Infrared exploration of the architectural heritage: From passive infrared thermography to hybrid infrared thermography (HIRT) approach

S. Sfarra, E. Marcucci, D. Ambrosini, D. Paoletti

Research output: Contribution to journalArticle

16 Citations (Scopus)


Up to now, infrared thermographic approaches have been considered either passive or active. In the latter case, the heat flux is historically attributed to a non-natural heat source. The use of the sun has recently been incorporated into the active approach thanks to multi-temporal inspections. In this paper, an innovative hybrid thermographic (HIRT) approach is illustrated. It combines both the time component and the solar source to obtain quantitative information such as the defect depth. Thermograms were obtained by inspecting the facade of the Santa Maria Collemaggio church (L'Aquila, Italy), whereas quantitative results related to the sub-superficial discontinuities were obtained thanks to the use of advanced techniques. Experimental results linked to passive approach (i.e., the mosaicking procedure of the thermograms) performed by selecting a set of historic churches are also included in order to explain, when and where, the hybrid procedure should be used.

Original languageEnglish
Article numbere094
JournalMateriales de Construccion
Issue number323
Publication statusPublished - 1 Jul 2016
Externally publishedYes



  • Image Analysis
  • Limestone
  • Physical Properties
  • Temperature
  • Thermal Analysis

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)
  • Mechanics of Materials

Cite this