Share Email Print
cover

Proceedings Paper

Mid-infrared thermal imaging for an effective mapping of surface materials and sub-surface detachments in mural paintings: integration of thermography and thermal quasi-reflectography
Author(s): C. Daffara; S. Parisotto; P. I. Mariotti
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Cultural Heritage is discovering how precious is thermal analysis as a tool to improve the restoration, thanks to its ability to inspect hidden details. In this work a novel dual mode imaging approach, based on the integration of thermography and thermal quasi-reflectography (TQR) in the mid-IR is demonstrated for an effective mapping of surface materials and of sub-surface detachments in mural painting. The tool was validated through a unique application: the “Monocromo” by Leonardo da Vinci in Italy. The dual mode acquisition provided two spatially aligned dataset: the TQR image and the thermal sequence. Main steps of the workflow included: 1) TQR analysis to map surface features and 2) to estimate the emissivity; 3) projection of the TQR frame on reference orthophoto and TQR mosaicking; 4) thermography analysis to map detachments; 5) use TQR to solve spatial referencing and mosaicking for the thermal-processed frames. Referencing of thermal images in the visible is a difficult aspect of the thermography technique that the dual mode approach allows to solve in effective way. We finally obtained the TQR and the thermal maps spatially referenced to the mural painting, thus providing the restorer a valuable tool for the restoration of the detachments.

Paper Details

Date Published: 30 June 2015
PDF: 12 pages
Proc. SPIE 9527, Optics for Arts, Architecture, and Archaeology V, 95270I (30 June 2015); doi: 10.1117/12.2184836
Show Author Affiliations
C. Daffara, Univ. of Verona (Italy)
S. Parisotto, Univ. of Cambridge (United Kingdom)
P. I. Mariotti, Opificio delle Pietre Dure (Italy)


Published in SPIE Proceedings Vol. 9527:
Optics for Arts, Architecture, and Archaeology V
Luca Pezzati; Piotr Targowski, Editor(s)

© SPIE. Terms of Use
Back to Top