Depth thresholds of motion parallax as a function of head movement velocity.
The lower parallactic depth threshold is determined by (a) the ratio of relative image velocity to head velocity when the head moves fast (>13 cm/s) and (b) the motion threshold when the head moves slow (<13 cm/s). These two results are explained by a single system that codes the ratio of relative image velocity to head velocity, using the same image velocity signal as that used for motion perception. In this explanation, ratios coded from low relative image velocities, which are slightly higher than the motion threshold, produce a perception of depth only when the head moves slowly.
Ujike
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Centre for Vision Research, York University, 4700 Keele Street, Toronto, Ontario, Canada M3J 1P3. h.ujike@aist.go.jp
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D003867:Depth Perception / Q000502:physiology*; D004056:Differential Threshold; D005260:Female; D019416:Head Movements / Q000502:physiology*; D006801:Humans; D008297:Male; D009039:Motion Perception / Q000502:physiology*