Neural mechanisms of rapid natural scene categorization in human visual cortex.
Neural mechanisms of rapid natural scene categorization in human visual cortex.
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DOI：
10.1038/nature08103
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发表时间：
2009-07-02
期刊：
影响因子：
64.8
通讯作者：
Kastner, Sabine
中科院分区：
文献类型：
--
作者：
Peelen, Marius V.;Fei-Fei, Li;Kastner, Sabine
视觉系统具有从复杂的自然场景中提取分类信息的非凡能力。例如，受试者能够在非常简短地呈现的新场景中快速检测诸如动物或车辆之类的对象类别的存在。当受试者不注意场景，同时执行一项不相关的注意力要求的任务时，情况也是如此，这与大多数视觉注意理论预测的能力限制形成了鲜明对比。在这里，我们使用功能磁共振成像和物体分类任务，在这个任务中，受试者在短暂呈现的自然场景中检测到人或车的存在，为视觉皮层中快速的自然场景分类提供神经基础。即使在与任务无关的、呈现在空间注意焦点之外的场景中，由自然场景诱发的对象选择性皮质中的神经活动模式也包含关于目标类别的信息。这些发现表明，在自然场景中对类别信息的快速检测是通过对象选择性皮层中的类别特定的偏向机制来调节的，该机制在整个视野中并行地运行，并且偏向于有利于属于目标对象类别的对象的信息处理。
The visual system has an extraordinary capability to extract categorical information from complex natural scenes. For example, subjects are able to rapidly detect the presence of object categories such as animals or vehicles in novel scenes that are presented very briefly. This is even true when subjects do not pay attention to the scenes and simultaneously perform an unrelated attentionally demanding task, a stark contrast to the capacity limitations predicted by most theories of visual attention. Here, we use functional magnetic resonance imaging and an object categorization task, in which subjects detected the presence of people or cars in briefly presented natural scenes, to provide a neural basis for rapid natural scene categorization in visual cortex. The pattern of neural activity in object-selective cortex evoked by the natural scenes contained information regarding the target category, even in scenes that were task-irrelevant and presented outside the focus of spatial attention. These findings suggest that the rapid detection of categorical information in natural scenes is mediated through a category-specific biasing mechanism in object-selective cortex that operates in parallel across the visual field and biases information processing in favour of objects belonging to the target object category.
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影响因子：
2.6
作者：
TREISMAN, AM;GELADE, G
通讯作者：
GELADE, G
影响因子：
25
作者：
Rousselet, GA;Fabre-Thorpe, M;Thorpe, SJ
通讯作者：
Thorpe, SJ
影响因子：
25
作者：
Saenz, M;Buracas, GT;Boynton, GM
通讯作者：
Boynton, GM
影响因子：
56.9
作者：
POTTER, MC
通讯作者：
POTTER, MC
DOI：
10.1073/pnas.092277599
发表时间：
2002-07-09
影响因子：
11.1
作者：
Li, FF;VanRullen, R;Perona, P
通讯作者：
Perona, P