Region- and edge-based configurational effects in texture segmentation
Region- and edge-based configurational effects in texture segmentation
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DOI：
10.1016/j.visres.2007.01.009
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发表时间：
2007-03-01
期刊：
影响因子：
1.8
通讯作者：
Casco, Clara
中科院分区：
文献类型：
--
作者：
Giora, Enrico;Casco, Clara
我们在纹理分割中发现了一种新的配置效应。除了边缘处的共线促进之外，这种效果还源于纹理区域内的上下文调制，即来自不邻接分段边缘的纹素。当满足两个条件时发现最大的促进作用：（i）沿边缘的元素与边缘平行且共线，（ii）纹理区域中的元素也与边缘共线但不平行。我们表明，当纹理区域中存在与边缘不同方向的组时，就会发生这种促进。我们建议两种可能的潜在机制：要么是基于区域的过程，链接共线等向元素并在方向变化时定位边缘，要么是调整方向差异而不是方向本身的二阶滤波器。 (c) 2007 Elsevier Ltd. 保留所有权利。
We have found a new configurational effect in texture segmentation. In addition to collinear facilitation at the edge, this effect results from contextual modulation within the texture-region, i.e. from texels not abutting the segmented edge. The largest facilitation was found when two conditions were fulfilled: (i) elements along the edge were parallel to the edge and collinear, (ii) elements in the texture-region were also collinear but non-parallel to the edge. We show that this facilitation occurs when there are groups of different orientation from the edge in the texture-region. We suggest two possible underlying mechanisms: either a region-based process that links collinear iso-oriented elements and locates the edge when the orientation changes, or else second-order filters tuned to orientation differences rather than orientation per se. (c) 2007 Elsevier Ltd. All rights reserved.