Munck-Fairwood R C
Department of Electronic and Electrical Engineering, University of Surrey, England, UK.
Perception. 1992;21(6):747-52. doi: 10.1068/p210747.
Incongruous and illusory depth cues, arising from 'interference patterns' produced by overlapping linear grids at the edges of escalator treads, may contribute to the disorientation experienced by some escalator users, which in turn may contribute to the causes of some of the many escalator accidents which occur. The apparent depth of the interference pattern from the viewer is analysed in terms of the cues deriving from size and viewer motion. Both of these cues support the depth of the target being infinite. Preliminary observations are reported which confirm this analysis. Remedies for the problem are suggested. The possible contribution of this illusion to disorientation on escalators, due to misjudgment of depth, is compared with another recently reported factor which is due to stereoscopic miscorrespondence of periodic targets.
自动扶梯踏板边缘处重叠的线性网格产生的“干涉图案”所引发的不协调和虚幻深度线索，可能会导致一些自动扶梯使用者产生方向迷失，而这反过来可能是众多自动扶梯事故发生原因的一部分。从观察者角度分析干涉图案的表观深度，依据来自尺寸和观察者运动的线索进行。这两条线索都表明目标的深度是无限的。报告了初步观察结果，证实了这一分析。针对该问题提出了补救措施。将这种因深度误判导致的错觉对自动扶梯上方向迷失的可能影响，与最近报道的另一个因周期性目标的立体对应错误导致的因素进行了比较。
