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

虽然看东西是我们大多数人每天都在做的事情，但实际上这是一项令人难以置信的复杂任务。这项研究试图弄清楚人类的视觉系统(眼睛和大脑)是如何完成这一任务的。特别是，它侧重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SF频谱将信息从视网膜中分离出来。SF可以被认为是一种量化视觉细节级别的方法，其中低SF值对应于对象的一般形状，而高SF值对应于较小的细节。这项研究解决的问题是：为什么大脑会以这种方式划分东西？

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?