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Proceedings Paper

Systematic errors due to polynomial interpolation in digital image correlation: analysis of some interpolating kernels and experimental validation
Author(s): Antonio Baldi; Filippo Bertolino
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Paper Abstract

The accuracy of image correlation algorithms is severely affected by errors introduced by the interpolation step. This article surveys some of the most common interpolating and approximating kernels, focusing on the various sources of error-signal attenuation, phase errors and frequency spectrum-to identify the best performing algorithms. The results of the analysis are experimentally validated by comparing the Digital Image Correlation estimated displacements with the interferometric estimated values.

Paper Details

Date Published: 11 September 2012
PDF: 6 pages
Proc. SPIE 8413, Speckle 2012: V International Conference on Speckle Metrology, 841308 (11 September 2012); doi: 10.1117/12.978642
Show Author Affiliations
Antonio Baldi, Univ. degli Studi di Cagliari (Italy)
Filippo Bertolino, Univ degli Studi di Cagliari (Italy)

Published in SPIE Proceedings Vol. 8413:
Speckle 2012: V International Conference on Speckle Metrology
Ángel Fernandez Doval; Cristina Trillo, Editor(s)

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