Psychophysical Determination of the Relevant Colours That Describe the Colour Palette of Paintings
Metadatos
Afficher la notice complèteEditorial
MDPI
Materia
Colour Colour vision Painting
Date
2021Referencia bibliográfica
Nieves, J.L.; Ojeda, J.; Gómez-Robledo, L.; Romero, J. Psychophysical Determination of the Relevant Colours That Describe the Colour Palette of Paintings. J. Imaging 2021, 7, 72. https://doi.org/10.3390/ jimaging7040072
Patrocinador
FEDER Funds by the Spanish Ministry of Science Innovation and Universities (MICINN, grant number RTI2018-094738-B-I00)Résumé
In an early study, the so-called “relevant colour” in a painting was heuristically introduced
as a term to describe the number of colours that would stand out for an observer when just glancing
at a painting. The purpose of this study is to analyse how observers determine the relevant colours
by describing observers’ subjective impressions of the most representative colours in paintings and to
provide a psychophysical backing for a related computational model we proposed in a previous work.
This subjective impression is elicited by an efficient and optimal processing of the most representative
colour instances in painting images. Our results suggest an average number of 21 subjective colours.
This number is in close agreement with the computational number of relevant colours previously
obtained and allows a reliable segmentation of colour images using a small number of colours
without introducing any colour categorization. In addition, our results are in good agreement with
the directions of colour preferences derived from an independent component analysis. We show
that independent component analysis of the painting images yields directions of colour preference
aligned with the relevant colours of these images. Following on from this analysis, the results suggest
that hue colour components are efficiently distributed throughout a discrete number of directions
and could be relevant instances to a priori describe the most representative colours that make up the
colour palette of paintings.