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Optimal subpixel interpolation in particle image velocimetry

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Abstract

It is shown that among the different techniques for particle image velocimetry subpixel interpolation, only the "sinc"-kernel creates an optimal result in that it completely suppresses spurious spectral sidelobes. An efficient method is introduced for the computation of the subpixel-accurate correlation peak position without any systematic errors. A connection is made with the kernel-dependent observation of the peak-locking phenomenon.

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  1. Institute of Fluid Dynamics, Swiss Federal Institute of Technology, ETH Zentrum, Sonneggstrasse 3, 8092, Zurich, Switzerland

    T. Roesgen

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  1. T. Roesgen
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Correspondence to T. Roesgen.

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Roesgen, T. Optimal subpixel interpolation in particle image velocimetry. Exp Fluids 35, 252–256 (2003). https://doi.org/10.1007/s00348-003-0627-8

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  • DOI: https://doi.org/10.1007/s00348-003-0627-8

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