Psychophysical and electrophysiological measures of optimal spatial frequency bands in visual perception

视觉感知中最佳空间频带的心理物理学和电生理学测量

• 批准号: 288346-2009
• 负责人: Collin, Charles
• 金额: $ 1.46万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=427327
• 关键词: Psychophysical; electrophysiological; measures; optimal; spatial

Although seeing is something most of us do every day without obvious effort, it is in fact an incredibly complex task. This research is an attempt to figure out how the human visual system (the eyes and brain) accomplishes this task. In particular, it focuses on an interesting "divide and conquer" strategy that the brain uses, called Spatial Frequency (SF) analysis. We have known for some time now that the brain divides information from the retinas according to its SF spectum. SF can be thought of as a way of quantifying levels of visual detail, where low SFs correspond to general shapes of objects and high SFs correspond to smaller details. The question this research addresses is this: Why does the brain divide things up this way?

虽然看是我们大多数人每天做的事情，没有明显的努力，但它实际上是一项非常复杂的任务。这项研究试图弄清楚人类视觉系统（眼睛和大脑）是如何完成这项任务的。特别是，它专注于大脑使用的一种有趣的“分而治之”策略，称为空间频率（SF）分析。我们已经知道一段时间了，大脑根据它的SF光谱来划分视网膜的信息。 SF可以被认为是量化视觉细节水平的一种方式，其中低SF对应于对象的一般形状，而高SF对应于较小的细节。这项研究要解决的问题是：为什么大脑会这样划分事物？