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Proceedings Paper

Multispectral imaging of paintings: instrument and applications
Author(s): Claudio Bonifazzi; Pierluigi Carcagnì; Andrea Della Patria; Raffaella Fontana; Marinella Greco; Maria Mastroianni; Marzia Materazzi; Enrico Pampaloni; Luca Pezzati; Afra Romano
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Paper Abstract

In this paper we present a scanning device for multispectral imaging of paintings in the 380-800 nm spectral region; the system is based on a spectrophotometer for contact-less single-point measurements of the spectral reflectance with 10 nm resolution. Two orthogonal XY translation stages allow to scan up to 1,5 m2 with spatial resolution up to 8 dots/mm. As an application we present the results of the measurements carried out on Ritratto Trivulzio by Antonello da Messina and Madonna in gloria tra Santi by Andrea Mantegna. Besides spectra comparison also multivariate image analyses (MIA) have been performed by considering the multi-spectral images as three-way data set. In order to point out the slight spectral differences of two areas of a painting we analyzed its multispectral data cube by means of the Principal Component Analysis (PCA) and the K-Nearest-Neighbouring Cluster Analysis (KNN).

Paper Details

Date Published: 19 July 2007
PDF: 12 pages
Proc. SPIE 6618, O3A: Optics for Arts, Architecture, and Archaeology, 661816 (19 July 2007); doi: 10.1117/12.726113
Show Author Affiliations
Claudio Bonifazzi, Univ. of Ferrara (Italy)
Pierluigi Carcagnì, Istituto Nazionale di Ottica Applicata, CNR (Italy)
Andrea Della Patria, Istituto Nazionale di Ottica Applicata, CNR (Italy)
Raffaella Fontana, Istituto Nazionale di Ottica Applicata, CNR (Italy)
Marinella Greco, Istituto Nazionale di Ottica Applicata, CNR (Italy)
Maria Mastroianni, Istituto Nazionale di Ottica Applicata, CNR (Italy)
Marzia Materazzi, Istituto Nazionale di Ottica Applicata, CNR (Italy)
Enrico Pampaloni, Istituto Nazionale di Ottica Applicata, CNR (Italy)
Luca Pezzati, Istituto Nazionale di Ottica Applicata, CNR (Italy)
Afra Romano, Univ. of Ferrara (Italy)


Published in SPIE Proceedings Vol. 6618:
O3A: Optics for Arts, Architecture, and Archaeology
Costas Fotakis; Luca Pezzati; Renzo Salimbeni, Editor(s)

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