Gillam B, Ryan C
Department of Psychology, University of New South Wales, Kensington, Australia.
Perception. 1992;21(4):427-39. doi: 10.1068/p210427.
Stereoscopic depth estimates are not predictable from the geometry of point disparities. The configural properties of surfaces (surface contours) may play an important role in determining, for example, slant responses to a disparity gradient, and the marked anisotropy in favour of slant around a horizontal axis. It has been argued that variation in slant magnitude are attributable to the degree of perspective conflict present and that anisotropy is attributable to orientation disparity, which varies with the axis of slant. Three experiments were conducted in which configural properties were varied to try and tease apart the respective roles of orientation disparity and conflicting perspective in determining stereoscopic slant perception and slant axis anisotropy. The results could not be accounted for by the magnitude of the orientation disparities present. Conflicting perspective cues appeared to play a role but only for slant around a vertical axis. It was concluded that there are important configural effects in stereopsis attributable neither to orientation disparity nor to perspective.
立体深度估计无法从点视差的几何结构中预测出来。表面的构型属性（表面轮廓）在确定例如对视差梯度的倾斜响应以及围绕水平轴的明显倾斜各向异性方面可能起着重要作用。有人认为，倾斜幅度的变化可归因于存在的透视冲突程度，而各向异性可归因于方向视差，方向视差随倾斜轴而变化。进行了三个实验，其中改变构型属性以试图区分方向视差和冲突透视在确定立体倾斜感知和倾斜轴各向异性方面各自的作用。结果无法用所呈现的方向视差的大小来解释。冲突的透视线索似乎起到了作用，但仅针对围绕垂直轴的倾斜。得出的结论是，在立体视觉中存在重要的构型效应，既不能归因于方向视差，也不能归因于透视。
