Název:
High-Quality Vector Field and Direct Vorticity Estimation Uusing the Affine Correlation Method
Autoři:
Gronát, Petr Typ dokumentu: Příspěvky z konference Konference/Akce: ENGINEERING MECHANICS 2010, Svratka (CZ), 2010-05-10 / 2010-05-13
Rok:
2010
Jazyk:
eng
Abstrakt: We present a correlation method for direct vorticity computation of the fluid velocity field. The correlation method allows the affine transformation of a correlation window. It is shown that Lagrangian field of displacements is locally affine considering linear terms only. Using the Normalized-Cross-Correlation (NCC) combined with affine transformation and Newton-Raphson iterative method, six parameters defining this transformation are estimated. Subsequently, using these parameters, both displacement and vorticity can be computed, hence, these properties are being obtained for every single pixel directly during the correlation procedure.
Klíčová slova:
affine correlation; normalized cross correlation; PIV; vortex detection Číslo projektu: CEZ:AV0Z20760514 (CEP), GA101/08/1112 (CEP), GAP101/10/1230 (CEP) Poskytovatel projektu: GA ČR, GA ČR Zdrojový dokument: Engineering Mechanics 2010, ISBN 978-80-87012-26-0
Instituce: Ústav termomechaniky AV ČR
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Informace o dostupnosti dokumentu:
Dokument je dostupný v příslušném ústavu Akademie věd ČR. Původní záznam: http://hdl.handle.net/11104/0191671