grant for women is to increase understanding of suprathreshold brightness, contrast and color perception. Whereas the threshold for a stimulus is relatively unaffected by surrounding stimuli, most visual illusions are based upon the fact that suprathreshold perception is strongly influenced by the surrounding visual context. The specific purpose of the proposed experiments is to investigate how the perception of stimulus brightness, contrast and color depends upon surrounding stimuli (i.e., the size and/or shape, luminance and/or contrast, and color of the surround). ***