THE VERIFICATION OF HYBRID IMAGE DEFORMATION ALGORITHM FOR PIV

Authors

  • Jan Novotný
  • Ludmila Nováková Department of Fluid Dynamics and Thermodynamic, Faculty of Mechanical Engineering, Czech Technical University in Prague Technická 4, Prague 6, 16000, Czech republic

Abstract

The aim of this paper was to test a newly designed algorithm for more accurate calculation of the image displacement of seeding particles when taking measurement using the Particle Image Velocimetry method. The proposed algorithm is based on modification of a classical iterative approach using a three-point subpixel interpolation and method using relative deformation of individual areas for accurate detection of signal peak position. The first part briefly describes the tested algorithm together with the results of the performed synthetic tests. The other part describes the measurement setup and the overall layout of the experiment. Subsequently, a comparison of results of the classical iterative scheme and our designed algorithm is carried out. The conclusion discusses the benefits of the tested algorithm, its advantages and disadvantages.

Cílem této práce bylo otestovat nově navržený algoritmus pro přesnější výpočet posunutí obrazů značkovacích částic při měření metodou Particle Image Velocimetry. Navržený algoritmus je založen na modifikaci klasického iteračního přístupu s využitím tříbodové sub pixelové interpolace a metodě využívající vzájemné deformace jednotlivých oblastí pro přesné stanovení polohy signálového peaku. V první části je stručně popsán testovaný algoritmus spolu s výsledky již provedených syntetických testů. V další části práce je popsána měřicí trať a celkové uspořádání experimentu. Následně je provedeno srovnání výsledků klasického iteračního schématu a námi navrženého algoritmu. V závěru jsou pak diskutovány přínosy testovaného algoritmu jeho výhody a nevýhody.

Author Biography

Jan Novotný

Department of Fluid Dynamics and Thermodynamic, Faculty of Mechanical Engineering, Czech Technical University in Prague Technická 4, Prague 6, 16000, Czech republic

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Published

2016-03-14

Issue

Vol. 14 No. 01 (2016)

Section

Articles

License

Copyright (c) 2016 Jan Novotný, Ludmila Nováková

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