On a common circle: natural scenes and Gestalt rules.
On a common circle: natural scenes and Gestalt rules.
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DOI：
10.1073/pnas.98.4.1935
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发表时间：
2001-02
影响因子：
11.1
通讯作者：
Mariano Sigman;Guillermo A. Cecchi;Charles D. Gilbert;M. Magnasco
中科院分区：
文献类型：
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作者：
Mariano Sigman;Guillermo A. Cecchi;Charles D. Gilbert;M. Magnasco
要了解人类视觉系统如何分析图像，必须了解视觉环境的结构。特别是，自然图像显示一致的统计特性，将它们与随机亮度分布区分开来。我们已经研究了在视觉场景的集合中存在的定向元素（边缘或线段）的几何形状，询问在视觉场景的特定位置中的片段的存在携带关于在不同相对位置和方向上的第二片段的存在的信息量。我们观察到强的长程相关性的分布中的定向段，延伸到整个视野。我们进一步表明，一个非常简单的几何规则，共圆，预测的自然场景中的片段的安排，不同的几何安排显示其缩放特性的相关差异。我们的研究结果表明，以前的生理和心理物理学研究的几何特征的相似之处。我们讨论了这些发现的早期视觉理论的影响。
To understand how the human visual system analyzes images, it is essential to know the structure of the visual environment. In particular, natural images display consistent statistical properties that distinguish them from random luminance distributions. We have studied the geometric regularities of oriented elements (edges or line segments) present in an ensemble of visual scenes, asking how much information the presence of a segment in a particular location of the visual scene carries about the presence of a second segment at different relative positions and orientations. We observed strong long-range correlations in the distribution of oriented segments that extend over the whole visual field. We further show that a very simple geometric rule, cocircularity, predicts the arrangement of segments in natural scenes, and that different geometrical arrangements show relevant differences in their scaling properties. Our results show similarities to geometric features of previous physiological and psychophysical studies. We discuss the implications of these findings for theories of early vision.