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Optical See-Through Head Mounted Display: Direct Linear Transformation Calibration Robustness in the Presence of User Alignment Noise
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology. Linköping University, Department of Science and Technology, Visual Information Technology and Applications (VITA).
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology. Linköping University, Department of Science and Technology, Visual Information Technology and Applications (VITA).
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology. Linköping University, Department of Science and Technology, Visual Information Technology and Applications (VITA).
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2010 (English)Report (Other academic)
Abstract [en]

The correct spatial registration between virtual and real objects in optical see-through augmented reality implies accurate estimates of the user’s eyepoint relative to the location and orientation of the display surface. A common approach is to estimate the display parameters through a calibration procedure involving a subjective alignment exercise. Human postural sway and targeting precision contribute to imprecise alignments, which in turn adversely affect the display parameter estimation resulting in registration errors between virtual and real objects. The technique commonly used has its origin incomputer vision, and calibrates stationary cameras using hundreds of correspondence points collected instantaneously in one video frame where precision is limited only by pixel quantization and image blur. Subsequently the input noise level is several order of magnitudes greater when a human operator manually collects correspondence points one by one. This paper investigates the effect of human alignment noise on view parameter estimation in an optical see-through head mounted display to determine how well astandard camera calibration method performs at greater noise levels than documented in computer vision literature. Through Monte-Carlo simulations we show that it is particularly difficult to estimate the user’s eyepoint in depth, but that a greater distribution of correspondence points in depth help mitigate the effects of human alignment noise.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2010. , 7 p.
Series
LiTH-ISY-R, ISSN 1400-3902 ; 3003
Keyword [en]
Head-mounted display, Calibration, Direct linear transform, Robustness
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:liu:diva-97748ISRN: LiTH-ISY-R-3003OAI: oai:DiVA.org:liu-97748DiVA: diva2:650690
Available from: 2013-09-23 Created: 2013-09-23 Last updated: 2015-09-22

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Axholt, MagnusSkoglund, MartinPeterson, StephenCooper, MatthewSchön, ThomasGustafsson, FredrikYnnerman, Anders

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CiteExportLink to record
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