Global mapping of stratigraphy of an old-master painting using sparsity-based terahertz reflectometry

Abstract The process by which art paintings are produced typically involves the successive applications of preparatory and paint layers to a canvas or other support; however, there is an absence of nondestructive modalities to provide a global mapping of the stratigraphy, information that is crucial...

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Autores principales:	Junliang Dong, Alexandre Locquet, Marcello Melis, D. S. Citrin
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f5e816e3fe3140ef9de7767d7d0afcca
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spelling	oai:doaj.org-article:f5e816e3fe3140ef9de7767d7d0afcca2021-12-02T15:06:20ZGlobal mapping of stratigraphy of an old-master painting using sparsity-based terahertz reflectometry10.1038/s41598-017-15069-22045-2322https://doaj.org/article/f5e816e3fe3140ef9de7767d7d0afcca2017-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-15069-2https://doaj.org/toc/2045-2322Abstract The process by which art paintings are produced typically involves the successive applications of preparatory and paint layers to a canvas or other support; however, there is an absence of nondestructive modalities to provide a global mapping of the stratigraphy, information that is crucial for evaluation of its authenticity and attribution, for insights into historical or artist-specific techniques, as well as for conservation. We demonstrate sparsity-based terahertz reflectometry can be applied to extract a detailed 3D mapping of the layer structure of the 17th century easel painting Madonna in Preghiera by the workshop of Giovanni Battista Salvi da Sassoferrato, in which the structure of the canvas support, the ground, imprimatura, underpainting, pictorial, and varnish layers are identified quantitatively. In addition, a hitherto unidentified restoration of the varnish has been found. Our approach unlocks the full promise of terahertz reflectometry to provide a global and detailed account of an easel painting’s stratigraphy by exploiting the sparse deconvolution, without which terahertz reflectometry in the past has only provided a meager tool for the characterization of paintings with paint-layer thicknesses smaller than 50 μm. The proposed modality can also be employed across a broad range of applications in nondestructive testing and biomedical imaging.Junliang DongAlexandre LocquetMarcello MelisD. S. CitrinNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Junliang Dong Alexandre Locquet Marcello Melis D. S. Citrin Global mapping of stratigraphy of an old-master painting using sparsity-based terahertz reflectometry
description	Abstract The process by which art paintings are produced typically involves the successive applications of preparatory and paint layers to a canvas or other support; however, there is an absence of nondestructive modalities to provide a global mapping of the stratigraphy, information that is crucial for evaluation of its authenticity and attribution, for insights into historical or artist-specific techniques, as well as for conservation. We demonstrate sparsity-based terahertz reflectometry can be applied to extract a detailed 3D mapping of the layer structure of the 17th century easel painting Madonna in Preghiera by the workshop of Giovanni Battista Salvi da Sassoferrato, in which the structure of the canvas support, the ground, imprimatura, underpainting, pictorial, and varnish layers are identified quantitatively. In addition, a hitherto unidentified restoration of the varnish has been found. Our approach unlocks the full promise of terahertz reflectometry to provide a global and detailed account of an easel painting’s stratigraphy by exploiting the sparse deconvolution, without which terahertz reflectometry in the past has only provided a meager tool for the characterization of paintings with paint-layer thicknesses smaller than 50 μm. The proposed modality can also be employed across a broad range of applications in nondestructive testing and biomedical imaging.
format	article
author	Junliang Dong Alexandre Locquet Marcello Melis D. S. Citrin
author_facet	Junliang Dong Alexandre Locquet Marcello Melis D. S. Citrin
author_sort	Junliang Dong
title	Global mapping of stratigraphy of an old-master painting using sparsity-based terahertz reflectometry
title_short	Global mapping of stratigraphy of an old-master painting using sparsity-based terahertz reflectometry
title_full	Global mapping of stratigraphy of an old-master painting using sparsity-based terahertz reflectometry
title_fullStr	Global mapping of stratigraphy of an old-master painting using sparsity-based terahertz reflectometry
title_full_unstemmed	Global mapping of stratigraphy of an old-master painting using sparsity-based terahertz reflectometry
title_sort	global mapping of stratigraphy of an old-master painting using sparsity-based terahertz reflectometry
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/f5e816e3fe3140ef9de7767d7d0afcca
work_keys_str_mv	AT junliangdong globalmappingofstratigraphyofanoldmasterpaintingusingsparsitybasedterahertzreflectometry AT alexandrelocquet globalmappingofstratigraphyofanoldmasterpaintingusingsparsitybasedterahertzreflectometry AT marcellomelis globalmappingofstratigraphyofanoldmasterpaintingusingsparsitybasedterahertzreflectometry AT dscitrin globalmappingofstratigraphyofanoldmasterpaintingusingsparsitybasedterahertzreflectometry
_version_	1718388555129028608

Global mapping of stratigraphy of an old-master painting using sparsity-based terahertz reflectometry

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