Contour integration across spatial frequency.
Contour integration across spatial frequency.
复制标题
跨空间频率的轮廓积分
DOI：
10.1037/a0016473
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Meinhardt
中科院分区：
文献类型：
--
作者：
Persike;L. A. ;Meinhardt
轮廓整合的关联场模型表明，局部带通元素在空间频率的有限波段内被空间分组为全局轮廓（field, Hayes, & Hess, 1993）。虽然局部方向和间距变化的结果支持自动对焦模型，但空间频率（SF）的影响很少得到解决。为了探索是否在SF上发生轮廓整合，我们研究了SF沿轮廓抖动的Gabor随机场和嵌入场中的人体轮廓检测。结果表明，当轮廓元间距为1.25倍频时，对轮廓检测无损害。即使是2.25个八度的顺音间隔，也只有中等程度的损伤。由于测量相邻单个带通元件的上下文相互作用的顺势调谐函数表明带宽要小得多（Polat & Sagi, 1993），结果表明轮廓集成不能仅仅依赖于相邻方向和顺势调谐机制之间的局部锁定。最近发现，跨空间频率、跨颜色和深度的鲁棒性表明，基于局部方向的分组集成了其他基本特征。这表明它起源于不太远的大脑区域。（PsycINFO数据库记录(c) 2016 APA，版权所有）
Association field models of contour integration suggest that local band-pass elements are spatially grouped to global contours within limited bands of spatial frequency (Field, Hayes, & Hess, 1993). While results for local orientation and spacing variation render support for AF models, effects of spatial frequency (SF) have rarely been addressed. To explore whether contour integration occurs across SF, we studied human contour detection in Gabor random fields with SF jitter along the contour, and in the embedding field. Results show no impairment of contour detection when the contour elements are 1.25 octaves apart. Even with a SF separation of 2.25 octaves there is only moderate impairment. Because SF tuning functions measured for contextual interactions of neighbored single band-pass elements indicate much smaller bandwidths (Polat & Sagi, 1993), the results imply that contour integration cannot rest solely on local locking among neighbored orientation and SF tuned mechanisms. Robustness across spatial frequency, and across color and depth, as found recently, indicates that local orientation based grouping integrates across other basic features. This suggests an origin in not too distal brain regions.(PsycINFO Database Record (c) 2016 APA, all rights reserved)