There's not code in our repositories that does that explicitly at the moment.

There is not, unfortunately. It has to do with file sizes for upload and sharing computational resources. You could set up 2 capture volumes, alternate recording, and stitch the trials together later.

The height of the checkerboard doesn't matter.

3 cameras adds robustness to occlusion, since every body part needs to be visible to at least 2 cameras at each timeframe; however, we've found that adding a 3rd camera doesn't necessarily add accuracy for activities where there is not much occlusion.

Since the entire trunk is modeled as a rigid body, the rotation of the shoulder relative to the pelvis is entirely defined by the lumbar joint. You can check out the euler sequence of the lumbar joint in the .osim file to see where lumbar_rotation falls in the sequence. Since it is an euler angle, i...

Please check out the information and videos here https://www.opencap.ai/best-practices

1) 2 cameras is fine for gait at ~30deg. If you want a 3rd, I'd put it just off of center.
2) the checkerboard needs to be perpendicular to the ground (see link above)
3) ~3m from camera is good

All cameras need to be able to see the checkerboard, so you cannot have one behind the subject in this case. The optimal setup very much depends on the activities you care about and your desired capture volume. Every body part needs to be visible to at least 2 cameras at all times, so if you have oc...

Thanks for pointing this out. It should be fixed now if you want to try creating an account again.

The KAM is computed using joint reaction analysis after the simulation. See code antoine posted above. If you are using a different model (eg with a knee adduction dof), you will need to change some things in the simulation.

Anaconda or Visual Studio with C++?

If at least 2 cameras cannot see all keypoints on the person, it will assume they have left the frame and trim the trial. If this problem is showing up with prosthesis users, my guess is that the pose detection algorithm is not recognizing some of the joints on the prosthesis. The more like a biolog...