DISCRIMINATION OF ORIENTATION-DEFINED TEXTURE EDGES
DISCRIMINATION OF ORIENTATION-DEFINED TEXTURE EDGES
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DOI：
10.1016/0042-6989(94)00302-3
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发表时间：
1995-10-01
期刊：
影响因子：
1.8
通讯作者：
LANDY, MS
中科院分区：
文献类型：
--
作者：
WOLFSON, SS;LANDY, MS
使用随机放置的定向线段组成的纹理来检查预先注意的纹理分离。纹理元素方向的差异产生虚幻的或方向定义的纹理边缘。受试者区分两种纹理，一种是直纹理边缘，一种是“波浪状”纹理边缘。在不同条件下，纹理元素的方向和纹理边缘的方向发生变化。虽然纹理边缘的方向差异（“纹理梯度”）是纹理偏析性能的重要决定因素，但它不是唯一的决定因素。几个实验的证据表明，神经效应也很重要。也就是说，当纹理元素该结果与包括基于特征和基于过滤器的模型的许多纹理分离模型不一致，一种可能的解释是，用于检测特定方向的纹理边缘的二阶通道给予相同方向的一阶输入通道更大的权重。
Preattentive texture segregation was examined using textures composed of randomly placed, oriented line segments, A difference in texture element orientation produced an illusory, or orientation-defined, texture edge. Subjects discriminated between two textures, one with a straight texture edge and one with a ''wavy'' texture edge. Across conditions the orientation of the texture elements and the orientation of the texture edge varied. Although the orientation difference across the texture edge (the ''texture gradient'') is an important determinant of texture segregation performance, it is not the only one. Evidence from several experiments suggests that configural effects are also important. That is, orientation-defined texture edges are strongest when the texture elements (on one side of the edge) are parallel to the edge, This result is not consistent with a number of texture segregation models including feature- and filter-based models, One possible explanation is that the second-order channel used to detect a texture edge of a particular orientation gives greater weight to first-order input channels of that same orientation.