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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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Abstract
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.
| Document Type: | Conference or Workshop Item (Speech) | ||||
|---|---|---|---|---|---|
| Title: | Assessment of camera models for use in planar velocimetry calibration | ||||
| Authors: |
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| Date: | April 2006 | ||||
| Refereed publication: | No | ||||
| In SCOPUS: | No | ||||
| In ISI Web of Science: | No | ||||
| Status: | Published | ||||
| Keywords: | digital imaging, camera calibration, camera model, flow imaging, image transformation, Doppler global velocimetry, stereo particle image velocimetry | ||||
| Event Title: | PIVNET2 Workshop on latest application and development of particle sizing techniques in conjunction with PIV | ||||
| Event Location: | Capua, Italy | ||||
| Event Type: | international Conference | ||||
| Event Dates: | 2006-04-10 - 2006-04-11 | ||||
| Organizer: | Centro Italiano Ricerche Aerospatiali (CIRA) | ||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||
| HGF - Program: | Aeronautics | ||||
| HGF - Program Themes: | L ER - Engine Research | ||||
| DLR - Research area: | Aeronautics | ||||
| DLR - Program: | L ER - Engine Research | ||||
| DLR - Research theme (Project): | L - Virtual Engine and Validation Methods | ||||
| Location: | Köln-Porz | ||||
| Institutes and Institutions: | Institute of Propulsion Technology > Engine Measurement Systems | ||||
| Deposited By: | Dr.phil. Christian Willert | ||||
| Deposited On: | 03 May 2006 | ||||
| Last Modified: | 14 Jan 2010 23:15 |
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