Electronic speckle pattern interferometry applied to the study and conservation of paintings

Lucia, A.C.; Zanetta, P.; Facchini, M.

doi:10.1016/0143-8166(95)00114-x

Cited by 18 publications

(4 citation statements)

References 5 publications

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“…It is then clear that, from an operational point of view, ESPI is faster and simpler to use than conventional holography. ESPI has proved to be a very attractive tool, especially for in situ investigation on frescoes, wooden panels and museum objects [20,21,22,23,24,25,26] as well as on different artworks such as mosaics [27], canvas [28], and terracotta warriors [29]. ESPI can also be used to monitor the artwork conditions over time as well as the effect of sunshine on frescoes [30].…”

Section: Non-destructive Testing (Ndt) Techniques Appliedmentioning

confidence: 99%

Discovering the mysteries of the Santa Maria di Collemaggio Church (L''Aquila, Italy) by non-destructive testing techniques

Sfarra¹,

Bendada²,

Ibarra-Castanedo³

et al. 2012

Proceedings of the 2012 International Conference on Quantitative InfraRed Thermography

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In this study an ancient fresco (Incoronazione dell'Assunta, 15 th century) in the Santa Maria di Collemaggio Church (L'Aquila, Italy) containing real damage due to the earthquake of April 2009, which seriously damaged the structure, was inspected by active InfraRed Thermography (IRT) and Near-InfraRed (NIR) Reflectography. On the other hand, the fresco's condition prior to the earthquake was analyzed by Electronic Speckle Pattern Interferometry (ESPI) and Digital Speckle Correlation (DSC). Thermographic inspection data was processed using Principal Component Thermography (PCT) and Pulsed Phase Thermography (PPT), in order to improve the signature of the defects and to reduce the impact of non-uniform heating and emissivity variations due to the painting's pigments. This work also shows that the integration of the non-destructive techniques mentioned above, constitutes an interesting alternative for the in situ inspection of frescoes without impairing their integrity. On the sidelines of the discussion are also reported further analysis by IRT and Ground Penetrating Radar (GPR), which helped to fill gaps in the construction history of the original Church.

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Section: Non-destructive Testing (Ndt) Techniques Appliedmentioning

confidence: 99%

Discovering the mysteries of the Santa Maria di Collemaggio Church (L''Aquila, Italy) by non-destructive testing techniques

Sfarra¹,

Bendada²,

Ibarra-Castanedo³

et al. 2012

Proceedings of the 2012 International Conference on Quantitative InfraRed Thermography

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“…Another group based in Italy [42] investigated the use of ESPI to monitor panel paintings. Three wooden panels were examined and displacements induced by heating the surface of paintings for two seconds using an infrared lamp.…”

Section: Holographic and Electronic Speckle Pattern Interferometrymentioning

confidence: 99%

Deformation and strain measurement techniques for the inspection of damage in works of art

Dulieu-Barton¹,

Dokos²,

Eastop³

et al. 2005

Studies in Conservation

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The engineering techniques used for inspecting structural damage are not widely known in the conservation sector. Techniques are available based on deformation or strain measurement that have the ability to provide quantitative data. This paper reviews currently available techniques, covering point-strain measurements using resistance strain gauges and fibre-optic sensors, as well as full-field optical measurement approaches such as holography, electronic speckle pattern interferometry, photoelastic stress analysis and photogrammetry. The underlying technology of each of the techniques is described for the non-specialist. The relevance of each technique is established from a conservation perspective through accounts of usage. The application of the techniques to a wide range of artwork, including panel paintings, statues, murals and mosaics is described and the results critically reviewed. The paper also provides an insight into possible future applications of the techniques and identifies areas for further investigation.

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“…Speckle metrology, in short, allows measuring the object deformations by acquiring and analyzing a sequence of speckle patterns. The ESPI technique is based on a two-beam configuration similar to holographic interferometry (as such, it is highly sensitive, up to sub-micron scale) and has found advantageous applications in the conservation field [ 8 , 13 , 15 , 28 , 29 , 30 ]. The SPP technique, conversely, is performed without the reference beam, by acquiring the speckle intensity pattern generated by the object beam alone.…”

Section: Introductionmentioning

confidence: 99%

A Portable Compact System for Laser Speckle Correlation Imaging of Artworks Using Projected Speckle Pattern

Daffara

Marini

2020

J. Imaging

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Artworks have a layered structure subjected to alterations caused by various factors. The monitoring of defects at sub-millimeter scale may be performed by laser interferometric techniques. The aim of this work was to develop a compact system to perform laser speckle imaging in situ for effective mapping of subsurface defects in paintings. The device was designed to be versatile with the possibility of optimizing the performance by easy parameters adjustment. The system exploits a laser speckle pattern generated through an optical diffuser and projected onto the artworks and image correlation techniques for the analysis of the speckle intensity pattern. A protocol for the optimal measurement was suggested, based on calibration curves for tuning the mean speckle size in the acquired intensity pattern. The system was validated in the analysis of detachments in an ancient painting model using a short pulse thermal stimulus to induce a surface deformation field and standard decorrelation algorithms for speckle pattern matching. The device is equipped with a compact thermal camera for preventing any overheating effects during the phase of the stimulus. The developed system represents a valuable nondestructive tool for artwork diagnostics, allowing the monitoring of subsurface defects in paintings in out-of-laboratory environment.

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Electronic speckle pattern interferometry applied to the study and conservation of paintings

Cited by 18 publications

References 5 publications

Discovering the mysteries of the Santa Maria di Collemaggio Church (L''Aquila, Italy) by non-destructive testing techniques

Discovering the mysteries of the Santa Maria di Collemaggio Church (L''Aquila, Italy) by non-destructive testing techniques

Deformation and strain measurement techniques for the inspection of damage in works of art

A Portable Compact System for Laser Speckle Correlation Imaging of Artworks Using Projected Speckle Pattern

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