9 Frequently asked questions (FAQ)
Restart the room calibration. Move the wand gently within the measurement volume, in
order to generate a virtual point cloud. This point cloud should fill at least about two thirds
of the measurement volume.
Please refer to chapter 4.8.3 on page 51 for more information.
I cannot cover two thirds of the measurement volume within the set time for the
room calibration. How do I extend the time for the calibration process?
Please open the dialogue Calibration → Room and click Show details. There you can
extend the duration for the calibration process. Please refer to chapter 8.6.3 on page 166
for more information.
How shall I evaluate the room calibration results?
Please refer to chapter 8.6.3.2 on page 169 for a detailed explanation.
DTrack2 reports the error message "no angle tool detected". What went wrong?
First of all, please double-check if all markers are visible and that there are no disturbing
reflexes. Sometimes, it might help to move the calibration angle a little bit.
Please always verify the settings for the room calibration before repeating:
• wand length is printed on a label on the wand;
• select the correct calibration set.
The progress bar of the room calibration stopped.
Please double-check in the Monitor 2DOF display whether the calibration wand is recog-
nized by the cameras during its movement.
What is a "re-calibration" and when do I have to perform one?
DTrack2 provides simplified room and body calibrations, called room and body re-calibration.
The main advantage of a re-calibration is that DTrack2 preserves the origin and the ori-
entation of your coordinate system as well as specific information (predefined emission
vectors, cylindrical marker).
You may perform a room re-calibration from time to time or if a camera moved slightly
(e.g. due to mechanical instabilities).Please refer to chapter 8.6.3.3 on page 170.
If your body fell down or if the structure is bent you should carry out a body re-calibration.
Please refer to chapter 8.6.5.7 on page 182 for more information.
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