Počet záznamů: 1

Affine Correlation Method for Direct Vorticity, Skew and Displacement Estimation

  1. 1.
    0351501 - UT-L 2011 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
    Gronát, Petr
    Affine Correlation Method for Direct Vorticity, Skew and Displacement Estimation.
    Topical Problems of Fluid Mechanics 2010. Praha: Ústav termomechaniky, AV ČR, v. v. i., 2010 - (Příhoda, J.; Kozel, K.), s. 59-62. ISBN 978-80-87012-25-3.
    [Topical Problems of Fluid Mechanics 2010. Praha (CZ), 10.02.2010-11.02.2010]
    Grant CEP: GA ČR GA101/08/1112
    Výzkumný záměr: CEZ:AV0Z20760514
    Klíčová slova: normalized cross correlation * affine correlation
    Kód oboru RIV: BK - Mechanika tekutin

    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.
    Trvalý link: http://hdl.handle.net/11104/0191240