Co-circularity opponency in visual texture
Co-circularity opponency in visual texture
复制标题
视觉纹理中的共圆对抗
DOI：
10.1038/s41598-018-38029-w
复制
发表时间：
2019
影响因子：
4.6
通讯作者：
Motoyoshi Isamu
中科院分区：
文献类型：
--
作者：
Sato Hiromi;Kingdom Frederick A. A.;Motoyoshi Isamu
众所周知，人类视觉系统对定向边缘之间的共圆性敏感，这是物体轮廓普遍存在的特征。在这里，我们报告了一种新颖的后效，其中纹理的外观在适应由具有共圆结构的元素组成的纹理后发生了巨大的改变。在长时间观察由布置成钝角共圆对（即浅曲线）的相邻伽博元素对构成的纹理之后，随后观察到的随机纹理似乎由锐角（即近平行对）组成。相反，适应由平行对组成的纹理会导致随机纹理看起来由浅曲线组成。这表明对共圆敏感的机制是以相反的方式组织的，其中一个极对浅曲线敏感，而其他平行形状敏感。这一概念在非适应实验中得到了进一步测试，其中共圆和非共圆 Gabor 对混合在单个纹理中。结果揭示了落在对手连续体一侧的对之间的求和，以及落在连续体相反两侧的对之间的抵消。总的来说，这些结果支持对成对共圆纹理特征敏感的机制之间的对手相互作用。
It is well known that the human visual system is sensitive to co-circularity among oriented edges, which are ubiquitous features of object contours. Here, we report a novel aftereffect in which the appearance of a texture is dramatically altered after adaptation to a texture composed of elements with co-circular structure. Following prolonged viewing of a texture made of pairs of adjacent Gabor elements arranged to form obtuse angle co-circular pairs, i.e. shallow curves, a subsequently viewed random texture appears to be composed of acute angle, i.e. near-parallel pairs. Conversely, adaptation to a texture made of parallel pairs causes a random texture to appear to be composed of shallow curves. This suggests that mechanisms sensitive to co-circularity are organized in an opponent manner, with one pole sensitive to shallow curves the other parallel shapes. This notion was tested further in a non-adaptation experiment in which co-circular and non-co-circular Gabor pairs were mixed within a single texture. Results revealed summation between pairs that fell on one side of the opponent continuum, and cancellation between pairs that fell on opposite sides of the continuum. Taken together these results support opponent interactions between mechanisms sensitive to pairwise co-circular texture features.