Experiments in Fluids

, Volume 38, Issue 4, pp 511–515

Two-dimensional Gaussian regression for sub-pixel displacement estimation in particle image velocimetry or particle position estimation in particle tracking velocimetry


DOI: 10.1007/s00348-005-0942-3

Cite this article as:
Nobach, H. & Honkanen, M. Exp Fluids (2005) 38: 511. doi:10.1007/s00348-005-0942-3


An explicit solution of two-dimensional Gaussian regression for the estimation of particle displacement from the correlation function in particle image velocimetry (PIV) or particle position from the images in particle tracking velocimetry (PTV) with sub-pixel accuracy is introduced. The accuracy and the ability of the methods to avoid pixel locking due to non-axially orientated, elliptically shaped particle images or correlation peaks are investigated using simulated and experimentally obtained images.

Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  1. 1.Fachgebiet Strömungslehre und AerodynamikTechnische Universität DarmstadtDarmstadtGermany
  2. 2.Energy and Process EngineeringTampere University of TechnologyTampereFinland

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