Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/142843
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dc.contributor.authorShi, Shengxianen_US
dc.contributor.authorDing, Junfeien_US
dc.contributor.authorNew, Tze Howen_US
dc.contributor.authorLiu, Youen_US
dc.contributor.authorZhang, Hanmoen_US
dc.date.accessioned2020-07-03T07:55:35Z-
dc.date.available2020-07-03T07:55:35Z-
dc.date.issued2019-
dc.identifier.citationShi, S., Ding, J., New, T. H., Liu, Y., & Zhang, H. (2019). Volumetric calibration enhancements for single-camera light-field PIV. Experiments in Fluids, 60(1), 21-. doi:10.1007/s00348-018-2670-5en_US
dc.identifier.issn0723-4864en_US
dc.identifier.urihttps://hdl.handle.net/10356/142843-
dc.description.abstractThis work presents a volumetric calibration method for single-camera light-field particle image velocimetry (light-field PIV or LF-PIV). The proposed technique makes use of the unique point-like feature of particle light-field images to accurately determine affected pixels for a spatial voxel over a relative large measurement volume. A calibration model is derived based on Gaussian optics, which relates a spatial point light source with its confusion circle produced on microlens array (MLA), and optical distortions are accounted for by introducing five calibration parameters. By taking lens defects and misalignment between MLA and image sensor into account, the calibration method can calculate weighting coefficient for particle image reconstruction more accurately than the theoretical ray-tracing method, especially for regions further away from focal plane where light ray deflections are significant due to optical distortions. The volumetric calibration method was validated by simulation tests using synthetic light-field images, and has been successfully applied to a classic vortex-ring LF-PIV measurement, where the measurable range in depth direction was successfully extended and the quality of reconstructed volumetric velocity field was greatly improved.en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.language.isoenen_US
dc.relation.ispartofExperiments in Fluidsen_US
dc.rights© 2019 Springer-Verlag GmbH Germany, part of Springer Nature. This is a post-peer-review, pre-copyedit version of an article published in Experiments in Fluids. The final authenticated version is available online at: http://dx.doi.org/10.1007/s00348-018-2670-5.en_US
dc.subjectEngineering::Mechanical engineeringen_US
dc.titleVolumetric calibration enhancements for single-camera light-field PIVen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.identifier.doi10.1007/s00348-018-2670-5-
dc.description.versionAccepted versionen_US
dc.identifier.scopus2-s2.0-85059524413-
dc.identifier.issue1en_US
dc.identifier.volume60en_US
dc.subject.keywordsLF-PIVen_US
dc.subject.keywordsMLAen_US
item.grantfulltextopen-
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Appears in Collections:MAE Journal Articles
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