EYE-MOVEMENTS AND STEREOPSIS DURING DICHOPTIC VIEWING OF MOVING RANDOM-DOT STEREOGRAMS
EYE-MOVEMENTS AND STEREOPSIS DURING DICHOPTIC VIEWING OF MOVING RANDOM-DOT STEREOGRAMS
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DOI：
10.1016/0042-6989(85)90141-5
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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
研究了与立体视觉有关的、整个视觉场景运动的方位和聚散度系统的动态特性。大的随机点立体图（30 × 30）。30度弧），横向移动，由人类受试者在没有固定的视觉参考系的情况下进行分视观察。构成立体图的两个半像的反相正弦运动引起正弦形眼聚散运动。聚散度的增益与刺激运动的频率和幅度有关，而相位滞后只与频率有关。融合和立体视觉保持到两个半图像的相对位置在6和13.5度/秒之间的最大变化速度。正弦运动的一个半图像，而另一个保持静止诱导正弦眼版本以及聚散运动。对于版本增益较高，相位滞后小于聚散度。在视网膜水平上，两个半图像之间高达2度弧的残余总体双眼视差是耐受的，而不会丧失立体视觉。正弦变化的整体双眼视差和眼聚散运动的存在下，没有感知的运动深度表明，这些变量是没有足够的线索感知（变化）的深度。
The dynamic properties of the version and vergence system were studied in relation to stereopsis for movements of the whole visual scene. Large random-dot stereograms (30 .times. 30 deg arc), moving laterally, were viewed dichoptically by human subjects without a fixed visual frame of reference. Sinusoidal movements in counterphase of the two half-images constituting the stereogram induced sinusoidal ocular vergence movements. The gain of vergence depended on the frequency as well as the amplitude of stimulus movement, while the phase lag depended only on the frequency. Fusion and stereopsis were remained up to a maximal velocity of change in relative position of the two half-images between 6 and 13.5 deg/sec. Sinusoidal movement of one half-image while the other one remained stationary induced sinusoidal ocular version as well as vergence movements. For version gains were higher and phase lags were smaller than for vergence. At the retinal level, residual overall binocular disparities between the two half-images up to 2 deg arc were tolerated without loss of stereopsis. The presence of sinusoidally varying overall binocular disparities and ocular vergence movements without perception of motion in depth suggests that these variables are not adequate cues for perception of (change in) depth.