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Error quantification of particle position estimation on colour images for Particle Tracking Velocimetry

Roloff, Christoph and Zähringer, Katharina and Thévenin, Dominique (2012) Error quantification of particle position estimation on colour images for Particle Tracking Velocimetry. 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 09. - 12. Jul. 2012, Lisbon, Portugal.

Full text not available from this repository.

Official URL: http://ltces.dem.ist.utl.pt/lxlaser/lxlaser2012/program.asp

Abstract

Particle Tracking Velocimetry relies on an accurate determination of particle image centroids in order to carry out reliable 3D photogrammetric reconstruction and trajectory linking. Centroid estimation on monochrome images is usually carried out with subpixel accuracy. When utilising differently coloured tracer particles to facilitate assignment procedures for PTV, colour cameras are required. They feature Bayer mosaic colour filters, which reduce the apparent pixel resolution of each colour channel. The present work is a first approach allowing to quantify centroid errors for different combinations of centroid estimators and demosaicing procedures using simulated colour particle images and varying parameter sets. The centroid of mass estimator turns out to be the most reliable method for most demosaicing techniques, with mean errors in subpixel range. A customised colour defiltering approach seems to be superior in certain defined ranges of wavelengths, but requires a colour classification of particles a priori.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Error quantification of particle position estimation on colour images for Particle Tracking Velocimetry
Authors:
AuthorsInstitution or Email of Authors
Roloff, ChristophInstitute of Fluid Dynamics and Thermodynamics, Otto-von-Guericke University, Magdeburg, Germany
Zähringer, KatharinaInstitute of Fluid Dynamics and Thermodynamics, Otto-von-Guericke University, Magdeburg, Germany
Thévenin, DominiqueInstitute of Fluid Dynamics and Thermodynamics, Otto-von-Guericke University, Magdeburg, Germany
Date:2012
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-12
Series Name:Conference Proceedings online
Status:Published
Keywords:Particle Tracking Velocimetry (PTV), Tomo-PIV, Colour Class Correction (CCC), characteristic wavelength (CW)
Event Title:16th International Symposium on Applications of Laser Techniques to Fluid Mechanics
Event Location:Lisbon, Portugal
Event Type:international Conference
Event Dates:09. - 12. Jul. 2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:23 Oct 2012 15:05
Last Modified:23 Oct 2012 15:05

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