Illusory edges comingle with real edges in the neural representation of objects.
Illusory edges comingle with real edges in the neural representation of objects.
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DOI：
10.1016/j.visres.2018.01.006
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发表时间：
2018-03
期刊：
影响因子：
1.8
通讯作者：
Shevell SK
中科院分区：
文献类型：
--
作者：
Elliott SL;Shevell SK
视觉系统必须将来自光感受器的逐点生物表征转换为单独物体的神经表征。即使是一个均匀的圆形光斑，亮度缓慢调制，也可以通过引入黑线来勾勒出中心正方形，从而分割成单独的中心和周围区域。黑色线条在中心引起亮度感应，即使广场内外的光线总是相同的，正如广场中心区域及其周围区域之间的空间对抗所预测的那样。重要的是，形成正方形的虚幻Kanizsa线对于这种亮度感应与真实的黑线一样有效，这表明了一种“形式线索不变”的皮层神经表征，它不能区分由真实的或虚幻边缘所引起的中心区域。一个悬而未决的问题是，独立的子系统是否生成由真实的与虚幻的边缘定义的对象，每个边缘都提供对象的相同的形式线索不变神经表示，或者形式线索不变是否扩展到整合一起定义对象的组件。这里的实验表明，当一个正方形的子部分由真实的和虚幻的边缘的混合物定义时，对象分割。受试者调整迈克尔逊对比度的一个单独的补丁，以匹配感知调制深度内的中心区域的圆形领域，缓慢振荡的亮度。一个封闭的四边形图形，无论如何构造，都会降低中心区域内的感知调制深度。这表明，真实的和虚幻的子部分都可以被集成，以从周围分割中心。它支持形式线索不变性的一个强版本，其中负责对象分割的神经机制对集成以定义对象的零碎线索是公正的。
The visual system must transform a point-by-point biological representation from the photoreceptors into neural representations of separate objects. Even a uniform circular patch of light that slowly modulates in luminance can be segmented into separate central and surrounding areas merely by introducing black lines to outline a central square. The black lines cause brightness induction in the center even though the light inside and outside the square is always identical, as predicted by spatial antagonism between the square central area and its surround. Importantly, illusory Kanizsa lines forming the square are as effective for this brightness induction as real black lines, suggesting a ‘form-cue invariant’ cortical neural representation that does not distinguish between a central region set off by real or illusory edges. An open question is whether separate subsystems generate objects defined by real versus illusory edges, each providing the same form-cue invariant neural representation of an object, or whether form-cue invariance extends to integrating component pieces that together define an object. Experiments here show object segmentation when subparts of a square are defined by a mixture of real and illusory edges. Subjects adjusted the Michelson contrast of a separate patch to match the perceived modulation depth within the central region of a circular field that slowly oscillated in luminance. A closed, four-sided figure, no matter how constructed, reduced the perceived modulation depth within the central region. This shows that both real and illusory subparts can be integrated to segment center from surround. It supports a strong version of form-cue invariance in which neural mechanisms responsible for object segmentation are impartial to the piecemeal cues that are integrated to define an object.
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影响因子：
1.8
作者：
Feitosa-Santana C;D'Antona AD;Shevell SK
通讯作者：
Shevell SK
DOI：
10.3758/bf03207883
发表时间：
1988-05-01
期刊：
PERCEPTION & PSYCHOPHYSICS
影响因子：
--
作者：
WALKER, JT;SHANK, MD
通讯作者：
SHANK, MD
影响因子：
1.8
作者：
D'Antona, Anthony D.;Kremers, Jan;Shevell, Steven K.
通讯作者：
Shevell, Steven K.
影响因子：
56.9
作者：
VONDERHEYDT, R;PETERHANS, E;BAUMGARTNER, G
通讯作者：
BAUMGARTNER, G
DOI：
10.3758/bf03206951
发表时间：
1994-11-01
期刊：
PERCEPTION & PSYCHOPHYSICS
影响因子：
--
作者：
PETERSON, MA;GIBSON, BS
通讯作者：
GIBSON, BS