Search found 104 matches

by Radhakrishnan Vignesh
Tue Sep 07, 2021 2:01 pm
Forum: OpenSim
Topic: OpenSim IK paper
Replies: 1
Views: 241

OpenSim IK paper

Hello,

Would it be possible to determine which paper or algorithm does the OpenSim IK derieve from? For example Visual3d IK is derieved from Van Den Bogert and Su (2008) method.

Also does the generalised coordinates refer to the model coordinate system?

Thanks, and Regards
Vignesh
by Radhakrishnan Vignesh
Thu Sep 02, 2021 7:08 am
Forum: OpenSim
Topic: Generating MarkerSet for publicly available .cd3 databases
Replies: 3
Views: 329

Re: Generating MarkerSet for publicly available .cd3 databases

Hello Ayman, Thanks for your response. Two additional questions sorry. Would I need to generate a new Scale marker file based on the experiemental markers on the database to allow virtual markers and experimental markers to match during the IK operation? Secondly when generating trc files usimg c3dE...
by Radhakrishnan Vignesh
Sun Aug 29, 2021 3:00 pm
Forum: OpenSim
Topic: Generating MarkerSet for publicly available .cd3 databases
Replies: 3
Views: 329

Generating MarkerSet for publicly available .cd3 databases

Hello, Sorry for the inconvenience but I am new to OpenSim and I am trying to use its scaling and inverse kinematic pipelines for my project. I would like to load marker based gait data from publicly available datasets and analyse the effects of subject specific scaling and IK. I do not have the mar...
by Radhakrishnan Vignesh
Thu Aug 26, 2021 1:51 pm
Forum: OpenSim
Topic: Soft tissue Artefact analysis on OpenSim
Replies: 0
Views: 60

Soft tissue Artefact analysis on OpenSim

I would like to know if the IK analysis done on OpenSim with the least squares approach is similar to the global optimisation proposed by Lu and Connor in 1999, which is used for soft tissue artefact analysis? Paper: Bone position estimation from skin marker co-ordinates using global optimisation wi...