ASYMMETRIES IN ORIENTED-LINE DETECTION INDICATE 2 ORTHOGONAL FILTERS IN EARLY VISION
ASYMMETRIES IN ORIENTED-LINE DETECTION INDICATE 2 ORTHOGONAL FILTERS IN EARLY VISION
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DOI：
10.1098/rspb.1991.0013
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发表时间：
1991-01-22
影响因子：
4.7
通讯作者：
WARD, PA
中科院分区：
文献类型：
--
作者：
FOSTER, DH;WARD, PA
可以快速且毫不费力地实现对方向与背景线不同的线目标的视觉检测。假设这种表现发生在视觉早期，并且涉及在视野中并行作用的过滤机制。这项研究建立了这种性能的方向限制，并分析得出了底层过滤器的一些通用属性。研究发现，在简短的显示中，目标方向检测阈值从 0 度（垂直）和 90 度处的最小值随背景方向近似线性增加，而背景方向检测阈值从 0 度和 90 度处的最大值随目标方向近似线性减小。目标阈值函数和背景阈值函数完全反对称。这些数据显示了早期线路处理的模型，该模型由两类方向敏感滤波器主导，其轴接近垂直和水平，方向调整半宽度在半高处各约为 30 度。
Visual detection of a line target differing in orientation from a background of lines may be achieved speedily and effortlessly. Such performance is assumed to occur early in vision and to involve filter mechanisms acting in parallel over the visual field. This study establishes orientational limits on this performance and analytically derives some generic properties of the underlying filters. It was found that, in brief displays, target orientation detection thresholds increased approximately linearly with background orientation, from minima at 0-degrees (vertical) and 90-degrees, whereas background orientation detection thresholds decreased approximately linearly with target orientation, from maxima at 0-degrees and 90-degrees. Target and background threshold functions were exactly antisymmetric. These data are shown to indicate a model of early line processing dominated by two classes of orientation-sensitive filter with axes close to the vertical and horizontal and orientation-tuning half-widths each of approximately 30-degrees at half-height.