Digital processing of interferograms obtained by the photoelasticity method

A. N. Kosygin ; L. N. Kosygina

Vestnik Samarskogo universiteta. Estestvennonaučnaâ seriâ, Tome 25 (2019) no. 2, pp. 75-91

Résumé

The article is devoted to the digital processing interferograms (isochromatic fringe patterns) obtained by the photoelasticity method. An application to interpretate the isochromatic fringe patterns is developed. It allows us to automate this procedure, gets to avoid the routine and time-consuming work. The features of the developed software package are described in detail by means of the classic problem of a diametrically compressed disk. The application's algorithm includes following main steps: image pre-processing, localization interference fringe, fringe tracing. The application creates a text file containing all the necessary data to further determine the stress-strain state (isochromatic fringe's number and locus of fringes).

Détail

Keywords: digital image processing, photoelasticity method, isochromatic interferogram, interference fringe pattern, isochromatic fringe, pixel-by-pixel scanning, preprocessing images, fringe tracing, fringe localization, fringe pattern's skeleton, median filter, Gaussian filter, convolutional type filter.

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