Application of Reflectance Transformation Imaging for Visualizing Early Signs of Corrosion in Historical Glass Corrosion

• DOI: 10.2352/issn.2168-3204.2023.20.1.30
• Publication Date: 2023-08-31T10:38:22Z
• Authors: Deepshikha Sharma; Marvin Nurit; Ulrike Rothenhäusler; Katharina Schmidt...; Edith Joseph; Sony George; Tiziana Lombardo
• Keywords: Characterization; RGB color model; Position (finance)

Reflectance Transformation Imaging (RTI) is a multi-light imaging technique using camera on fixed position and orthogonal to the studied surface, while varying light for each image captured. This allows reconstruction of surface's visual appearance characterization surface by providing additional information deformations local micro-geometry. RTI was applied historical model glass corroded in presence volatile organic compounds (VOCs) visualize early stages corrosion. used create relighting visualizations generate maps based statistical descriptors derived from reflectance distribution pixels. Selected were able assist quantification corrosion signs i.e., fine cracks salt neocrystallizations (SN), more global scale as compared digital microscopy (DM). Therefore, could provide an solution transparent colourless surfaces, which not be visualized simple RGB photography neither with transmitted nor reflected light.