Rieger J H, Toet L
Biol Cybern. 1985;52(6):377-81. doi: 10.1007/BF00449594.
We report on the ability of human observers in judging their direction of translation from sparse, moving random dot patterns for varying extents of 3--D rotation. The observers have to discriminate possible axes of translation with angular separations of 2.5 deg or 5 deg. The field of view is either 20 X 20 deg or 10 X 10 deg. The simulated observer movement is relative to two types of scenes. The first type consists of dots located on a single plane at a depth Z. The second type of scenes consists of dots located on two transparent planes at different depths Z and Z + dZ. Unlike in the single plane condition, where the judgements about the direction of translation deteriorate quickly as the magnitude of 3--D rotation increases, we find for movements relative to planes at different distances a stable performance over a range of rotational magnitudes. Moreover we find that a reduction of the field of view from 20 X 20 deg to 10 X 10 deg does not affect the judgements significantly.
我们报告了人类观察者根据稀疏移动随机点图案判断其在不同程度三维旋转下的平移方向的能力。观察者必须区分角度间隔为2.5度或5度的可能平移轴。视野范围为20×20度或10×10度。模拟的观察者运动是相对于两种类型的场景而言的。第一种类型由位于深度为Z的单个平面上的点组成。第二种类型的场景由位于不同深度Z和Z + dZ的两个透明平面上的点组成。与在单个平面条件下不同，在单个平面条件下，随着三维旋转幅度的增加，对平移方向的判断会迅速恶化，而我们发现对于相对于不同距离平面的运动，在一系列旋转幅度范围内表现稳定。此外，我们发现视野范围从20×20度减小到10×10度并不会显著影响判断。
