User Manual

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While in Interactive Object Tracking mode you may also choose to add tracking points
one by one.
To add a single tracking point:
1 Open the Tracker palette.
2 Turn on the Interactive Mode checkbox.
3 Using the DaVinci control panel, press the CURSOR button above the fourth trackball
of the Center panel, and move the onscreen cursor to the detail of the image that you
want to add a tracking point to.
4 Click the Set Point button, within the Interactive mode controls of the Tracker palette.
This adds a tracking point corresponding to the feature of the image that you clicked,
and you’re ready to start tracking.
Dealing With Occlusions When Tracking
Sometimes you’ll find that you need to deal with a gap in the useful tracking data. For example,
objects in the frame that pass in front of the feature you’re trying to track cause gaps in the
tracking information for a clip.
In situations where a subject being tracked becomes totally occluded by another object in the
frame, there’s an easy method of interpolating to cover holes in the available tracking data. In
the following example, the woman walks behind another fence post, this time one that’s taller
than she is. The window tracking her face will become completely lost at this point, but
interpolation will help to salvage this shot.
Original clip
Interpolating between two sets of tracking data to track past an occlusion:
1 Move the playhead to the first trackable frame of the moving feature you’re correcting,
and create a Power Window that surrounds it.
Adding the Power Window
Chapter – 121 Motion Tracking Windows 2749