HIGHER ORDER MECHANISMS IN COLOR VISION

色觉中的高阶机制

• 批准号: 2882879
• 负责人: JOHN KRAUSKOPF
• 金额: $ 24.59万
• 依托单位: NEW YORK UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 1986
• 资助国家: 美国
• 起止时间: 1986-09-01 至 2002-02-28
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/2882879
• 关键词: Macaca; color blindness; color visions; cone cell; electrophysiology; eye accommodation; human subject; motion perception; neural information processing; psychometrics; psychophysics; single cell analysis; space perception; vision tests; visual feedback; visual pathways; visual perception; visual stimulus; visual threshold

The overall purpose of this continuing project is to understand the contributions of mechanisms at various levels of visual processing to color vision, with particular interest in higher level mechanisms, that is, those beyond the conventional second stage mechanisms. A central aspect of the work is the coordination of investigations in psychophysics done at New York University and electrophysiology done in a continuing collaboration with Prof. Peter Lennie at the University of Rochester. The main aims are: 1. To study color discrimination under conditions of constant adaptation over an extended range of chromaticities and luminances and in detail over theoretically important regions. 2. To further test the hypothesis that photon noise plays a role in determining the detectability of increments on backgrounds. 3. To advance knowledge about the relative number and distribution of cone receptors by measuring the color appearance of small monochromatic stimuli imaged with the aid of adaptive optics. 4. To determine whether there are privileged directions in color space along which observers more readily abstract color appearance. 5. To continue collaborative electrophysiological experiments relating to significant issues in color vision. 6. To attempt to resolve the conflict between estimates of the relative sensitivity of the L and M cones based on two lines of evidence.

这个持续项目的总体目的是了解 视觉处理各个层次的机制对 色觉，特别是对更高层次的机制感兴趣， 也就是说，那些超出传统第二阶段机制的。 一个中央 工作的一个方面是协调调查 心理物理学在纽约大学完成，电生理学在 与英国大学 Peter Lennie 教授的持续合作 罗切斯特。 主要目标是： 1. 研究颜色歧视 在很长的范围内不断适应的条件 色度和亮度以及理论上重要的细节 地区。 2. 进一步检验光子噪声发挥作用的假设 在确定背景增量的可检测性方面的作用。 3. 加深对圆锥体相对数量和分布的了解 通过测量小单色的颜色外观来接收受体 借助自适应光学器件对刺激进行成像。 4. 确定 色彩空间中是否存在优先方向 观察者更容易抽象颜色外观。 5. 继续 与显着性相关的协作电生理实验 色觉问题。 6. 尝试解决双方之间的冲突 L 和 M 视锥细胞的相对灵敏度估计基于两个 证据线。