PERCEIVING TEXTURES - BEYOND FILTERING
PERCEIVING TEXTURES - BEYOND FILTERING
复制标题
DOI：
10.1016/0042-6989(94)90328-x
复制
发表时间：
1994-01-01
期刊：
影响因子：
1.8
通讯作者：
NAKAYAMA, K
中科院分区：
文献类型：
--
作者：
HE, ZJJ;NAKAYAMA, K
经典的纹理分离理论和当前的视觉过滤模型表明，快速纹理分离是由早期皮层过滤的性质决定的。为了检验这一假设，我们操纵了纹理元素（L与条）相对于相邻正方形的双眼视差。这种操作对刺激的早期皮层过滤表征几乎没有影响，但对表面表征有很大影响。特别地，它可以确定图像块是在前面被视为不同的表面，还是在后面被视为更大的被遮挡表面的一部分。当被视为被遮挡表面的一部分时，每个纹理元素的独特形状被减少。因此，我们发现，纹理辨别性能受损时，纹理元素有未交叉的差异（“回”的情况下）。额外的实验表明，这一结果是不是由于单独的视差操纵，但只发生在每个纹理元素被视为一个闭塞的表面的一部分。我们的结论是，在快速纹理歧视，视觉系统不能忽略有关表面布局的信息。这表明，为了纹理感知的目的，要么：（a）视觉系统无法访问过滤后的图像，要么（B）人们不能接受不受高阶表面处理影响的过滤后的图像的概念。
Classical texture segregation theory and current visual filtering models suggest that rapid texture segregation is determined by the properties of early cortical filtering. To examine this assumption, we manipulated the binocular disparity of texture elements (an L vs a bar) relative to adjoining squares. Such a manipulation has little effect on the early cortical filtered representations of the stimuli but can have a strong influence on surface representation. In particular, it can determine whether an image patch is seen as a distinct surface, in front, or part of a larger occluded surface, in back. When seen as part of an occluded surface, the distinctive shape of each texture element is reduced. Accordingly, we found that texture discrimination performance was impaired when the texture elements had uncrossed disparities (''back'' case). Additional experiments indicated that this result was not due to the disparity manipulation alone, but occurred only when each texture element was perceived as part of an occluded surface. We conclude that in rapid texture discrimination, the visual system cannot ignore information regarding surface layout. This suggests that for purposes of texture perception, either: (a) the visual system has no access to the filtered image or (b) one cannot entertain the concept of a filtered image uninfluenced by higher order surface processing.