Controlling Fine-Tuning

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‌Controlling Fine-Tuning

When you fine-tune, SynthEyes will modify each auto-tracker so that there is only one key every 8 frames (by default), then run the supervised tracker at all the intermediate frames.

There are several options you can control when starting fine-tuning:

- The spacing between keys

- The size of the trackers

- The aspect ratio of the trackers (usually square, 1.0)

- The horizontal and vertical search sizes

- The shot’s current supervised-tracker filter interpolation mode.

- Whether all auto trackers will be tuned, or those that are currently selected (whether they are automatic, or a previously-unlocked automatic tracker, which would not otherwise be processed).

Combining Automated and Supervised Tracking

- Whether you want the trackers to remain auto-trackers, or be changed to be considered “gold” supervised trackers.

You should carefully set these parameters based on your experience at supervised tracking and some test tracks. Very static and slowly changing shots can use a larger spacing between keys; more dynamic shots, say with twists or lighting changes, should use closer-together keys.

Since the supervised tracking will be starting from the known location of the automatic tracker, the search size can be relatively small.

Note that if you leave the trackers as auto-trackers, then later convert them to gold, the search size will be reset to a default value at that time. That is not a significant reason; keeping them as automatic trackers is recommended.

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