Počet záznamů: 1

High-Quality Vector Field and Direct Vorticity Estimation Uusing the Affine Correlation Method

  1. 1.
    0352080 - UT-L 2011 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
    Gronát, Petr
    High-Quality Vector Field and Direct Vorticity Estimation Uusing the Affine Correlation Method.
    Engineering Mechanics 2010. Prague: Institute of Thermomechanics AS CR, v. v. i., 2010 - (Zolotarev, I.), s. 35-36. ISBN 978-80-87012-26-0.
    [ENGINEERING MECHANICS 2010. Svratka (CZ), 10.05.2010-13.05.2010]
    Grant CEP: GA ČR GA101/08/1112; GA ČR GAP101/10/1230
    Výzkumný záměr: CEZ:AV0Z20760514
    Klíčová slova: PIV * normalized cross correlation * affine correlation * vortex detection
    Kód oboru RIV: BK - Mechanika tekutin

    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.
    Trvalý link: http://hdl.handle.net/11104/0191671