Choosing marker pairs for scaling

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Sheeba Davis
Posts: 56
Joined: Sat Mar 23, 2019 5:19 am

Choosing marker pairs for scaling

Post by Sheeba Davis » Mon Sep 14, 2020 2:48 am

Hello OpenSim Community

My default 'Scale measurementSet' file has several marker pairs. But my experimental data has only few markers. Do I choose the marker pairs based on only the experimental markers available?

For ex: In the default 'Scale measurementSet' file, the marker pair used to scale the Pelvis height is R.ASIS and R.HJC. But my experimental data does not have R.HJC, so do i skip that marker pair totally? Or Can i use R.ASIS and R.GREATERTROCHANTER instead for calculating Pelvis height? or Am I supposed to choose the marker pairs based on what experimental markers are available?

Any help would be appreciable. Thanks in advance.

Regards
Sheeba
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Windows
OpenSim 4.1
MATLAB
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Thomas Uchida
Posts: 1793
Joined: Wed May 16, 2012 11:40 am

Re: Choosing marker pairs for scaling

Post by Thomas Uchida » Mon Sep 14, 2020 9:45 am

The following webinar may be helpful if you haven't seen it already: "OpenSim Webinar: Tips and Tricks for Data Collection, Scaling and Inverse Kinematics in OpenSim", https://www.youtube.com/watch?v=ZG7wzvQC6eU.
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