1 March 1990 Automatic thermal reference detection in thermographic images
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Abstract
The use of infrared imaging equipment for surface temperature measurements requires the knowledge of parameters such as object emissivity, temperature of the object surroundings and atmospheric transmittivity. The last two parameters can be evaluated from the gray levels of a thermal reference put into the scene. Accurate identification of the pixels belonging to the thermal reference but not to the investigated objects or background has been so far performed by a human operator. Full automation of such a task is highly desirable in actual practice, especially in applications involving a large numbers of thermograms or sequences of them. This work presents a method for the automatic detection of a Ohman thermal reference in digitized thermograms. The thermographic applications of the procedure, including automatic measurements of surface temperature and thermal parameters, are also described.
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Paolo Giulio Bison, Paolo Giulio Bison, Guido Maria Cortelazzo, Guido Maria Cortelazzo, Ermanno G. Grinzato, Ermanno G. Grinzato, Piergiorgio Svaizer, Piergiorgio Svaizer, } "Automatic thermal reference detection in thermographic images", Proc. SPIE 1313, Thermosense XII: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (1 March 1990); doi: 10.1117/12.21946; https://doi.org/10.1117/12.21946
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