Single target acuity is not higher than grating acuity in a bird, the budgerigar.
Bird vision
Contrast sensitivity
Spatial resolution
Target acuity
Target detection
Visual acuity
Journal
Vision research
ISSN: 1878-5646
Titre abrégé: Vision Res
Pays: England
ID NLM: 0417402
Informations de publication
Date de publication:
07 2019
07 2019
Historique:
received:
01
10
2018
revised:
09
04
2019
accepted:
18
04
2019
pubmed:
11
5
2019
medline:
28
2
2020
entrez:
11
5
2019
Statut:
ppublish
Résumé
We examined the capacity of budgerigars (Melopsittacus undulatus) to visually detect dark single targets against a brighter background and established their spatial resolution limit for such targets. While the sampling density of the retina limits the resolution of gratings, target detection is theoretically limited by contrast sensitivity. This allows many animals to detect single targets smaller than their visual resolution limit, but this is not the case for budgerigars. The budgerigars were able to detect a high contrast circular target with a luminance profile of a single period of a sine wave subtending 0.065 degrees of their visual field, corresponding to a spatial acuity of 7.7 cycles degree
Identifiants
pubmed: 31075286
pii: S0042-6989(19)30089-6
doi: 10.1016/j.visres.2019.04.005
pii:
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
37-42Informations de copyright
Copyright © 2019 Elsevier Ltd. All rights reserved.