Document Detail

Blur and contrast as pictorial depth cues.
MedLine Citation:
PMID:  9488884     Owner:  NLM     Status:  MEDLINE    
Studies have shown that blur can act as a pictorial cue to depth perception. But blurring a stimulus reduces its contrast, and studies have also shown that contrast can act as a pictorial cue to depth perception. To determine whether blur and contrast have separate influences on depth perception, each variable was independently manipulated in two experiments. Observers reported depth alternations in a simple reversible figure. Both contrast and blur were found to influence depth perception, but blur had its greatest effect at moderate contrasts. When blurred and sharp stimuli were equated on either Michelson or RMS contrast, blur continued to affect depth perception. Hence blur can act as a depth cue independently of contrast. It is speculated that blur is effective as a pictorial cue because of its usual association with other depth cues, particularly in pictures and photographs.
R P O'Shea; D G Govan; R Sekuler
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Perception     Volume:  26     ISSN:  0301-0066     ISO Abbreviation:  Perception     Publication Date:  1997  
Date Detail:
Created Date:  1998-03-16     Completed Date:  1998-03-16     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372307     Medline TA:  Perception     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  599-612     Citation Subset:  IM    
Department of Psychology, University of Otago, Dunedin, New Zealand.
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MeSH Terms
Contrast Sensitivity / physiology*
Depth Perception / physiology*
Perceptual Distortion*

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