Terahertz time-domain spectro-imaging and hyperspectral imagery to investigate a historical Longwy glazed ceramic
Idioma
en
Article de revue
Este ítem está publicado en
ISSI Scientific Reports Series. 2024-08-20, vol. 14, p. 19248
Springer
Resumen en inglés
In this paper, we present the potential of Terahertz Time-Domain Imaging (THz-TDI) as a tool to perform non-invasive 3D analysis of an ancient enamel plate made by Longwy Company in France. The THz data collected in the ...Leer más >
In this paper, we present the potential of Terahertz Time-Domain Imaging (THz-TDI) as a tool to perform non-invasive 3D analysis of an ancient enamel plate made by Longwy Company in France. The THz data collected in the reflection mode were processed using noise filtering procedures and an advanced imaging approach. The results validate the capability to identify glaze layers and the thickness of ceramic materials. To characterize the nature of the pigments, we also go with X-ray images, visible near-infrared hyperspectral imaging spectroscopy, and p-XRF (portable X-ray fluorescence) to qualitatively and quantitively identify the materials used. The information obtained made it possible to better understand the nature of the decoration chromogens and, thus, to determine the color palette of the artists who produced this type of decorative object. We also establish the efficiency of a focus, Z-tracker, which makes it possible to perform THz imaging on non-flat samples and to attenuate artifacts obtained with a short focus lens. Then, 3D images are extracted and generated, providing a real vision of the 3D object. We also report the evaluation of the internal damage state based on the detection of fractures.< Leer menos
Palabras clave en inglés
Earthenware
Polychrome glazes
Pigment
Ceramics
p-XRF
Hyperspectral imaging
Infrared false color
Terahertz imaging
Thickness
Fracture
Non-destructive analyses
Proyecto ANR
Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
Orígen
Importado de HalCentros de investigación