Temporal adaptation enhances efficient contrast gain control on natural images.
PLoS Comput Biol
; 9(1): e1002889, 2013.
Article
em En
| MEDLINE
| ID: mdl-23382664
ABSTRACT
Divisive normalization in primary visual cortex has been linked to adaptation to natural image statistics in accordance to Barlow's redundancy reduction hypothesis. Using recent advances in natural image modeling, we show that the previously studied static model of divisive normalization is rather inefficient in reducing local contrast correlations, but that a simple temporal contrast adaptation mechanism of the half-saturation constant can substantially increase its efficiency. Our findings reveal the experimentally observed temporal dynamics of divisive normalization to be critical for redundancy reduction.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Córtex Visual
/
Adaptação Fisiológica
/
Sensibilidades de Contraste
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article