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Article

Psychophysical Determination of the Relevant Colours That Describe the Colour Palette of Paintings

Department of Optics, Faculty of Science, University of Granada, 18071 Granada, Spain
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Author to whom correspondence should be addressed.
Academic Editors: Raimondo Schettini, Vien Cheung, Jean-Baptiste Thomas and Peter Rhodes
Received: 5 February 2021 / Revised: 10 April 2021 / Accepted: 13 April 2021 / Published: 14 April 2021
(This article belongs to the Special Issue Advances in Color Imaging)
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. View Full-Text
Keywords: colour; colour vision; paintings colour; colour vision; paintings
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MDPI and ACS Style

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://0-doi-org.brum.beds.ac.uk/10.3390/jimaging7040072

AMA Style

Nieves JL, Ojeda J, Gómez-Robledo L, Romero J. Psychophysical Determination of the Relevant Colours That Describe the Colour Palette of Paintings. Journal of Imaging. 2021; 7(4):72. https://0-doi-org.brum.beds.ac.uk/10.3390/jimaging7040072

Chicago/Turabian Style

Nieves, Juan L., Juan Ojeda, Luis Gómez-Robledo, and Javier Romero. 2021. "Psychophysical Determination of the Relevant Colours That Describe the Colour Palette of Paintings" Journal of Imaging 7, no. 4: 72. https://0-doi-org.brum.beds.ac.uk/10.3390/jimaging7040072

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