Must own markernames match with Osim-standard

[Matthias Kunze]

Hallo,

I have a question to the markerset (xml-files).
Should the markernames of self-created .trc-files match with the markernames which OpenSim uses? Or is it possible to use the scale-tool with own markernames?

thanks,

Matthias

[Yi Wang]

You can either change the markers name attached on the subject or you can modify the name your markerset, anyway, they really should match each other.

just my experience.

Yi.

[Matthias Kunze]

thanks for your answer,
but the problem is, if I change the markernames in the xml-file, and so create my own marker-system, the model is twisting and constitute in wrong directions. So the markernames, -postitions and -bodies influence the model.
Is there no standard (like IEEE) for the markerplacements or similar? Like the "Plug-in-Gait-placement"?

thanks,

Matthias

[Ayman Habib]

Hi Matthias,

You also need to keep in mind the coordinate frames assumed by the OpenSim model, for example our models have Y up (and usually "walk" in +X direction), if your data does not conform to that convention and you want to use our models/tools you'd need to transform the data to the correct frame (using the File->Preview Motion Data functionality).

Please let me know if that doesn't answer your question.

Cheers,
-Ayman

[Matthias Kunze]

This problem I had already solved. But the way to match the data with OpenSim is very difficult, because I' ve to change all the markernames (xml-file) and hope that coordinates of OpenSim match with my markers.
So my question is, if there's some standard/ convention or universal markerset? ... Maybe when I create new markernames in a new experiment, so I should use this ones.

thanks,

Matthias