Automated analysis of art object surfaces using time-averaged digital speckle pattern interferometry

Michal Lukomski; Leszek Krzemien

doi:10.1117/12.2020476

30 May 2013 Automated analysis of art object surfaces using time-averaged digital speckle pattern interferometry

Michal Lukomski, Leszek Krzemien

Proceedings Volume 8790, Optics for Arts, Architecture, and Archaeology IV; 87900Y (2013) https://doi.org/10.1117/12.2020476
Event: SPIE Optical Metrology 2013, 2013, Munich, Germany

Abstract

Technical development and practical evaluation of a laboratory built, out-of-plane digital speckle pattern interferometer (DSPI) are reported. The instrument was used for non-invasive, non-contact detection and characterization of early-stage damage, like fracturing and layer separation, of painted objects of art. A fully automated algorithm was developed for recording and analysis of vibrating objects utilizing continuous-wave laser light. The algorithm uses direct, numerical fitting or Hilbert transformation for an independent, quantitative evaluation of the Bessel function at every point of the investigated surface. The procedure does not require phase modulation and thus can be implemented within any, even the simplest, DSPI apparatus. The proposed deformation analysis is fast and computationally inexpensive. Diagnosis of physical state of the surface of a panel painting attributed to Nicolaus Haberschrack (a late-mediaeval painter active in Krakow) from the collection of the National Museum in Krakow is presented as an example of an in situ application of the developed methodology. It has allowed the effectiveness of the deformation analysis to be evaluated for the surface of a real painting (heterogeneous colour and texture) in a conservation studio where vibration level was considerably higher than in the laboratory. It has been established that the methodology, which offers automatic analysis of the interferometric fringe patterns, has a considerable potential to facilitate and render more precise the condition surveys of works of art.

Citation Download Citation

Michal Lukomski and Leszek Krzemien "Automated analysis of art object surfaces using time-averaged digital speckle pattern interferometry", Proc. SPIE 8790, Optics for Arts, Architecture, and Archaeology IV, 87900Y (30 May 2013); https://doi.org/10.1117/12.2020476

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available