The geometry of the occluding contour and its effect on motion interpretation.
The geometry of the occluding contour and its effect on motion interpretation.
复制标题
遮挡轮廓的几何形状及其对运动解释的影响。
DOI：
10.1167/4.10.9
复制
发表时间：
2004
影响因子：
1.8
通讯作者：
Adelson,EdwardH
中科院分区：
文献类型：
--
作者：
McDermott,Josh;Adelson,EdwardH
正确解释图像运动需要与遮挡相关的形状信息。这项工作描述了一系列关于运动感知的形式约束的研究之一。在目前的研究中，我们特别关注遮挡轮廓的几何形状，特别是它对运动的影响是否可以仅仅通过它对感知遮挡的影响来解释。我们使用一个被遮挡的正方形在一个圆圈中移动，在操纵遮挡轮廓的同时保持遮挡点恒定的t结点。我们发现了遮挡轮廓几何对运动解释和遮挡的两个主要影响的证据：遮挡轮廓的凸性和在遮挡轮廓上其他地方形成的额外静态t形结。我们的研究结果表明，凸遮挡轮廓比凹遮挡轮廓更强，并且沿轮廓的t形结点根据其方向增加或减少遮挡强度。运动解释受到这两个因素的影响，但它们对运动的影响似乎主要是在中间“半局部”尺度上发生的相互作用，该尺度大于定义连接点的尺度，但小于整个运动图形的尺度。我们提出这些计算与遮挡有关，但与介导静态遮挡判断的计算不同。
Form information related to occlusion is needed to correctly interpret image motion. This work describes one of a series of investigations into the form constraints on motion perception. In the present study, we focus specifically on the geometry of the occluding contour, and in particular on whether its influence on motion can be accounted for merely by its effect on perceived occlusion. We used an occluded square moving in a circle, holding the T-junctions at points of occlusion constant while manipulating the occluding contour. We found evidence for two main influences of occluding contour geometry on motion interpretation and occlusion: the convexity of the occluding contour and additional static T-junctions that are formed elsewhere on the occluding contour. Our results suggest that convex occluding contours are more occlusive than concave ones, and that T-junctions along the contour increase or decrease the strength of occlusion depending on their orientation. Motion interpretation is influenced by both factors, but their effect on motion appears to be dominated by interactions occurring at an intermediate “semilocal” scale, which is larger than the scale at which junctions are defined, but smaller than the scale of the whole moving figure. We propose that these computations are related to occlusion but are not identical to the computations that mediate static occlusion judgments.
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DOI：
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发表时间：
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期刊：
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影响因子：
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作者：
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