The contribution of luminance and chromatic channels to color assimilation
Otazu Porter, Xavier (Universitat Autònoma de Barcelona. Departament de Ciències de la Computació)
Cerdá Company, Xim (Centre de Visió per Computador (Bellaterra, Catalunya))

Data:	2022
Resum:	Color induction is the phenomenon where the physical and the perceived colors of an object differ owing to the color distribution and the spatial configuration of the surrounding objects. Previous works studying this phenomenon on the lsY MacLeod-Boynton color space, show that color assimilation is present only when the magnocellular pathway (i. e. , the Y axis) is activated (i. e. , when there are luminance differences). Concretely, the authors showed that the effect is mainly induced by the koniocellular pathway (s axis), but not by the parvocellular pathway (l axis), suggesting that when magnocellular pathway is activated it inhibits the koniocellular pathway. In the present work, we study whether parvo-, konio-, and magnocellular pathways may influence on each other through the color induction effect. Our results show that color assimilation does not depend on a chromatic-chromatic interaction, and that chromatic assimilation is driven by the interaction between luminance and chromatic channels (mainly the magno- and the koniocellular pathways). Our results also show that chromatic induction is greatly decreased when all three visual pathways are simultaneously activated, and that chromatic pathways could influence each other through the magnocellular (luminance) pathway. In addition, we observe that chromatic channels can influence the luminance channel, hence inducing a small brightness induction. All these results show that color induction is a highly complex process where interactions between the several visual pathways are yet unknown and should be studied in greater detail.
Ajuts:	Agencia Estatal de Investigación PID2020-115734RB-C21 Agencia Estatal de Investigación DPI2017-89867-C2-1-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-649
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Color vision ; Color assimilation ; Color induction ; Psychophysics ; Mutual inhibition
Publicat a:	Journal of Vision, Vol. 22, Issue 6 (May 2022) , art. 10, ISSN 1534-7362

DOI: 10.1167/jov.22.6.10
PMID: 35639404

15 p, 2.0 MB

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