Object co-occurrence serves as a contextual cue to guide and facilitate visual search in a natural viewing environment
Object co-occurrence serves as a contextual cue to guide and facilitate visual search in a natural viewing environment
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DOI：
10.1167/11.9.9
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发表时间：
2011-01-01
影响因子：
1.8
通讯作者：
Eckstein, Miguel P.
中科院分区：
文献类型：
--
作者：
Mack, Stephen C.;Eckstein, Miguel P.
有越来越多的证据表明，场景上下文可以引导和促进视觉搜索（如。例如，在一个实施例中，A. Torralba，A.奥利瓦，M. S. Castelhano，& J. M.亨德森，2006年）。以前的研究利用刺激的大小有限，一个固定的头部位置，和上下文定义的全球空间配置的场景。因此，它是未知的类似的效果是否推广到自然的观看环境和本地对象同现定义的上下文。在这里，与移动的眼动仪，我们研究了自然条件下的搜索性能的对象同现的影响。观察员在堆满日常用品的桌子上寻找低可见度的目标物体。目标要么位于更大，更明显的“线索”对象，他们经常共同出现在自然场景（预期条件）或其他地方的显示，周围不相关的对象（意外条件）。与非预期位置相比，预期位置的目标平均搜索时间更短。此外，上下文引导的眼球运动，因为更多的注视指向线索对象而不是其他非目标对象，特别是当线索与当前搜索目标上下文相关时。这些结果不能用图像显著性模型来解释。因此，我们的结论是，物体同现可以作为一个上下文线索，以促进搜索和引导眼睛运动在自然环境中。
There is accumulating evidence that scene context can guide and facilitate visual search (e. g., A. Torralba, A. Oliva, M. S. Castelhano, & J. M. Henderson, 2006). Previous studies utilized stimuli of restricted size, a fixed head position, and context defined by the global spatial configuration of the scene. Thus, it is unknown whether similar effects generalize to natural viewing environments and to context defined by local object co-occurrence. Here, with a mobile eye tracker, we investigated the effects of object co-occurrence on search performance under naturalistic conditions. Observers searched for low-visibility target objects on tables cluttered with everyday objects. Targets were either located adjacent to larger, more visible "cue" objects that they regularly co-occurred in natural scenes (expected condition) or elsewhere in the display, surrounded by unrelated objects (unexpected condition). Mean search times were shorter for targets at expected locations as compared to unexpected locations. Additionally, context guided eye movements, as more fixations were directed toward cue objects than other non-target objects, particularly when the cue was contextually relevant to the current search target. These results could not be accounted for by image saliency models. Thus, we conclude that object co-occurrence can serve as a contextual cue to facilitate search and guide eye movements in natural environments.