Document Detail


Oblique scaling: an algorithm to correct for a non-perpendicular camera view in tendon strain measurements.
MedLine Citation:
PMID:  10940415     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Image distortion due to a non-perpendicular camera view introduces serious errors in tendon and ligament strain measurements when data are recorded using a single camera. These errors can be corrected with the oblique scaling algorithm using two pairs of scaling markers attached to the tendon surface. Computer simulations show that application of this algorithm reduces errors over 100 times to less than 0.06%. The method is relatively insensitive to measurement errors in the scaling marker distance but sensitive to the accuracy of alignment of the scaling markers. It can be concluded that the oblique scaling algorithm eliminates the influences of a non-perpendicular camera view in single-camera tendon and ligament strain measurements.
Authors:
L S Meershoek; H C Schamhardt1
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Publication Detail:
Type:  In Vitro; Journal Article; Validation Studies    
Journal Detail:
Title:  Journal of biomechanics     Volume:  33     ISSN:  0021-9290     ISO Abbreviation:  J Biomech     Publication Date:  2000 Nov 
Date Detail:
Created Date:  2000-12-11     Completed Date:  2000-12-11     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0157375     Medline TA:  J Biomech     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1529-32     Citation Subset:  IM    
Affiliation:
Equine Biomechanics Research Group, Department of Veterinary Anatomy and Physiology, Faculty of Veterinary Medicine, Utrecht University, P.O. Box 80.157, 3508 TD, Utrecht, The Netherlands. l.s.meershoek@vet.uu.nl
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MeSH Terms
Descriptor/Qualifier:
Algorithms*
Animals
Biomechanics
Computer Simulation
Humans
Ligaments / physiology
Models, Biological
Sensitivity and Specificity
Tendons / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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