Advanced

Relative colour cues improve colour constancy in birds

Olsson, Peter LU and Kelber, Almut LU (2017) In Journal of Experimental Biology 220(10). p.1797-1802
Abstract

A ripe strawberry looks red to our eyes in sunlight and in the green light of a forest, although the spectrum of light reflected from its surface differs dramatically. This is caused by two effects: colour constancy and our ability to learn relative colour cues - the ripe strawberry remains relatively 'redder' than an unripe green strawberry. While colour constancy - the ability to recognize colours in shifted illumination - has been studied in many animals, the use of relative colour cues is investigated more rarely. In a previous study on chickens, we measured how large a shift in illumination their colour constancy mechanisms tolerate without reliable relative colour cues. Here, we show that chickens remain colour constant over... (More)

A ripe strawberry looks red to our eyes in sunlight and in the green light of a forest, although the spectrum of light reflected from its surface differs dramatically. This is caused by two effects: colour constancy and our ability to learn relative colour cues - the ripe strawberry remains relatively 'redder' than an unripe green strawberry. While colour constancy - the ability to recognize colours in shifted illumination - has been studied in many animals, the use of relative colour cues is investigated more rarely. In a previous study on chickens, we measured how large a shift in illumination their colour constancy mechanisms tolerate without reliable relative colour cues. Here, we show that chickens remain colour constant over larger illumination shifts, if they can use such relative colour cues. As relative colour cues are readily available in natural environments, we suggest that their use contributes strongly to colour constancy performance in nature.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Bird vision, Colour vision, Novel colour, Relational colour constancy, Relative colour learning
in
Journal of Experimental Biology
volume
220
issue
10
pages
6 pages
publisher
The Company of Biologists Ltd
external identifiers
  • scopus:85019841078
  • wos:000401483300010
ISSN
0022-0949
DOI
10.1242/jeb.155424
language
English
LU publication?
yes
id
e7cfb7f3-0f6c-4fd7-b59f-d86f6e16a8a3
date added to LUP
2017-07-04 07:03:03
date last changed
2018-04-08 04:58:27
@article{e7cfb7f3-0f6c-4fd7-b59f-d86f6e16a8a3,
  abstract     = {<p>A ripe strawberry looks red to our eyes in sunlight and in the green light of a forest, although the spectrum of light reflected from its surface differs dramatically. This is caused by two effects: colour constancy and our ability to learn relative colour cues - the ripe strawberry remains relatively 'redder' than an unripe green strawberry. While colour constancy - the ability to recognize colours in shifted illumination - has been studied in many animals, the use of relative colour cues is investigated more rarely. In a previous study on chickens, we measured how large a shift in illumination their colour constancy mechanisms tolerate without reliable relative colour cues. Here, we show that chickens remain colour constant over larger illumination shifts, if they can use such relative colour cues. As relative colour cues are readily available in natural environments, we suggest that their use contributes strongly to colour constancy performance in nature.</p>},
  author       = {Olsson, Peter and Kelber, Almut},
  issn         = {0022-0949},
  keyword      = {Bird vision,Colour vision,Novel colour,Relational colour constancy,Relative colour learning},
  language     = {eng},
  month        = {05},
  number       = {10},
  pages        = {1797--1802},
  publisher    = {The Company of Biologists Ltd},
  series       = {Journal of Experimental Biology},
  title        = {Relative colour cues improve colour constancy in birds},
  url          = {http://dx.doi.org/10.1242/jeb.155424},
  volume       = {220},
  year         = {2017},
}