Investigation of the influence of spatial degrees of freedom on thermal infrared measurement

Julien R. Fleuret, Bardia Yousefi, Lei Lei, Frank Billy Djupkep Dizeu, Hai Zhang, Stefano Sfarra, Denis Ouellet, Xavier P.V. Maldague

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Long Wavelength Infrared (LWIR) cameras can provide a representation of a part of the light spectrum that is sensitive to temperature. These cameras also named Thermal Infrared (TIR) cameras are powerful tools to detect features that cannot be seen by other imaging technologies. For instance they enable defect detection in material, fever and anxiety in mammals and many other features for numerous applications. However, the accuracy of thermal cameras can be affected by many parameters; the most critical involves the relative position of the camera with respect to the object of interest. Several models have been proposed in order to minimize the influence of some of the parameters but they are mostly related to specific applications. Because such models are based on some prior informations related to context, their applicability to other contexts cannot be easily assessed. The few models remaining are mostly associated with a specific device. In this paper the authors studied the influence of the camera position on the measurement accuracy. Modeling of the position of the camera from the object of interest depends on many parameters. In order to propose a study which is as accurate as possible, the position of the camera will be represented as a five dimensions model. The aim of this study is to investigate and attempt to introduce a model which is as independent from the device as possible.

Original languageEnglish
Title of host publicationThermosense
Subtitle of host publicationThermal Infrared Applications XXXIX
ISBN (Electronic)9781510609297
Publication statusPublished - 2017
Externally publishedYes
EventThermosense: Thermal Infrared Applications XXXIX 2017 - Anaheim, United States
Duration: 10 Apr 201713 Apr 2017


ConferenceThermosense: Thermal Infrared Applications XXXIX 2017
CountryUnited States


  • defocus
  • modeling
  • Thermal Infrared
  • thermal parametric modeling

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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