Determination of visual figure and ground in dynamically deforming shapes
Determination of visual figure and ground in dynamically deforming shapes
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DOI：
10.1016/j.cognition.2005.12.002
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发表时间：
2006-10-01
期刊：
影响因子：
3.4
通讯作者：
Feldman, Jacob
中科院分区：
文献类型：
--
作者：
Barenholtz, Elan;Feldman, Jacob
图形/背景分配--确定视觉图像的哪一部分是前景，哪一部分是背景--是早期视觉分析中的关键步骤，以后的处理依赖于此。以前的研究分配的数字和地面的轮廓的相对两侧几乎完全涉及静态几何因素，如凸性，对称性，和大小在非运动图像。在这里，我们介绍了一类新的提示图形分配的动态变形轮廓的运动的基础上。观看动画的受试者，变形形状倾向于分配图形和地面，以便连接曲率极值，即，“铰接”垂直-具有负的（凹的）轮廓曲率。当所有已知的图形/背景的静态线索在动画的每个单独帧中都不存在或中性时，这种发音偏差就会出现，甚至当它们与运动线索相反时，似乎会覆盖一些众所周知的静态线索。我们认为，这种现象反映了视觉系统的内在期望的方式形状将变形，具体而言，变形往往涉及刚性零件在凹处接合。(c)2005 Elsevier B. V.保留所有权利。
Figure/ground assignment-determining which part of the visual image is foreground and which background-is a critical step in early visual analysis, upon which much later processing depends. Previous research on the assignment of figure and ground to opposing sides of a contour has almost exclusively involved static geometric factors-such as convexity, symmetry, and size-in non-moving images. Here, we introduce a new class of cue to figural assignment based on the motion of dynamically deforming contours. Subjects viewing an animated, deforming shape tended to assign figure and ground so that articulating curvature extrema, -i.e., "hinging" vertices-had negative (concave) contour curvature. This articulating-concavity bias is present when all known static cues to figure/ground are absent or neutral in each of the individual frames of the animation, and even seems to override a number of well-known static cues when they are in opposition to the motion cue. We propose that the phenomenon reflects the visual system's inbuilt expectations about the way shapes will deform-specifically, that deformations tend to involve rigid parts articulating at concavities. (c) 2005 Elsevier B.V. All rights reserved.