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Just published
Our paper is a first attempt to study depicted light💡at scale in paintings. Authored by Pepe Ballesteros Zapata in collaboration with Leonardo Impett and Darío Negueruela del Castillo.
You can read it here : https://library.imaging.org/ei/articles/36/14/CVAA-176
Cite this article
Pepe Ballesteros Zapata, Darı́o Negueruela del Castillo, Leonardo Impett, “Light Analysis of Paintings at Scale Using Spherical Harmonics” in Electronic Imaging, 2024, pp 176-1 – 176-7, https://doi.org/10.2352/EI.2024.36.14.CVAA-176
Abstract
Light is abstract. Light is difficult to describe with words. Unlike other pictorial motifs such as perspective, light depiction eludes fixed rules and defies straightforward measurement. This study presents a preliminary step towards measuring light infor- mation from paintings at scale. We use spherical harmonics to extract light environment features from depicted faces. Our initial evaluation assessed the model’s ability to accurately represent environmental lighting, using natural images with ground truth lighting information. To evaluate performance on paintings on a large-scale setting, we compare our light direction estimates with human annotations over the course of five centuries. Finally, our methodology undergoes validation through an art historical case study. We track the use of diffuse light across seventeenth- century Netherlandish portrait painting to commensurate art his- torical literature with our quantitative measures.
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