Enns J T, Rensink R A
Department of Psychology, University of British Columbia, Vancouver, Canada.
Science. 1990 Feb 9;247(4943):721-3. doi: 10.1126/science.2300824.
The task of visual search is to determine as rapidly as possible whether a target item is present or absent in a display. Rapidly detected items are thought to contain features that correspond to primitive elements in the human visual system. In previous theories, it has been assumed that visual search is based on simple two-dimensional features in the image. However, visual search also has access to another level of representation, one that describes properties in the corresponding three-dimensional scene. Among these properties are three dimensionality and the direction of lighting, but not viewing direction. These findings imply that the parallel processes of early vision are much more sophisticated than previously assumed.
视觉搜索的任务是尽快确定目标物品在一个展示中是否存在。被快速检测到的物品被认为包含与人类视觉系统中的原始元素相对应的特征。在以往的理论中，人们假定视觉搜索是基于图像中的简单二维特征。然而，视觉搜索还能够利用另一种表征层次，即描述相应三维场景中的属性的层次。这些属性包括三维性和光照方向，但不包括观察方向。这些发现意味着早期视觉的并行过程比以前所假定的要复杂得多。
