TY - JOUR
T1 - High-Resolution Ultrasonic Imaging of Artworks with Seismic Interferometry for Their Conservation and Restoration
AU - Draganov, Deyan
AU - Hunziker, Jürg
AU - Heller, Karel
AU - Gutkowski, Karin
AU - Marte, Fernando
PY - 2018/2/22
Y1 - 2018/2/22
N2 - Artworks are an inseparable part of the cultural heritage of societies and provide us with a unique look at cultural developments through time and space. For the best possible conservation, it is paramount to know the constituent materials, condition, and construction techniques of the objects (e.g. painting on wood, fresco, sculpture). Such information is required not only for the surfaces of the objects, but also for the interiors; in the imaging discipline, this is known as depth imaging. Here, we introduce a new method for non-invasive depth imaging as an alternative to traditional non-invasive methods when the latter cannot be used to obtain the required information. We use ultrasonic transverse-wave transmission measurements and turn them into virtual reflection measurements. We achieve this by applying seismic interferometry with active sources. Obtaining reflection measurements by seismic interferometry allows us to apply an advanced imaging technique – prestack depth migration, as used in seismic exploration – to produce a high-resolution depth image of an object. We apply our method to ultrasonic data recorded on a mockup of a painting on a wooden support. We validate our method by comparing our results with an image from X-ray computed tomography.
AB - Artworks are an inseparable part of the cultural heritage of societies and provide us with a unique look at cultural developments through time and space. For the best possible conservation, it is paramount to know the constituent materials, condition, and construction techniques of the objects (e.g. painting on wood, fresco, sculpture). Such information is required not only for the surfaces of the objects, but also for the interiors; in the imaging discipline, this is known as depth imaging. Here, we introduce a new method for non-invasive depth imaging as an alternative to traditional non-invasive methods when the latter cannot be used to obtain the required information. We use ultrasonic transverse-wave transmission measurements and turn them into virtual reflection measurements. We achieve this by applying seismic interferometry with active sources. Obtaining reflection measurements by seismic interferometry allows us to apply an advanced imaging technique – prestack depth migration, as used in seismic exploration – to produce a high-resolution depth image of an object. We apply our method to ultrasonic data recorded on a mockup of a painting on a wooden support. We validate our method by comparing our results with an image from X-ray computed tomography.
KW - artefacts
KW - artworks
KW - conservation
KW - imaging
KW - restoration
KW - Seismic interferometry
KW - transverse waves
KW - ultrasonic
UR - http://www.scopus.com/inward/record.url?scp=85042216113&partnerID=8YFLogxK
UR - http://resolver.tudelft.nl/uuid:08605389-06c6-42d7-b479-127bc1bb6a2b
U2 - 10.1080/00393630.2018.1437870
DO - 10.1080/00393630.2018.1437870
M3 - Article
AN - SCOPUS:85042216113
SN - 0039-3630
VL - 63
SP - 277
EP - 291
JO - Studies in Conservation
JF - Studies in Conservation
IS - 5
ER -