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dc.contributor.authorPayne, Andrew D.
dc.contributor.authorDorrington, Adrian A.
dc.contributor.authorCree, Michael J.
dc.coverage.spatialConference held at Orlando, Floridaen_NZ
dc.date.accessioned2011-06-27T22:04:37Z
dc.date.available2011-06-27T22:04:37Z
dc.date.issued2011
dc.identifier.citationA.D. Payne, A.A. Dorrington and Michael J. Cree, “Illumination waveform optimization for time-of-flight range imaging cameras,” Videometrics, Range Imaging, and Applications XI, Fabio Remondino, Mark R. Shortis Editors, Proc. SPIE 8085, 80850D (2011).en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/5425
dc.description.abstractTime-of-flight range imaging sensors acquire an image of a scene, where in addition to standard intensity information, the range (or distance) is also measured concurrently by each pixel. Range is measured using a correlation technique, where an amplitude modulated light source illuminates the scene and the reflected light is sampled by a gain modulated image sensor. Typically the illumination source and image sensor are amplitude modulated with square waves, leading to a range measurement linearity error caused by aliased harmonic components within the correlation waveform. A simple method to improve measurement linearity by reducing the duty cycle of the illumination waveform to suppress problematic aliased harmonic components is demonstrated. If the total optical power is kept constant, the measured correlation waveform amplitude also increases at these reduced illumination duty cycles. Measurement performance is evaluated over a range of illumination duty cycles, both for a standard range imaging camera configuration, and also using a more complicated phase encoding method that is designed to cancel aliased harmonics during the sampling process. The standard configuration benefits from improved measurement linearity for illumination duty cycles around 30%, while the measured amplitude, hence range precision, is increased for both methods as the duty cycle is reduced below 50% (while maintaining constant optical power).en_NZ
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherSociety of Photo-Optical Instrumentation Engineers
dc.rightsCopyright 2011 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.en_NZ
dc.sourceConference on Videometrics, Range Imaging, and Applications XIen_NZ
dc.subjecttime of flighten_NZ
dc.subjectrange imagingen_NZ
dc.subjectrange cameraen_NZ
dc.subjectaliasingen_NZ
dc.subjectharmonic cancellationen_NZ
dc.subjectlinearityen_NZ
dc.subjectprecisionen_NZ
dc.titleIllumination waveform optimization for time-of-flight range imaging camerasen_NZ
dc.typeConference Contributionen_NZ
dc.identifier.doi10.1117/12.889399en_NZ
dc.relation.isPartOfProceedings of SPIE 8029Ben_NZ
pubs.begin-page1en_NZ
pubs.elements-id20639
pubs.end-page13en_NZ
pubs.finish-date2011-04-29en_NZ
pubs.start-date2011-04-25en_NZ
pubs.volume8085en_NZ


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