5

Note: When using the Match Move behavior for four-point tracking, the trackers are
placed in the correct order (clockwise from the top left) in the Canvas after Four Corner
is chosen from the Type pop-up menu in the Behaviors Inspector. If you’ve used more
than four trackers or you need to change the order of the trackers, choose a different
order from the Top Left, Top Right, Bottom Right, or Bottom Left pop-up menus.
Stabilize Workflow
This section provides an overview of the Stabilize tracking behavior, used to smooth shaky
motion in a movie or image sequence. For a full description of Stabilize parameters, see
Stabilize Controls.
With the Stabilize behavior, there are three ways to analyze a clip:
• Use the default advanced motion analysis technique that evaluates the entire frame
of a clip at once to extract movement data without onscreen trackers.
• Use onscreen trackers that analyze a reference pattern (a small group of pixels) in the
Canvas. These are the same trackers used by the Match Move and Analyze Motion
behaviors.
• Use a combination of the advanced motion analysis and onscreen trackers.
Important: For information on using onscreen trackers with the Stabilize behavior, see
Adding Trackers to the Stabilization.
After the motion analysis is complete, you can apply it in either of two ways. The clip can
be smoothed, eliminating unwanted jitter while maintaining the general motion of the
camera, or the clip can be locked, stabilizing the subject. The smoothing can affect
translation, rotation, or scale, making it more flexible for some operations than the other
tracking behaviors.
The Stabilize behavior is primarily useful for removing unwanted trembling from
less-than-stable crane or jib arm moves, eliminating teetering from handheld walking
shots, or reducing vibrations in automotive shots.
1312 Chapter 22 Motion Tracking