MOTION PERCEPTION DURING DICHOPTIC VIEWING OF MOVING RANDOM-DOT STEREOGRAMS
MOTION PERCEPTION DURING DICHOPTIC VIEWING OF MOVING RANDOM-DOT STEREOGRAMS
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DOI：
10.1016/0042-6989(85)90164-6
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发表时间：
1985-01-01
期刊：
影响因子：
1.8
通讯作者：
COLLEWIJN, H
中科院分区：
文献类型：
--
作者：
ERKELENS, CJ;COLLEWIJN, H
研究了双眼和单眼运动知觉之间的关系。随机点立体图(30倍30度弧度)，包含在立体视觉中背景前面看到的中心图形，在没有固定视觉参照系的情况下，被试以双视方式观看。右眼和左眼看到的图像按字面上的三角波形式移动，呈反相，但幅度比不同。在此条件下，仅感觉到立体图的纯横向运动，没有整体的深度运动，同时保持了图形-背景关系的立体视觉。通过手动跟踪感知的位移来表示的双眼感知的横向运动的大小等于单眼运动感知的代数平均值。作为特例，当构成立体图的两个图像以相同的速度移动但方向相反时，它们在立体深度上被感知为完全静止的、融合的图像。只有增加一个固定的参照物(两只眼睛都能看到的条形或格栅)才能产生深度运动的感觉。视觉参照系对于深度运动的感知是必不可少的，但对于侧向运动的感知则不是。这似乎不是绝对的双眼视差(视网膜位置差异)，而是相对双眼视差(两个视网膜图像中两个或更多对应特征之间的角距离差异)是深度感知的线索。
The relation between binocular and monocular motion perception was investigated. A random-dot stereogram (30 .times. 30 degree arc), containing a central figure seen in front of the background in stereoscopic vision, was viewed dichoptically by human subjects without a fixed visual frame of reference. The images seen by the right and left eye were moved literally according to a triangular wave form, in counterphase, but with variable amplitude ratios. Under this condition only purely lateral movement and no motion in depth of the stereogram as a whole was perceived, while stereoscopic vision of the figure-background relation was maintained. The magnitude of the binocularly perceived lateral motion, signaled by manual tracking of the perceived displacement, equaled the algebraic mean of the monocular motion percepts. As a special case, when the 2 images forming the stereogram were moved with equal velocities but in opposite directions they were perceived as a completely stationary, fused image in stereoscopic depth. Only the addition of a stationary refererence (a bar or grating seen by both eyes) resulted in the perception of motion in depth. A visual frame of reference is essential for perception of motion in depth but not for perception of lateral movements. It seems likely that not absolute binocular disparity (retinal locus differences) but relative binocular disparity (differences in angular distance between 2 or more correspondng features in the 2 retinal images) is a cue for perception of depth.