Full Content is available to subscribers

Subscribe/Learn More  >

Changes in Camera Visibility Affect Measured Marker Motion

[+] Author Affiliations
Laurel Kuxhaus, Mark Carl Miller

Allegheny General Hospital, Pittsburgh, PAUniversity of Pittsburgh, Pittsburgh, PA

Patrick J. Schimoler, Jeffrey S. Vipperman

University of Pittsburgh, Pittsburgh, PA

Mark E. Baratz

Allegheny General Hospital, Pittsburgh, PA

Paper No. SBC2007-176503, pp. 23-24; 2 pages
  • ASME 2007 Summer Bioengineering Conference
  • ASME 2007 Summer Bioengineering Conference
  • Keystone, Colorado, USA, June 20–24, 2007
  • Conference Sponsors: Bioengineering Division
  • ISBN: 0-7918-4798-5
  • Copyright © 2007 by ASME


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.

Copyright © 2007 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In