Motion analysis is an important tool for biomechanical studies and its accuracy and reliability for large-volume applications, such as gait labs, is well-established. Previous work has offered a comparison of commercially available systems.[1] No work to date has quantified the error in position of a given tracking marker caused by its removal from the view of one or more cameras, either by obstruction or by the data being removed during the image reconstruction process. This issue is critical to the tracking of extremely fine movements such as the travel of the radial head on the capitellum during elbow motion. Due to anatomical constraints, markers must frequently be placed a distance away from the body of interest and must be smaller than those conventionally used in gross motion analysis. The nature of the motion may not permit all cameras to view all markers all of the time. For example, a specimen may itself obstruct a camera’s view during certain motions.
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ASME 2007 Summer Bioengineering Conference
June 20–24, 2007
Keystone, Colorado, USA
Conference Sponsors:
- Bioengineering Division
ISBN:
0-7918-4798-5
PROCEEDINGS PAPER
Changes in Camera Visibility Affect Measured Marker Motion Available to Purchase
Laurel Kuxhaus,
Laurel Kuxhaus
Allegheny General Hospital, Pittsburgh, PA
University of Pittsburgh, Pittsburgh, PA
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Patrick J. Schimoler,
Patrick J. Schimoler
University of Pittsburgh, Pittsburgh, PA
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Jeffrey S. Vipperman,
Jeffrey S. Vipperman
University of Pittsburgh, Pittsburgh, PA
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Mark E. Baratz,
Mark E. Baratz
Allegheny General Hospital, Pittsburgh, PA
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Mark Carl Miller
Mark Carl Miller
Allegheny General Hospital, Pittsburgh, PA
University of Pittsburgh, Pittsburgh, PA
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Laurel Kuxhaus
Allegheny General Hospital, Pittsburgh, PA
University of Pittsburgh, Pittsburgh, PA
Patrick J. Schimoler
University of Pittsburgh, Pittsburgh, PA
Jeffrey S. Vipperman
University of Pittsburgh, Pittsburgh, PA
Mark E. Baratz
Allegheny General Hospital, Pittsburgh, PA
Mark Carl Miller
Allegheny General Hospital, Pittsburgh, PA
University of Pittsburgh, Pittsburgh, PA
Paper No:
SBC2007-176503, pp. 23-24; 2 pages
Published Online:
March 12, 2014
Citation
Kuxhaus, L, Schimoler, PJ, Vipperman, JS, Baratz, ME, & Miller, MC. "Changes in Camera Visibility Affect Measured Marker Motion." Proceedings of the ASME 2007 Summer Bioengineering Conference. ASME 2007 Summer Bioengineering Conference. Keystone, Colorado, USA. June 20–24, 2007. pp. 23-24. ASME. https://doi.org/10.1115/SBC2007-176503
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