Troubleshooting tracking

• Symptoms

• There is too much segmentation in the capture file.

• Resolutions

  • Check the tracking parameters, see chapter 3D Tracker parameters.

  • Make a new calibration.

  • Check that the camera positioning is OK, see chapter Camera positioning.

  • Check that the calibration wand has been moved in the area where the segmentation occurs. E.g. when segmentation occurs close to the floor at gait measurements.

 

• Symptoms

• The trajectories are swapping.

• Resolutions

  • Check if the markers on the measurement object can be smaller.

  • Check if the markers on the measurement object are too close to each other. Move them further apart to reduce swapping.

  • Lower the Max frame gap setting on the 3D Tracking page in the Project options dialog. A large Max frame gap will make it more likely that some trajectories will swap.

  • Check the tracking parameters, see chapter 3D Tracker parameters.

 

• Symptoms

• There are large gaps between two 3D points in trajectories.

• Resolutions

  • Check that the capture frequency is high enough.

 

• Symptoms

• AIM cannot find a solution or finds the wrong solution.

• Resolutions

  • Make sure that it is the correct AIM model that is applied.

  • Make sure that the model was generated from a file where all of the trajectories could be viewed during the whole measurement and where there were no erratic data, see chapter Generating an AIM model.

 

• Symptoms

• The markers in the 3D view window are located in one plane.

• Resolutions

  • 2D tracking has been used instead of 3D tracking. If you want 3D tracking in the following captures change to 3D on the Processing page in the Project options dialog. To 3D track a saved capture file with 2D tracked data, you have to Batch process the file with 3D tracking, see chapter Batch processing.