Perceptual categories for spatial layout.

Perceptual categories for spatial layout.
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空间布局的感知类别。

DOI:
10.1098/rstb.1997.0099
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发表时间:
1997
期刊:
Philosophical transactions of the Royal Society of London. Series B, Biological sciences
影响因子:
--
通讯作者:
Kersten,D
Kersten,D
中科院分区:
--
文献类型:
--
作者:
Kersten,D

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视觉的核心问题通常分为物体识别和定位。物体识别,至少在精细的辨别水平上,可能需要应用自上而下的知识来解决模糊的图像信息。然而,利用自上而下的知识,可能需要基于低级图像线索的抽象对象类别的初始快速访问。物体定位是否需要一套不同于物体识别的操作原则,或者类别确定也是深度和空间布局感知的一部分?三维图形电影的对象和他们的投下的阴影被用来争辩说,识别感知类别是重要的,以确定相对深度的对象。可以识别生成图像数据的因果类别(例如,材料的种类)的过程可以提供信息以确定表面之间的空间关系。边缘模糊度的变化可能与两个曲面之间的相对运动引起的阴影有关。抽象事件的早期识别,如移动对象/阴影对也可能是重要的深度从阴影。图像中的相关运动如何与对象及其阴影相关的知识可以提供访问这样的事件类别的可靠线索。
The central problems of vision are often divided into object identification and localization. Object identification, at least at fine levels of discrimination, may require the application of top–down knowledge to resolve ambiguous image information. Utilizing top–down knowledge, however, may require the initial rapid access of abstract object categories based on low–level image cues. Does object localization require a different set of operating principles than object identification or is category determination also part of the perception of depth and spatial layout? Three–dimensional graphics movies of objects and their cast shadows are used to argue that identifying perceptual categories is important for determining the relative depths of objects. Processes that can identify the causal class (e.g. the kind of material) that generates the image data can provide information to determine the spatial relationships between surfaces. Changes in the blurriness of an edge may be characteristically associated with shadows caused by relative motion between two surfaces. The early identification of abstract events such as moving object/shadow pairs may also be important for depth from shadows. Knowledge of how correlated motion in the image relates to an object and its shadow may provide a reliable cue to access such event categories.
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