Classifying illusory contours by means of orientation discrimination.
Classifying illusory contours by means of orientation discrimination.
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通过方向辨别对虚幻轮廓进行分类。
DOI：
10.1152/jn.1996.75.2.523
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Li,W
中科院分区：
文献类型：
--
作者：
Westheimer,G;Li,W
1.测量了实线和断续线以及由各种配置的偏移邻接线定义的虚幻边界的方向歧视的阈值。2.由具有明显间隙或重叠的正交线定义的Illuminant轮廓即使对于非常短的曝光持续时间也表现出优异的方向辨别力，并且对图案运动和掩蔽是鲁棒的。性能几乎和真实的线路一样好。3.当轮廓由没有间隙或重叠的邻接线组成时，取向辨别几乎没有那么好，并且随着短曝光持续时间、目标运动和掩蔽而进一步恶化。4.在这种虚幻的边界中引入差异并不能改善对它的取向的歧视，因此，还不必援引诸如表面精心制作之类的概念。5.结果表明，存在一类错觉轮廓，其方向性是通过向初级视皮层的方向选择单位提供足够的刺激来辨别的。对于均匀的空间平均亮度的轮廓，方向歧视是由生成线的正交性帮助，这给了支持的概念，正交取向的终止神经元可以参与方向歧视。
1. Thresholds for discrimination of orientation were measured for solid and interrupted lines, and for illusory borders defined by offset abutting lines of a variety of configurations. 2. Illusory contours defined by orthogonal lines with a clear gap or overlap manifest excellent orientation discrimination even for very short exposure durations, and are robust to pattern motion and masking. The performance is almost as good as that for real lines. 3. When the contour is made up of abutting lines without gap or overlap, orientation discrimination is not nearly as good, and deteriorates further with short exposure duration, with target motion, and with masking. 4. The introduction of disparity in such illusory borders does not improve the discrimination of its orientation, so that concepts such as surface elaborations do not yet have to be invoked. 5. The results suggest that there is one class of illusory contour whose orientations can be discriminated by virtue of its delivering adequate stimuli to orientation-selective units in primary visual cortex. For contours with a uniform space-averaged luminance, the orientation discrimination is helped by the orthogonality of the generating lines, and this gives support to the concept that orthogonally oriented end-stopped neurons may participate in the orientation discrimination.