初级视觉皮层中的情境影响作为视觉搜索中凸显和不对称的基础。
Contextual influences in V1 as a basis for pop out and asymmetry in visual search.
作者信息
Li Z
机构信息
Gatsby Computational Neuroscience Unit, University College London, 17 Queen Square, London WC1N 3AR, United Kingdom.
出版信息
Proc Natl Acad Sci U S A. 1999 Aug 31;96(18):10530-5. doi: 10.1073/pnas.96.18.10530.
Abstract
I use a model to show how simple, bottom-up, neural mechanisms in primary visual cortex can qualitatively explain the preattentive component of complex psychophysical phenomena of visual search for a target among distracters. Depending on the image features, the speed of search ranges from fast, when a target pops-out or is instantaneously detectable, to very slow, and it can be asymmetric with respect to switches between the target and distracter objects. It has been unclear which neural mechanisms or even cortical areas control the ease of search, and no physiological correlate has been found for search asymmetry. My model suggests that contextual influences in V1 play a significant role.
摘要
我使用一个模型来展示初级视觉皮层中简单的、自下而上的神经机制如何定性地解释在干扰物中视觉搜索目标这一复杂心理物理学现象的前注意成分。根据图像特征，搜索速度范围从快速（当目标弹出或可瞬间检测到时）到非常缓慢，并且在目标和干扰物对象之间切换时可能是不对称的。目前尚不清楚哪些神经机制甚至皮层区域控制着搜索的难易程度，并且尚未发现搜索不对称的生理相关性。我的模型表明，V1中的上下文影响起着重要作用。
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