Infrared thermographic nondestructive testing of frescos: Thermal modeling and image processing of three dimensional heat diffusion phenomena

V. Vavilov, S. Marinetti, E. Grinzato, P. G. Bison, S. Dal Toè, D. Burleigh

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A method for thermographic testing of ancient wall frescos is described. Experimental results were obtained by testing the Fogolino fresco in Bergamo, Italy, using a transient thermal nondestructive testing technique. It was found that the main difficulties in testing the fresco were caused by nonuniform surface patterns in both the optical and infrared (thermal) wavelength ranges. This multiwavelength surface clutter leads to numerous artifacts when applying sophisticated data processing algorithms such as dynamic thermal tomography. A three dimensional data filtering technique is proposed that will take into account both uneven heating and lateral heat diffusion, thus diminishing the effect of surface clutter.

Original languageEnglish
Pages (from-to)452-460
Number of pages9
JournalMaterials Evaluation
Volume60
Issue number3
Publication statusPublished - 2002

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Keywords

  • Discontinuity characterization
  • Fresco
  • Infrared thermography
  • Lateral heat diffusion
  • Nondestructive testing
  • Thermal tomography

ASJC Scopus subject areas

  • Materials Science (miscellaneous)

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