Refining tracking results

If you are satisfied with the results of the automatic tracking process, you can export your project at this point. Otherwise, you may want to edit the 2D tracks.

You can do so by:

Adding tracks. SeeCreating a new track.
Deleting unnecessary or unwanted tracks. See Deleting tracks.
Cleaning up the 2D tracks. See Cleaning up tracks.
Defining point relations. SeeMotion control.

If you are an expert user, adding track points serves to work around a weakness of the automatic tracker or to add a point necessary for defining a coordinate system which the automatic tracker would not have considered. See Defining coordinate systems.

Cleaning up tracks

You can run the Cleanup Assistant to let MatchMover automatically remove points, based on the parameters you set. This option's main purpose is to reduce the number of tracks, while keeping relevant tracking information, so that manual edition becomes easier.

Note

As a recommendation, however, do the automatic clean-up only if you are unhappy with the result after running the solver once. It is best to first run the solver with all the tracks.

Do one of the following:
- Select 3D Tracking > Clean Assistant.
- Click the Clean up tracks icon in the Toolbar.
- Press F11.
The Cleanup window opens.
Specify the settings.
- Keep ... tracks per frame targets an average number of tracks in each frame after the clean up. The default value is 30 frames.
- Keep tracks that last at least ... frames deletes all tracks lasting less than the desired number of frames. The default value is 10 frames.
- Residual cleanup deletes all tracks with a residual value above a threshold you set.
This can only be done after the solver has finished running.
If you do not want to delete manually added tracks, select the option to Always keep hard tracks.

For example, if a track satisfies at least one condition, it will be kept. For instance if you set the length > 10 and residual < 0.8, then a track lasting six frames with residual 0.4 will be kept because of the second filter.

TipThe Automatic Cleanup option of the previous version of MatchMover is roughly equivalent to keeping 40 tracks per frame.