Multiple range imaging camera operation with minimal performance impact

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dc.contributor.authorWhyte, Refael Z.
dc.contributor.authorPayne, Andrew D.
dc.contributor.authorDorrington, Adrian A.
dc.contributor.authorCree, Michael J.
dc.coverage.spatialConference held at San Jose, California, USAen_NZ
dc.date.accessioned2010-04-27T01:44:23Z
dc.date.available2010-04-27T01:44:23Z
dc.date.issued2010
dc.description.abstractTime-of-flight range imaging cameras operate by illuminating a scene with amplitude modulated light and measuring the phase shift of the modulation envelope between the emitted and reflected light. Object distance can then be calculated from this phase measurement. This approach does not work in multiple camera environments as the measured phase is corrupted by the illumination from other cameras. To minimize inaccuracies in multiple camera environments, replacing the traditional cyclic modulation with pseudo-noise amplitude modulation has been previously demonstrated. However, this technique effectively reduced the modulation frequency, therefore decreasing the distance measurement precision (which has a proportional relationship with the modulation frequency). A new modulation scheme using maximum length pseudo-random sequences binary phase encoded onto the existing cyclic amplitude modulation, is presented. The effective modulation frequency therefore remains unchanged, providing range measurements with high precision. The effectiveness of the new modulation scheme was verified using a custom time-of-flight camera based on the PMD19-K2 range imaging sensor. The new pseudo-noise modulation has no significant performance decrease in a single camera environment. In a two camera environment, the precision is only reduced by the increased photon shot noise from the second illumination source.en
dc.format.mimetypeapplication/pdf
dc.identifier.citationRefael Z. Whyte, Andrew D. Payne, Adrian A. Dorrington, and Michael J. Cree, "Multiple range imaging camera operation with minimal performance impact," Image Processing: Machine Vision Applications III, David Fofi, Kurt S. Niel, Editors, Proc. SPIE, 7538, 75380I (2010).en
dc.identifier.doi10.1117/12.838271en
dc.identifier.urihttps://hdl.handle.net/10289/3826
dc.language.isoen
dc.publisherSPIEen_NZ
dc.relation.isPartOfImage Processing: Machine Vision Applications IIIen_NZ
dc.rightsCopyright 2010 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, 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
dc.sourceConference on Image Processing - Machine Vision Applications IIIen_NZ
dc.subjecttime of flighten
dc.subjectrange imagingen
dc.subjectPseudo-Noise (PN) codingen
dc.titleMultiple range imaging camera operation with minimal performance impacten
dc.typeConference Contributionen
pubs.begin-page1en_NZ
pubs.elements-id19494
pubs.end-page10en_NZ
pubs.finish-date2010-01-20en_NZ
pubs.place-of-publicationUSAen_NZ
pubs.start-date2010-01-20en_NZ
pubs.volumeProceedings of SPIEen_NZ
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