Infrared thermography: philosophy, approaches, analysis—processing, and guidelines

Ranjit Shrestha, Morteza Moradi, Stefano Sfarra, Wontae Kim

Research output: Chapter in Book/Conference proceedings/Edited volumeChapterScientificpeer-review


The infrared thermography (IRT) technique has shown great potential with many applications in a variety of fields, such as aerospace, petroleum, civil engineering, and so forth. This chapter is designed to provide an overview of the method of IRT in non-destructive material evaluation. It begins with the general introduction and development of the IRT. It follows the basic principles of the electromagnetic spectrum and radiative energy concepts. Following the introduction of different types of thermography, applications in the non-destructive testing fields are provided. The next section focuses on recent trends and developments, in particular the integration of IRT with other technologies namely ultrasonic, acoustic emission, and so on. By assigning a data analysis section, data processing techniques are described by dividing them into two conventional and advanced categories. The numerical modeling and simulation of the IRT inspection process are then presented as beneficial applications. In addition, the relevant standards have been specified in a short separate section. To testify to the effectiveness of the IRT, a case study of a steel sample inspection is provided at the end of the chapter itself.

Original languageEnglish
Title of host publicationNon-Destructive Material Characterization Methods
Number of pages31
ISBN (Electronic)9780323911504
ISBN (Print)9780323984782
Publication statusPublished - 2023

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.


  • examples of inspections
  • infrared thermography (IRT)
  • material evaluation
  • non-destructive testing (NDT)
  • numerical modeling
  • thermal infrared radiation


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