Abstract
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 20x20 deg or 10x10 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 20x20 deg to 10x10 deg does not affect the judgements significantly.
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Rieger, J.H., Toet, L. Human visual navigation in the presence of 3-D rotations. Biol. Cybern. 52, 377–381 (1985). https://doi.org/10.1007/BF00449594
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DOI: https://doi.org/10.1007/BF00449594