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Assessment of camera models for use in planar velocimetry calibration

Willert, Christian (2006) Assessment of camera models for use in planar velocimetry calibration. PIVNET2 Workshop on latest application and development of particle sizing techniques in conjunction with PIV, 2006-04-10 - 2006-04-11, Capua, Italy.

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Kurzfassung

The performance of pinhole-based camera models for use in common light-sheet imaging arrangements is investigated on the background of application to particle image velocimetry (PIV) and Doppler global velocimetry (DGV). Calibration data obtained from translated planar calibration targets was found to yield camera attitude within 0.1° on four different test cases with object distance varying as little as 2% depending on the choice of camera model. Camera calibration using data from a single image of coplanar points is considered a viable alternative to manual triangulation of camera positions but is restricted to off-normal viewing directions. Also the influence of image mismatch and errors in viewpoint location on the reconstruction of 3-C PIV velocity data is demonstrated. It was found that the magnitude of residuals of the once-overdetermined system of equations are a viable measure of quality that is very sensitive to image geometry misalignment.

Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Assessment of camera models for use in planar velocimetry calibration
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Willert, ChristianNICHT SPEZIFIZIERT
Datum:April 2006
Referierte Publikation:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:digital imaging, camera calibration, camera model, flow imaging, image transformation, Doppler global velocimetry, stereo particle image velocimetry
Veranstaltungstitel:PIVNET2 Workshop on latest application and development of particle sizing techniques in conjunction with PIV
Veranstaltungsort:Capua, Italy
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2006-04-10 - 2006-04-11
Veranstalter :Centro Italiano Ricerche Aerospatiali (CIRA)
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Antriebe
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L ER - Antriebsforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Virtuelles Triebwerk und Validierungsmethoden
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Antriebstechnik > Triebwerksmesstechnik
Hinterlegt von: Dr.phil. Christian Willert
Hinterlegt am:03 Mai 2006
Letzte Änderung:12 Dez 2013 20:19

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