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Initialize 3D troubleshooting
The following topics offer solutions to commonly encountered initialization issues.
❙ Initialize 3D fails to initialize all the face marker points.
❙ Initialize 3D initializes all the face marker points, but some points are mismatched.
Initialize 3D fails to initialize all the face marker points.
When fixing this problem, you can either add to the existing results (if they are correct but incomplete), or you can first undo (Ctrl+Z) the results of the previous Initialize 3D process, before making some or all of the following changes and re-running the Initialize 3D process. Either way should give acceptable results.
You can use two possible approaches to solving this problem, either separately or in combination.
❙ The first approach is to change the Initialize 3D parameters and run the Initialize 3D process again, with the aim of solving the problem automatically. To do this, in the Properties pane, try changing the following Initialize 3D parameters:
– Increase the Max. Allowed Depth parameter value, especially if the facial marker points are widely spaced.
– Increase the Max. Allowed Symmetric Epipolar Distance parameter.
❙ The second approach is to add in some or all of the missing marker points by hand-matching detections in regions where the automatic 3D initialization has failed. To do this:
a. Select matching detections in multiple 2D views and then click Edit > Merge (or press M).
b. If needed, you can then re-run the Initialize 3D process.
c. If you have performed purely manual corrections to the initialization, perform a final bundle adjustment to get the best results, by clicking Process > Bundle Frame [Unconstrained].
Initialize 3D initializes all the face marker points, but some points are mismatched.
You can use two possible approaches to solving this problem, either separately or in combination:
❙ The first approach is to undo the previous 3D initialization, change the Initialize 3D parameters and run the Initialize 3D process again, with the aim of solving the problem automatically. To do this:
a. Press Ctrl+Z to undo the results of the previous Initialize 3D process.
b. In the Properties pane, try changing the following Initialize 3D parameters:
– Decrease the Max. Allowed Depth parameter value, especially if the facial marker points are close together.
– Decrease the Max. Allowed Symmetric Epipolar Distance parameter.
c. Click Process > Initialize 3D.
❙ The second approach is to correct mismatched points by hand. To do this:
a. Delete any incorrect matches by selecting the incorrectly matched 3D point(s), and clicking Edit >Clear Selected [Current Frame].
b. Re-match the 3D point(s) by selecting matching detections in multiple 2D views and clicking Edit > Merge.
c. If you have performed purely manual corrections to the initialization, perform a final bundle adjustment to get the best results, by clicking Process > Bundle Frame [Unconstrained].
Initialize 3D initializes all face marker points, but some are repeated, and are not merged between camera caddies.
You can use two possible approaches to solving this problem, either separately or in combination:
❙ The first approach is to undo the previous 3D initialization, change the Initialize 3D parameters and run the Initialize 3D process again, with the aim of solving the problem automatically. To do this:
a. Press Ctrl+Z to undo the results of the previous Initialize 3D process.
b. In the Initialize 3D Parameters section of the Properties pane, increase the value for the Max. 3D Distance to Merge parameter.
c. Click Process > Initialize 3D.
❙ The second approach is to merge the repeated 3D points by hand. To do this:
a. For each case, select the two instances of the repeated point and click Edit > Merge.
b. To get the best results, perform a final bundle adjustment, by clicking Process > Bundle Frame [Unconstrained].