Context affects lightness at the level of surfaces.
Context affects lightness at the level of surfaces.
复制标题
环境影响表面的亮度
DOI：
10.1167/15.1.15
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发表时间：
2015
影响因子：
1.8
通讯作者：
Shapley
中科院分区：
文献类型：
--
作者：
Maertens;Wichmann;Shapley
对物体属性的视觉感知，如表面亮度，对于与环境的成功交互至关重要。视觉系统如何为图像区域分配亮度尚不清楚。已有研究表明，表面嵌入的背景会影响其感知的亮度，但这种影响是否主要涉及低、中或高水平的视觉机制尚未得到解决。为了回答这个问题，我们测量了目标图像区域的知觉属性是否影响了它们被放置在不同背景下的感知亮度。我们改变边缘的锐度，同时保持总的目标流量不变。具有锐利边缘的目标与对表面的感知解释一致，在这种情况下，观察者感觉到目标显著变亮或变暗。边缘模糊的目标看起来更像是聚光灯，而不是表面；对于边缘模糊的目标，背景对目标亮度的影响要小得多。结果表明，背景对图像区域亮度的影响不是固定的，而是受到图像操纵的强烈影响，图像操纵改变了目标的知觉属性，这意味着中等水平的场景解释影响了亮度感知。
Visual perception of object attributes such as surface lightness is crucial for successful interaction with the environment. How the visual system assigns lightness to image regions is not yet understood. It has been shown that the context in which a surface is embedded influences its perceived lightness, but whether that influence involves predominantly low-, mid-, or high-level visual mechanisms has not been resolved. To answer this question, we measured whether perceptual attributes of target image regions affected their perceived lightness when they were placed in different contexts. We varied the sharpness of the edge while keeping total target flux fixed. Targets with a sharp edge were consistent with the perceptual interpretation of a surface, and in that case, observers perceived significant brightening or darkening of the target. Targets with blurred edges rather appeared to be spotlights instead of surfaces; for targets with blurred edges, there was much less of a contextual effect on target lightness. The results indicate that the effect of context on the lightness of an image region is not fixed but is strongly affected by image manipulations that modify the perceptual attributes of the target, implying that a mid-level scene interpretation affects lightness perception.
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影响因子：
1.8
作者：
Rudd, Michael E.
通讯作者：
Rudd, Michael E.
影响因子：
--
作者：
HEINEMANN, EG
通讯作者：
HEINEMANN, EG
影响因子：
--
作者：
WALLACH, H
通讯作者：
WALLACH, H
影响因子：
1.8
作者：
M. Maertens;Felix Wichmann
通讯作者：
M. Maertens;Felix Wichmann
DOI：
10.1364/josaa.30.000342
发表时间：
2013-03-01
影响因子：
1.9
作者：
Ekroll, Vebjorn;Faul, Franz
通讯作者：
Faul, Franz