The role of vertical mirror symmetry in visual shape detection
The role of vertical mirror symmetry in visual shape detection
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DOI：
10.1167/9.12.11
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发表时间：
2009-01-01
影响因子：
1.8
通讯作者：
Wagemans, Johan
中科院分区：
文献类型：
--
作者：
Machilsen, Bart;Pauwels, Maarten;Wagemans, Johan
我们的研究目的是更好地理解垂直镜像对称在知觉分组中的作用。通过一个简单的心理物理任务和一组受控刺激，我们研究了垂直镜像对称是否作为图形-背景分离的线索。我们要求参与者指出两个连续呈现的Gabor阵列中的哪一个包含视觉形状。该形状由沿着不熟悉形状的轮廓沿着定位的Gabor元素的子集定义。通过向这些Gabor元素添加方向噪声，形状感知变得不那么突出。在不同的噪声水平下，对称形状比不对称形状更容易检测。这一发现表明，垂直镜像对称性确实被用作知觉分组的线索。
The goal of our study is a better understanding of the role of vertical mirror symmetry in perceptual grouping. With a simple psychophysical task and a set of controlled stimuli, we investigated whether vertical mirror symmetry acts as a cue in figure-ground segregation. We asked participants to indicate which of two sequentially presented Gabor arrays contained a visual shape. The shape was defined by a subset of Gabor elements positioned along the outline of an unfamiliar shape. By adding orientation noise to these Gabor elements, the shape percept became less salient. Across the different noise levels, symmetric shapes were easier to detect than asymmetric ones. This finding indicates that vertical mirror symmetry is indeed used as a cue in perceptual grouping.