Temporal properties of disparity processing revealed by dynamic random-dot stereograms

Citation

Gheorghiu E & Erkelens CJ (2005) Temporal properties of disparity processing revealed by dynamic random-dot stereograms. Perception, 34 (10), pp. 1205-1219. https://doi.org/10.1068/p5404

Abstract
In studies of the temporal flexibility of the stereoscopic system, it has been suggested that two different processes of binocular depth perception could be responsible for the flexibility: tolerance for interocular delays and temporal integration of correlation. None has investigated the relationship between tolerance for delays and temporal integration mechanisms and none has revealed which mechanism is responsible for depth perception in dynamic random-dot stereograms. We address these questions in the present study. Across five experiments, we investigated the temporal properties of stereopsis by varying interocular correlation as a function of time in controlled ways. We presented different types of dynamic random-dot stereograms, each consisting of two pairs of alternating random-dot patterns. Our experimental results demonstrate that (i) disparities from simultaneous monocular inputs dominate those from interocular delayed inputs; (ii) stereopsis is limited by temporal properties of monocular luminance mechanisms; and (iii) depth perception in dynamic random-dot stereograms results from cross-correlation-like operation on two simultaneous monocular inputs that represent the retinal images after having been subjected to a process of monocular temporal integration of luminance.

Journal
Perception: Volume 34, Issue 10

People

Dr Elena Gheorghiu

Senior Lecturer, Psychology