HIGHER ORDER MECHANISMS IN COLOR VISION

色觉中的高阶机制

• 批准号: 3263120
• 负责人: JOHN KRAUSKOPF
• 金额: $ 15.58万
• 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 1994-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/3263120
• 关键词: Macaca; color blindness; color visions; cone cell; eye accommodation; human subject; lateral geniculate body; magnetic field; neural information processing; psychometrics; psychophysics; single cell analysis; stimulus /response; vision tests; visual feedback; visual pathways; visual stimulus; visual threshold

The major goal of this proposal is the understanding of the nature of higher order color mechanisms. By higher order mechanisms are meant elements in the chain of visual lprocessing beyond the second stage mechanisms of most conventional models of vision. The existence of such mechanisms has been suggested by the detailed analysis of the selective desensitization resulting from the viewing of modulated fields, and by the relation between the discrimination and detection of pulse changes in color. Experiments on the variation in color discrimination over color space under condiitions of constant adaptation will be continued and extended. These experiments should lead to new standards with which to describe color discrimination in everyday life. Theoretical analysis of the factors that control the detectability and appearance of brief, small monochromatic lights is proposed. The results of this analysis should help in generating estimates of the distribution of the different classes of cone receptors. Experiments are proposed on the role of color in the detection of motion. These experiments should help in determining the stage at which signals from the separate ,second stage mechanisms interact. Experiments are planned on the influence of color on the ability to judge the crientation of lines. These experiments should provide information on the ability of chromatic mechanisms to process spatial information. Recording of the magnetic fields generated in response to chromatic and luminance Ipulses will be made. The goal of these experiments is to see whether this method will provide evidence to support the theory that information about the chromatic and achromatic aspects of stimuli are transmitted through separate neural systems. Continued collaboration in studies of the properties of single neurons in the monkey i,visual system is planned. Methods which have proved fruitful in the characterization of !units in the lateral geniculate will be applied to cortical systems in Vl, V2, and V4.

这项建议的主要目的是了解 更高级的颜色机制。高阶机制意味着 第二阶段之后的视觉加工链中的元素 大多数传统视觉模型的机制。存在这种 机制已建议通过详细分析的选择性 由于观察调制场而导致的脱敏， 脉象变化的辨别与检测之间的关系 颜色. 不同颜色空间条件下颜色分辨力变化的实验研究 不断适应的条件将继续和扩大。这些 实验应该导致新的标准来描述颜色 日常生活中的歧视。 对控制探测能力的因素进行了理论分析， 提出了短暂的、小的单色光的出现。的结果 这一分析应有助于估计 不同种类的视锥细胞感受器 实验提出的颜色在运动检测中的作用。 这些实验应该有助于确定信号 第二阶段机构相互作用。 实验计划的影响颜色的判断能力 线的符号。这些实验应提供以下信息： 色彩机制处理空间信息的能力。 记录响应于色度和色度产生的磁场， 将产生亮度Ipulse。这些实验的目的是 这种方法是否能提供证据来支持 关于刺激的彩色和非彩色方面的信息是 通过不同的神经系统传播 继续合作研究单个神经元的特性， 猴子i，视觉系统是计划好的。已证明卓有成效的方法 的特性！将应用外侧膝状体中的单位 到V1 V2和V4的皮层系统