Correction of thermographic images based on the minimization method of Tikhonov functional
DOI:
https://doi.org/10.2298/YJOR211015026BKeywords:
Termogram, Ill-posed problem, Inverse problem, Cauchy problem for the Laplace equation, Integral equation of the first kind, Tikhonov regularization methodAbstract
The paper considers the method of correction of thermographic images (thermograms) obtained by recording in the infrared range of radiation from the surface of the object under study using a thermal imager. A thermogram with a certain degree of reliability transmits an image of the heat-generating structure inside the body. In this paper, the mathematical correction of images on a thermogram is performed based on an analytical continuation of the stationary temperature distribution as a harmonic function from the surface of the object under study towards the heat sources. The continuation is carried out by solving an ill-posed mixed problem for the Laplace equation in a cylindrical region of rectangular cross-section. To construct a stable solution to the problem, the principle of the minimum of the Tikhonov smoothing functional we used.References
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