Original title: Affine Correlation Method for Direct Vorticity, Skew and Displacement Estimation
Authors: Gronát, Petr
Document type: Papers
Conference/Event: Topical Problems of Fluid Mechanics 2010, Praha (CZ), 2010-02-10 / 2010-02-11
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 considering the affine transformation of a correlation window is presented. It is shown, that Lagrangian field of displacements, con- sidering the linear terms only, satis- fyes the requirements for affine transfor- mation. Using the Normalized–Cross– Correlation together with affine trans- formation and Newton-Raphson itera- tive method, six parameters defining the transformation can be estimated. Subse- quently, both displacement and vorticity can be computed using the above men- tioned parameters, hence, the vorticty is being obtained for every single point di- rectly during the correlation procedure.
Keywords: affine correlation; normalized cross correlation
Project no.: CEZ:AV0Z20760514 (CEP), GA101/08/1112 (CEP)
Funding provider: GA ČR
Host item entry: Topical Problems of Fluid Mechanics 2010, ISBN 978-80-87012-25-3

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/11104/0191240

Permalink: http://www.nusl.cz/ntk/nusl-42133


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