When you have scenes in which normal fiducial measurement is not possible, you can generate artificial fiducial measurements for them.
To estimate damaged or missing fiducial marks
That is, run Auto Fiducial Collection as described in the topic.
You can verify the accuracy of the fiducial-mark estimations in the Fiducial Mark Collection window, under Errors, or you can view the Fiducial.rpt file in the folder in which the project is saved.
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