Chen Zhongting, Saunders Jeffrey A
Shanghai Key Laboratory of Brain Functional Genomics, Shanghai Changning-ECNU Mental Health Center, School of Psychology and Cognitive Science, East China Normal University, Shanghai, China.
Department of Psychology, University of Hong Kong, Hong Kong, Hong Kong SAR.
J Vis. 2019 Apr 1;19(4):7. doi: 10.1167/19.4.7.
The image of a textured surface provides multiple potential cues that could be used to perceive its 3D structure. When a surface texture has oriented structure, perspective convergence of the oriented components provides a texture cue, in addition to texture scaling and compression. Some findings suggest that oriented spectral components aligned with the direction of slant are important for 3D perception from texture, but this has only been demonstrated in restricted situations. In this study, we tested the contribution of oriented spectral components for planar surface patches with varied slant (0°-80°) and field of view (16° and 6°). Observers viewed simulated textured surfaces and estimated slant to the perceived surfaces. The simulated textures were octotropic plaids with a full range of orientations, or with either the aligned or perpendicular plaid components removed. We measured perceptual bias in monocular conditions and also the relative weighting of texture and stereo information in binocular conditions. We found that the presence of aligned spectral components did produce some improvement in slant estimates, but the effects were small and only observed in some conditions. There were no detectable differences in texture cue weights. Our results demonstrate that aligned spectral components contribute to perception of slant from texture, but suggest that the contribution is limited when other texture cues are available and informative. Our findings are consistent with the notion that the visual system utilizes multiple sources of texture information for 3D perception.
有纹理表面的图像提供了多种潜在线索，可用于感知其三维结构。当表面纹理具有定向结构时，除了纹理缩放和压缩外，定向成分的透视汇聚也提供了一种纹理线索。一些研究结果表明，与倾斜方向对齐的定向光谱成分对于从纹理中进行三维感知很重要，但这仅在有限的情况下得到了证明。在本研究中，我们测试了定向光谱成分对具有不同倾斜度（0°-80°）和视野（16°和6°）的平面表面块的贡献。观察者观看模拟的有纹理表面，并估计到感知表面的倾斜度。模拟纹理是具有全方向范围的八向格纹，或者去除了对齐或垂直的格纹成分。我们测量了单眼条件下的感知偏差，以及双眼条件下纹理和立体信息的相对权重。我们发现，对齐光谱成分的存在确实在倾斜度估计上产生了一些改善，但效果很小，且仅在某些条件下观察到。在纹理线索权重方面没有可检测到的差异。我们的结果表明，对齐光谱成分有助于从纹理中感知倾斜度，但表明当其他纹理线索可用且信息丰富时，这种贡献是有限的。我们的发现与视觉系统利用多种纹理信息源进行三维感知的观点一致。
