Seeing grating-textured surface begins at the border.
Seeing grating-textured surface begins at the border.
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DOI：
10.1167/11.1.14
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发表时间：
2011-01-18
影响因子：
1.8
通讯作者：
Ooi TL
中科院分区：
文献类型：
--
作者：
Su YR;He ZJ;Ooi TL
进行了两个实验来揭示人类视觉系统使用边界到内部策略来表示光栅纹理表面。该策略要求视觉系统首先记录表面边界轮廓，然后依次将纹理从边界扩展到图像内部。我们的实验测量了光栅纹理图像出现后不同刺激持续时间下感知的光栅纹理表面。我们发现光栅纹理最初出现在边界轮廓附近，最终向内扩散到图像的中心。为了量化观察结果，纹理从边界轮廓扩散的程度被测量为刺激持续时间（30-500 ms）的函数。这使我们能够根据皮质区域 V1-V4 中皮质放大系数的人类功能磁共振成像研究来分析视网膜和皮质距离中的纹理传播，并推导出传播速度。我们发现，根据皮质距离缩放时，传播速度是恒定的。无论光栅纹理图像是单眼还是二分光呈现，都会得到类似的结果，表明边界到内部策略表示表面的通用性。
Two experiments were conducted to reveal that the human visual system represents grating texture surface using a border-to-interior strategy. This strategy dictates that the visual system first registers the surface boundary contour and then sequentially spreads texture from the border to the interior of the image. Our experiments measured the perceived grating texture surface at various stimulus durations after the onset of a grating texture image. We found that the grating texture is initially seen near the boundary contours, with eventual spreading inward to the center of the image. To quantify the observation, the extent of the texture spreading from the boundary contour is measured as a function of the stimulus duration (30–500 ms). This allows us to analyze the texture spreading in retinal and cortical distances, based on human fMRI studies of the cortical magnification factor in cortical areas V1–V4, and to derive the spreading speed. We found that the spreading speed is constant when scaled according to the cortical distance. Similar findings are obtained no matter whether the grating texture image is presented monocularly or dichoptically, suggesting the generality of the border-to-interior strategy for representing surfaces.
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