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Article

Spectral Image Processing for Museum Lighting Using CIE LED Illuminants

1
Department of Optics, University of Granada, 18071 Granada, Spain
2
Faculty of Environment and Information Sciences, Yokohama National University, Kanagawa 240-8501, Japan
3
Department of Painting, University of Granada, 18071 Granada, Spain
*
Author to whom correspondence should be addressed.
Received: 4 November 2019 / Revised: 20 November 2019 / Accepted: 5 December 2019 / Published: 7 December 2019
(This article belongs to the Special Issue Color & Spectral Sensors)
This work presents a spectral color-imaging procedure for the detailed colorimetric study of real artworks under arbitrary illuminants. The results demonstrate this approach to be a powerful tool for art and heritage professionals when deciding which illumination to use in museums, or which conservation or restoration techniques best maintain the color appearance of the original piece under any illuminant. Spectral imaging technology overcomes the limitations of common area-based point-measurement devices such as spectrophotometers, allowing a local study either pixelwise or by selected areas. To our knowledge, this is the first study available that uses the proposed CIE (Commission Internationale de l’Éclairage) light-emitting diode (LED) illuminants in the context of art and heritage science, comparing them with the three main CIE illuminants A, D50, and D65. For this, the corresponding colors under D65 have been calculated using a chromatic adaptation transform analogous to the one in CIECAM02. For the sample studied, the CIE LED illuminants with the lowest average CIEDE2000 color differences from the standard CIE illuminants are LED-V1 for A and LED-V2 for D50 and D65, with 1.23, 1.07, and 1.57 units, respectively. The work studied is a Moorish epigraphic frieze of plasterwork with a tiled skirting from the Nasrid period (12th–15th centuries) exhibited in the Museum of the Alhambra (Granada, Spain). View Full-Text
Keywords: spectral imaging; colorimetry; hyperspectral line scanner; CIE illuminants; CIEDE2000 spectral imaging; colorimetry; hyperspectral line scanner; CIE illuminants; CIEDE2000
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MDPI and ACS Style

Martínez-Domingo, M.Á.; Melgosa, M.; Okajima, K.; Medina, V.J.; Collado-Montero, F.J. Spectral Image Processing for Museum Lighting Using CIE LED Illuminants. Sensors 2019, 19, 5400. https://0-doi-org.brum.beds.ac.uk/10.3390/s19245400

AMA Style

Martínez-Domingo MÁ, Melgosa M, Okajima K, Medina VJ, Collado-Montero FJ. Spectral Image Processing for Museum Lighting Using CIE LED Illuminants. Sensors. 2019; 19(24):5400. https://0-doi-org.brum.beds.ac.uk/10.3390/s19245400

Chicago/Turabian Style

Martínez-Domingo, Miguel Á., Manuel Melgosa, Katsunori Okajima, Víctor J. Medina, and Francisco J. Collado-Montero 2019. "Spectral Image Processing for Museum Lighting Using CIE LED Illuminants" Sensors 19, no. 24: 5400. https://0-doi-org.brum.beds.ac.uk/10.3390/s19245400

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