Spatial & Temporal Interactions in Brightness Perception

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• 批准号: 6706984
• 负责人: Barbara Blakeslee
• 金额: $ 17.53万
• 依托单位: NORTH DAKOTA STATE UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-03-01 至 2007-02-28
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6706984
• 关键词: behavioral /social science research tag; brightness discrimination; clinical research; human subject; illusions; light emission; light intensity; psychophysics; space perception; visual fields; visual perception; visual stimulus

DESCRIPTION (provided by applicant): Brightness is a fundamental quality of human vision. The mission of the National Eye Institute, and that of the SAVP program in particular, include understanding normal visual processing. Investigation of the neural mechanisms underlying brightness perception will contribute to our understanding of visual processing in general. This knowledge lays the groundwork for therapeutic interventions for disordered vision. A central problem in the study of brightness perception is understanding how the visual system separates the reflectances of objects from their illumination. These two variables are confounded since their product determines the amount of light reaching the eye from a particular surface. When the visual system is successful at separating reflectance and illumination it is said to be displaying brightness (or lightness) constancy, and perception is veridical. Perceptual errors (i.e., constancy failures) are potentially informative regarding the mechanisms underlying brightness perception, and the study of brightness illusions has historically been and continues to be a productive topic of research. While a large number of intriguing brightness illusions have been introduced, a survey of the literature reveals that the number of proposed explanations for these illusions is itself cumbersome. In addition, although phenomenal brightness demonstrations are often used to support various theories or proposed mechanisms of brightness coding, very few quantitative data are actually available to support these claims. The goal of the authors' recent research efforts, as well as the currently proposed research, is to remedy these deficiencies by investigating and modeling the spatial and temporal interactions between different areas of the visual field through the quantitative study of brightness illusions. The authors plan to continue to collect quantitative psychophysical data on brightness effects that will enlarge the quantitative database and critically test competing theories of brightness perception. In addition, these data will inform the continued development of a mechanistic model of brightness perception, the ODOG model of Blakeslee & McCourt (1999). This relatively low-level multiscale spatial filtering model has been extremely successful in simplifying our understanding of the mechanisms underlying brightness perception and in accounting for a large number of brightness effects that have previously been ascribed to a variety of different mechanisms.

描述（由申请人提供）：亮度是人类视野的基本质量。国家眼科研究所的使命，尤其是SAVP计划的使命包括了解正常的视觉处理。对亮度感知潜在的神经机制的研究将有助于我们对视觉处理的理解。这些知识为视力障碍的治疗干预奠定了基础。亮度感知研究中的一个核心问题是了解视觉系统如何将物体的反射与它们的照明区分开。这两个变量被混淆，因为它们的产物决定了从特定表面到达眼睛的光量。当视觉系统成功地分离反射率和照明时，据说它显示出亮度（或轻度）的恒定性，而感知是真实的。 感知错误（即恒定失败）可能是关于亮度感知的机制的信息，并且对亮度幻觉的研究历史上一直是并继续是研究的有效话题。 尽管已经引入了许多有趣的亮度幻想，但文献调查表明，这些幻觉的拟议解释数量本身很麻烦。 此外，尽管出色的亮度演示通常用于支持亮度编码的各种理论或提出的机制，但实际上很少有定量数据可用于支持这些主张。作者最近的研究工作以及当前提出的研究的目的是通过研究和建模视野不同领域之间的空间和时间相互作用，通过对亮度幻觉的定量研究来解决这些缺陷。作者计划继续收集有关亮度效应的定量心理物理数据，这些数据将扩大定量数据库并进行严格检验亮度感知的竞争理论。 此外，这些数据将为Blakeslee＆McCourt的ODOG模型（1999）的ODOG模型（1999）的亮度感知模型的持续开发提供信息。这种相对较低的多尺度空间滤波模型在简化了我们对亮度感知潜在机制的理解以及考虑到以前已归因于多种不同机制的大量亮度效应方面非常成功。