Original title: High-Quality Vector Field and Direct Jacobian Estimation
Authors: Gronát, Petr
Document type: Papers
Conference/Event: Symposium on Anemometry /24./, Holany – Litice (CZ), 2010-06-01 / 2010-06-02
Year: 2010
Language: eng
Abstract: In this paper, a correlation method for direct vorticity computation of the fluid velocity field is introduced. The correlation method allows an affine transformation of a correlation window. It is shown that Lagrangian field of displacements, considering the linear terms only, satisfies the requirements for affine transformation and using the Normalized-Cross-Correlation (NCC) together with affine transformation and Newton-Raphson iterative method, six parameters defining this transformation can be estimated. Using these parameters, both displacement and vorticity can be computed directly without differentiation of the vector field.
Keywords: affine transformation; normalized cross correlation; PIV
Project no.: CEZ:AV0Z20760514 (CEP), GA101/08/1112 (CEP), GAP101/10/1230 (CEP)
Funding provider: GA ČR, GA ČR
Host item entry: 24th Symposium on Anemometry, ISBN 978-80-87117-07-1

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0006186

Permalink: http://www.nusl.cz/ntk/nusl-42181


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Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers