Document Detail

Disruptive coloration, crypsis and edge detection in early visual processing.
MedLine Citation:
PMID:  16901833     Owner:  NLM     Status:  MEDLINE    
Many animals use concealing markings to reduce the risk of predation. These include background pattern matching (crypsis), where the coloration matches a random sample of the background and disruptive patterns, whose effectiveness has been hypothesized to lie in breaking up the body into a series of apparently unrelated objects. We have previously established the effectiveness of disruptive coloration against avian predators, using artificial moth-like stimuli with colours designed to match natural backgrounds as perceived by birds. Here, we investigate the mechanism by which disruptive patterns reduce detectability, using a computational vision model of edge detection applied to photographs of our experimental stimuli, calibrated for bird colour vision. We show that, disruptive coloration is effective by exploiting edge detection algorithms that we use to model early visual processing. Thus, 'false' edges are detected within the body rather than at its periphery, so inhibiting successful detection of the animal's body outline.
Martin Stevens; Innes C Cuthill
Related Documents :
9135863 - Additive effect of luminance and color cues in generation of neon color spreading.
4071993 - Two temporal phases, brightness-dependent and -independent, in the chromatic response e...
22467223 - High-efficiency, microscale gan light-emitting diodes and their thermal properties on u...
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Proceedings. Biological sciences / The Royal Society     Volume:  273     ISSN:  0962-8452     ISO Abbreviation:  Proc. Biol. Sci.     Publication Date:  2006 Sep 
Date Detail:
Created Date:  2006-08-11     Completed Date:  2006-11-20     Revised Date:  2013-06-07    
Medline Journal Info:
Nlm Unique ID:  101245157     Medline TA:  Proc Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  2141-7     Citation Subset:  IM    
School of Biological Sciences, University of Bristol, Woodland Road, Bristol BS8 1UG, UK.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Birds / physiology*
Color Perception / physiology*
Computer Simulation
Contrast Sensitivity / physiology*
Models, Theoretical*
Pattern Recognition, Visual / physiology*

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

Previous Document:  A basal ceratopsian with transitional features from the Late Jurassic of northwestern China.
Next Document:  The distribution of species diversity across a flora's component lineages: dating the Cape's 'relict...