Synergy of features enables detection of texture defined figures.

Synergy of features enables detection of texture defined figures.
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特征的协同作用可以检测纹理定义的图形

DOI:
10.1163/156856806775009214
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--
期刊:
影响因子:
--
通讯作者:
Meinhardt
Meinhardt
中科院分区:
--
文献类型:
--
作者:
Persike;Meinhardt

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早期视觉处理的传统理论表明,基本视觉特征是由独立的神经通路并行处理的。我们研究了Gabor随机场判别中方向和空间频率的相互作用。目标纹理与参考纹理的不同之处在于平均特征值,显示两个纹理之间的类似边缘的过渡(边缘定义),或者具有平滑过渡的特征同质性程度(区域定义)。无论纹理定义的类型如何,只要满足两个条件,我们就发现两个线索同时定义的目标具有很强的线索求和。首先,当仅用一个提示来定义时,它们几乎无法区分。其次,目标元素形成一个封闭的二维表面。当目标元素不均匀地分布在预定义区域中,缺乏清晰的二维形状时,仅观察到边缘提示求和。我们的研究结果表明,当来自独立特征特定路径的信息不足以解决此任务时,特征协同作用可以实现图形-背景分离。
Traditional theories of early visual processing suggest that elementary visual features are handled in parallel by independent neural pathways. We studied the interaction of orientation and spatial frequency in the discrimination of Gabor random fields. Target textures differed from reference textures either in mean feature value, showing an edge-like transition between both textures (edge defined), or in the degree of feature homogeneity with smooth transitions (region defined). Irrespective of the kind of texture definition, we found strong cue summation for targets defined by both cues simultaneously, provided two conditions were fulfilled. First, they were barely discriminable when defined by one cue alone. Second, the target elements formed a closed 2D surface. Only marginal cue summation was observed when target elements were heterogeneously distributed in a predefined area, lacking a clear 2D shape. Our findings indicate that feature synergy enables figure-ground segregation when the information from independent feature-specific pathways is insufficient for solving this task.
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