Document Detail

Modeling the combination of motion, stereo, and vergence angle cues to visual depth.
MedLine Citation:
PMID:  10423497     Owner:  NLM     Status:  MEDLINE    
Three models of visual cue combination were simulated: a weak fusion model, a modified weak model, and a strong model. Their relative strengths and weaknesses are evaluated on the basis of their performances on the tasks of judging the depth and shape of an ellipse. The models differ in the amount of interaction that they permit among the cues of stereo, motion, and vergence angle. Results suggest that the constrained nonlinear interaction of the modified weak model allows better performance than either the linear interaction of the weak model or the unconstrained nonlinear interaction of the strong model. Further examination of the modified weak model revealed that its weighting of motion and stereo cues was dependent on the task, the viewing distance, and, to a lesser degree, the noise model. Although the dependencies were sensible from a computational viewpoint, they were sometimes inconsistent with psychophysical experimental data. In a second set of experiments, the modified weak model was given contradictory motion and stereo information. One cue was informative in the sense that it indicated an ellipse, while the other cue indicated a flat surface. The modified weak model rapidly reweighted its use of stereo and motion cues as a function of each cue's informativeness. Overall, the simulation results suggest that relative to the weak and strong models, the modified weak fusion model is a good candidate model of the combination of motion, stereo, and vergence angle cues, although the results also highlight areas in which this model needs modification or further elaboration.
I Fine; R A Jacobs
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Neural computation     Volume:  11     ISSN:  0899-7667     ISO Abbreviation:  Neural Comput     Publication Date:  1999 Aug 
Date Detail:
Created Date:  1999-08-10     Completed Date:  1999-08-10     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  9426182     Medline TA:  Neural Comput     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1297-330     Citation Subset:  IM; S    
Center for Visual Science, University of Rochester, Rochester, NY 14627, USA.
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MeSH Terms
Computer Simulation
Convergence, Ocular / physiology*
Depth Perception / physiology*
Models, Biological*
Motion Perception / physiology*
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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