Revealing inscriptions obscured by time on an early-modern lead funerary cross using terahertz multispectral imaging
Junliang Dong|Ana C.F. Ribeiro|Aurélien Vacheret|Alexandre Locquet|D. S. Citrin
Abstract The presence of a corrosion layer on lead art and archæological objects can severely impede the interpretation inscriptions, thus hampering our overall understanding object its context. While oxidation that dominates may be chemically reversible via reduction, potentially providing some access to inscriptions otherwise obscured by time, damage is neither entirely nor reduction process in all cases easy or feasible carry out. In this study, taking advantage unique penetration ability terahertz radiation abundant frequency bands covered single-cycle pulse, we perform nondestructive multispectral imaging look under sixteenth century funerary cross ( croix d’absolution ) from Remiremont Lorraine, France. images obtained various are fed into judiciously designed post-processing chain for image restoration enhancement, allowing us first time read might have been lost. Our approach, which brings together new way THz properties constituent materials advanced signal- image-processing techniques, opens up perspectives multi-resolution analysis at frequencies as technique archæometry will ultimately provide unprecedented information digital acquisition documentation, character extraction, classification, recognition studies.
Scientific Reports|HAL (Le Centre pour la Communication Scientifique Directe)|DOAJ (DOAJ: Directory of Open Access Journals)|HAL (Le Centre pour la Communication Scientifique Directe)|HAL (Le Centre pour la Communication Scientifique Directe)|HAL (Le Centre pour la Communication Scientifique Directe)|PubMed Central|PubMed