Microscopy and Microanalysis

Analysis of Cultural Heritage Special Section

Multispectral Infrared Reflectography to Differentiate Features in Paintings

Claudia Daffaraa1 c1 and Raffaella Fontanaa1

a1 Istituto Nazionale di Ottica (CNR-INO), Largo E. Fermi 6, 50125 Florence, Italy

Abstract

Infrared reflectography is a well-known technique based on wideband imaging in the near-infrared (NIR) range used for painting diagnostics in conservation laboratories.. This work is focused on the application of multiband reflectography for analysis of pictorial layers and differentiated detection of painting features. This technique generates a set of narrowband NIR images of the painting. Starting from a dataset that is registered, metrically correct, and calibrated, the capability of collecting both spectral and spatial information has been exploited by processing the image cube with interplane techniques. Examples on artworks by Caravaggio, Veronese, Bronzino, and Schiavone are presented.

(Received September 30 2010)

(Accepted January 04 2011)

(Online publication April 08 2011)

Correspondence:

c1 Corresponding author. E-mail: claudia.daffara@ino.it