A Neurodynamical Model of Brightness Induction in V1
Penacchio, Olivier (Universitat Autònoma de Barcelona. Departament de Ciències de la Computació)
Otazu Porter, Xavier (Universitat Autònoma de Barcelona. Departament de Ciències de la Computació)
Dempere-Marco, Laura (Universitat Pompeu Fabra. Departament de Tecnologies de la Informació i les Comunicacions)

Data:	2013
Resum:	Brightness induction is the modulation of the perceived intensity of an area by the luminance of surrounding areas. Recent neurophysiological evidence suggests that brightness information might be explicitly represented in V1, in contrast to the more common assumption that the striate cortex is an area mostly responsive to sensory information. Here we investigate possible neural mechanisms that offer a plausible explanation for such phenomenon. To this end, a neurodynamical model which is based on neurophysiological evidence and focuses on the part of V1 responsible for contextual influences is presented. The proposed computational model successfully accounts for well known psychophysical effects for static contexts and also for brightness induction in dynamic contexts defined by modulating the luminance of surrounding areas. This work suggests that intra-cortical interactions in V1 could, at least partially, explain brightness induction effects and reveals how a common general architecture may account for several different fundamental processes, such as visual saliency and brightness induction, which emerge early in the visual processing pathway.
Ajuts:	Ministerio de Ciencia e Innovación TIN2010-21771-C02-01 Ministerio de Ciencia e Innovación TIN2010-21771-C02-02 Ministerio de Educación y Ciencia CSD 2007-00018
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	PloS one, Vol. 8, Issue 5 (May 2013) , art. e64086, ISSN 1932-6203

DOI: 10.1371/journal.pone.0064086
PMID: 23717536

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