The role of spatial phase in texture segmentation and contour integration
The role of spatial phase in texture segmentation and contour integration
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DOI：
10.1167/6.5.5
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发表时间：
2006-01-01
影响因子：
1.8
通讯作者：
Hess, Robert F.
中科院分区：
文献类型：
--
作者：
Hansen, Bruce C.;Hess, Robert F.
最近有人认为，视觉系统只有两个相位“检测器”机制，即+余弦和-余弦（P. C。Huang，F. A. Kingdom，& R. F. Hess，2006）。这表明，神经生理学家告诉我们的感受野相位的丰富分布在纹状体简单细胞的不同反应曲线中表现出来，但这种分布相当有限。而这项研究表明，纹状体感受野相位是不直接提供给感知的检测/歧视的本地化刺激，在这里，我们调查这些信息是否可能被用于更多的综合条纹或外纹功能，如纹理分离或轮廓整合。具体来说，鉴于简单的细胞有不同的本地绝对相位响应曲线，我们问是否有类似的相位偏好的简单细胞的网络相互作用的方式，以提取纹理，轮廓，或两者的基础上单独相位。两个新的纹理分割实验和一个轮廓整合实验进行了打算提供一个答案的问题是如何有用的局部绝对空间相位纹理分割和轮廓整合。结果支持的可能性，两个阶段的机制（+/-余弦）的全局纹理分割，以及轮廓整合，当组成一个给定的轮廓的元素是正交的轮廓路径。
It has been recently argued that the visual system possesses just two phase "detector'' mechanisms, namely, + cosine and -cosine ( P. C. Huang, F. A. Kingdom, & R. F. Hess, 2006). This suggests rather limited access to the rich distribution of receptive field phase that neurophysiologists tell us are represented in the different response profiles of striate simple cells. Whereas that study has suggested that striate receptive field phase is not directly available to perception for the detection/discrimination of localized stimuli, here we investigate whether such information might be used in more integrative striate or extrastriate functions such as texture segregation or contour integration. Specifically, given that simple cells have different local absolute phase response profiles, we ask whether a network of simple cells with similar phase preferences interact in such a way as to extract textures, contours, or both based on phase alone. Two novel texture segmentation experiments and one contour integration experiment were carried out with the intention of providing an answer to the question of how useful is local absolute spatial phase for texture segmentation and contour integration. The results support the possibility of two phase mechanisms (+/-cosine) for global texture segmentation, as well as for contour integration, when the elements that make up a given contour are orthogonal to contour paths.