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Optimal subpixel interpolation in particle image velocimetry

Roesgen, T.

In: Experiments in Fluids, 2003, vol. 35, no. 3, p. 252-256

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    Titre
    • Optimal subpixel interpolation in particle image velocimetry
    Auteur
    • Roesgen, T.. Institute of Fluid Dynamics, Swiss Federal Institute of Technology, ETH Zentrum, Sonneggstrasse 3, 8092, Zurich, Switzerland
    Type de document
    • Postprint
    Classification
    • Technologie, Sciences de l'ingénieur
    Identifiant OAI-PMH
    • oai:doc.rero.ch:318320
    Summary
    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