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User Boresighting for AR Calibration: A Preliminary Analysis
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
Human Systems Integration Division, NASA Ames Research Center.
2008 (English)In: Proceedings of the IEEE Virtual Reality Conference 2008, IEEE , 2008, 43-46 p.Conference paper, Published paper (Refereed)
Abstract [en]

The precision with which users can maintain boresight alignment between visual targets at different depths is recorded for 24 subjects using two different boresight targets. Subjects' normal head stability is established using their Romberg coefficients. Weibull distributions are used to describe the probabilities of the magnitude of head positional errors and the three dimensional cloud of errors is displayed by orthogonal two dimensional density plots. These data will lead to an understanding of the limits of user introduced calibration error in augmented reality systems.

Place, publisher, year, edition, pages
IEEE , 2008. 43-46 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-72053DOI: 10.1109/VR.2008.4480748ISBN: 978-1-4244-1971-5 (print)OAI: oai:DiVA.org:liu-72053DiVA: diva2:456337
Conference
IEEE Virtual Reality Conference, 2008. VR '08, 8-12 March, Reno, Nevada, USA
Available from: 2011-11-14 Created: 2011-11-14 Last updated: 2011-11-21Bibliographically approved
In thesis
1. Pinhole Camera Calibration in the Presence of Human Noise
Open this publication in new window or tab >>Pinhole Camera Calibration in the Presence of Human Noise
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The research work presented in this thesis is concerned with the analysis of the human body as a calibration platform for estimation of a pinhole camera model used in Augmented Reality environments mediated through Optical See-Through Head-Mounted Display. Since the quality of the calibration ultimately depends on a subject’s ability to construct visual alignments, the research effort is initially centered around user studies investigating human-induced noise, such as postural sway and head aiming precision. Knowledge about subject behavior is then applied to a sensitivity analysis in which simulations are used to determine the impact of user noise on camera parameter estimation.

Quantitative evaluation of the calibration procedure is challenging since the current state of the technology does not permit access to the user’s view and measurements in the image plane as seen by the user. In an attempt to circumvent this problem, researchers have previously placed a camera in the eye socket of a mannequin, and performed both calibration and evaluation using the auxiliary signal from the camera. However, such a method does not reflect the impact of human noise during the calibration stage, and the calibration is not transferable to a human as the eyepoint of the mannequin and the intended user may not coincide. The experiments performed in this thesis use human subjects for all stages of calibration and evaluation. Moreover, some of the measurable camera parameters are verified with an external reference, addressing not only calibration precision, but also accuracy.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2011. 113 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1402
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-72055 (URN)978-91-7393-053-6 (ISBN)
Public defence
2011-11-04, Domteatern, Visualiseringscenter C, Kungsgatan 54, Norrköping, 09:30 (English)
Opponent
Supervisors
Available from: 2011-11-14 Created: 2011-11-14 Last updated: 2015-09-22Bibliographically approved

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Axholt, MagnusPeterson, Stephen

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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  • Other style
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Language
  • de-DE
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  • en-US
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
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