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Relationship between reflectance and degree of polarization in the VNIR-SWIR: A case study on art paintings with polarimetric reflectance imaging spectroscopy.
Grillini, Federico; Aksas, Lyes; Lapray, Pierre-Jean; Foulonneau, Alban; Thomas, Jean-Baptiste; George, Sony; Bigué, Laurent.
Affiliation
  • Grillini F; Department of Computer Science, Norwegian University of Science and Technology, Gjøvik, Norway.
  • Aksas L; IRIMAS, EA7499, Université de Haute-Alsace, Mulhouse, France.
  • Lapray PJ; IRIMAS, EA7499, Université de Haute-Alsace, Mulhouse, France.
  • Foulonneau A; IRIMAS, EA7499, Université de Haute-Alsace, Mulhouse, France.
  • Thomas JB; Department of Computer Science, Norwegian University of Science and Technology, Gjøvik, Norway.
  • George S; ImViA Laboratory-Université de Bourgogne, Dijon, France.
  • Bigué L; Department of Computer Science, Norwegian University of Science and Technology, Gjøvik, Norway.
PLoS One ; 19(5): e0303018, 2024.
Article in En | MEDLINE | ID: mdl-38722909
ABSTRACT
We study the relationship between reflectance and the degree of linear polarization of radiation that bounces off the surface of an unvarnished oil painting. We design a VNIR-SWIR (400 nm to 2500 nm) polarimetric reflectance imaging spectroscopy setup that deploys unpolarized light and allows us to estimate the Stokes vector at the pixel level. We observe a strong negative correlation between the S0 component of the Stokes vector (which can be used to represent the reflectance) and the degree of linear polarization in the visible interval (average -0.81), while the correlation is weaker and varying in the infrared range (average -0.50 in the NIR range between 780 and 1500 nm, and average -0.87 in the SWIR range between 1500 and 2500 nm). By tackling the problem with multi-resolution image analysis, we observe a dependence of the correlation on the local complexity of the surface. Indeed, we observe a general trend that strengthens the negative correlation for the effect of artificial flattening provoked by low image resolutions.
Subject(s)

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Paintings Language: En Journal: PLoS One Journal subject: CIENCIA / MEDICINA Year: 2024 Document type: Article Affiliation country: Country of publication:

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Paintings Language: En Journal: PLoS One Journal subject: CIENCIA / MEDICINA Year: 2024 Document type: Article Affiliation country: Country of publication: