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arXiv · 1310.0725

Demodulation of spatial carrier images : performance analysis of several algorithms using a single image

Claudiu Badulescu·M. Bornert·J. C. Dupré·P. Esquis·Michel Grediac·Jérôme Molimard·Pascal Picart·René Rotinat·Valéry Valle
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Abstract

Optical full-field techniques have a great importance in modern experimental mechanics. Even if they are reasonably spread among the university laboratories, their diffusion in industrial companies remains very narrow for several reasons, especially a lack of metrological performance assessment. A full-field measurement can be characterized by its resolution, bias, measuring range, and by a specific quantity, the spatial resolution. The present paper proposes an original procedure to estimate in one single step the resolution, bias and spatial resolution for a given operator (decoding algorithms such as image correlation, low-pass filters, derivation tools ...). This procedure is based on the construction of a particular multi-frequential field, and a Bode diagram representation of the results. This analysis is applied to various phase demodulating algorithms suited to estimate in-plane displacements

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Claudiu Badulescu, M. Bornert, J. C. Dupré, P. Esquis, Michel Grediac, Jérôme Molimard, Pascal Picart, René Rotinat, Valéry Valle. 2013-10-02. Demodulation of spatial carrier images : performance analysis of several algorithms using a single image. https://doi.org/10.1007/s11340-013-9741-6

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