Multispectral imaging of paintings by optical scanning

Year: 2007

Authors: Carcagnì P., Della Patria A., Fontana R., Greco M., Mastroianni M., Materazzi M., Pampaloni E., Pezzati L.

Autors Affiliation: CNR – Istituto Nazionale di Ottica Applicata, Sezione di Lecce, Via Barsanti, 73010, Arnesano (Lecce), Italy;
CNR – Istituto Nazionale di Ottica Applicata, Largo E. Fermi 6, 50125, Firenze, Italy

Abstract: In the last few years, there has been a growing interest on multi-spectral imaging as non-destructive technique for painting diagnostics. Providing spectral and colorimetric characterization of the whole paint layer, such a technique is suitable to document the conservation state of an artwork. In this work we present a scanning system for multi-spectral imaging of paintings in the 380-800 nm spectral region, specifically developed to overcome most of the problems related to traditional detection systems based on CCD or Vidicon camera. The device is composed of a spectrometer for contact-less single-point spectral measurements, moved by two orthogonally mounted translation stages. It scans an area of I in 2 with 16 dots/mm(2) spatial resolution and 10 nm spectral resolution. Spectral reflection factor and tristimulus value measurements were carried out on coloured ceramic tiles and the results were compared to the corresponding certified values. We also present the first application to an ancient painting. (c) 2006 Elsevier Ltd. All rights reserved.

Journal/Review: OPTICS AND LASERS IN ENGINEERING

Volume: 45 (3)      Pages from: 360  to: 367

More Information: This research was partially supported by the Italian Ministry of Instruction, University and Research (MIUR) as a part of the project Integrated System for Diagnostics of Artistic Heritage (S.I.D.Art., Contract no.12828/SSPAR/2001). The authors are most grateful to Roberto Bellucci and Cecilia Frosinini (conservators at the Opificio delle Pietre Dure in Florence) for their contribution and valued advice as well as for giving us the possibility of a constant comparison to the conservation world.
KeyWords: multi-spectral imaging; scanning device; spectral reflection factor; colorimetric characterization; painting analysis
DOI: 10.1016/j.optlaseng.2005.02.010

Citations: 34
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