Yeh Y Y, Silverstein L D
Department of Psychology, University of Wisconsin, Madison 53706.
Hum Factors. 1992 Oct;34(5):583-600. doi: 10.1177/001872089203400506.
Spatial judgments with monoscopic and stereoscopic presentation of perspective displays were investigated in the present study. The stimulus configuration emulated a visual scene consisting of a volume of airspace above a ground reference plane. Two target symbols were situated at various positions in the space, and observers were instructed to identify the relative depth or altitude of the two symbols. Three viewing orientations (15, 45, or 90 deg elevation angle) were implemented in the perspective projection. In the monoscopic view, depth cues in size, brightness, occlusion, and linear perspective were provided in the format. In the stereoscopic view, binocular disparity was added along the line of sight from the center of projection to reinforce the relative depth in the visual scene. Results revealed that spatial judgments were affected by manipulation of the relative spatial positions of the two target symbols and by the interaction between relative position and viewing orientation. The addition of binocular disparity improved judgments of three-dimensional spatial relationships, and the enhancement was greater when monocular depth cues were less effective and/or ambiguous in recovering the three-dimensional spatial characteristics.
本研究调查了在单目和立体呈现透视显示时的空间判断。刺激配置模拟了一个视觉场景，该场景由地面参考平面上方的一定空域组成。两个目标符号位于空间中的不同位置，观察者被要求识别这两个符号的相对深度或高度。在透视投影中采用了三种观察方向（仰角为15、45或90度）。在单目视图中，以尺寸、亮度、遮挡和线性透视等形式提供深度线索。在立体视图中，沿着从投影中心出发的视线添加双目视差，以增强视觉场景中的相对深度。结果表明，空间判断受到两个目标符号相对空间位置的操纵以及相对位置与观察方向之间相互作用的影响。双目视差的添加改善了对三维空间关系的判断，并且当单目深度线索在恢复三维空间特征方面效果较差和/或不明确时，这种增强作用更大。
