Innovative solutions for hyperspectral imaging in Art Conservation
A number of 50 researchers and expert in restoration have learnt about the applications of the hyperspectral cameras to the world of the art conservation and restoration.
Imaging in the VNIR (400-1000nm) and SWIR (900-2500nm) has a number of important and interesting applications for cultural heritage because it provides a more complete representation of the entire field of view. This is a critical distinction because true context is provided on what are typically heterogeneous objects; by comparison, point sensors can only sample discrete locations. Imaging in the VNIR has been used since the mid 1990s for texts and paintings (download flyer).
For texts, the application is typically content; for example, reading palimpsests and faded or damaged texts and maps. For art, the application is typically color and pigment mapping. SWIR imaging offers the possibility of chemical imaging, allowing the conservator to monitor and track chemistry changes over time.
Hyperspectral imagers offer scholars, curators and conservators unique advantages:
Enhance faded or hidden features-text/signatures
Detect restorations and repairs via chemical signature
Monitor and track changes of the object, or repairs and restorations
Identify local material components for proper repairs
Assess original coloring and pigmentation
Since little or no preparation of the document or artifact is necessary, this non-destructive spectral technique is invaluable for a wide range of conservation research relating to changes in color, chemical and substrates.
The morning session has been followed by a hands-on session. A Nano Hyperspec VNIR Sensor has been installed on a Laboratory Scanning Kit and several samples provided by the auditors have been acquired and analyzed.
The lecture "Spectral Imaging in Cultural Heritage" by David Bannon, President and CEO at Headwall Photonics, and the results of hands-on section can be download at the restricted area. Upon free registration, it will be possible to access all data and a free software tool to visualize the hypercubes. Please be aware that all these data are confidential information and they cannot be shared with third parties without authorization.
Thanks to Susanna Bracci (ICVBC-CNR) e Antonina Chaban (University of Padova Department of Cultural Heritage: archaelogy and History of Art, Cinema and Music) for making their samples available.
For enquiries about the Headwall hyperspectral sensors, please write to Francesco Beccari, European Sales Manager, firstname.lastname@example.org
ICVBC - AREA DI RICERCA CNR DI FIRENZE
Via Madonna del Piano, 10 - 50019 Sesto Fiorentino (FI)
Tel. 055 5225484 - Fax 0555225403
organized by Headwall Photonics (www.headwallphotonics.com).