3
Table Of Contents
- Motion 3 Supplemental Documentation
- Contents
- 3D Compositing
- Motion Tracking
- About Motion Tracking
- How a Tracker Works
- Motion Tracking Behaviors
- Shape Track Points Behavior
- Track Parameter Behavior
- Motion Tracking Workflows
- Adjusting the Onscreen Trackers
- Strategies for Better Tracking
- Finding a Good Reference Pattern
- Manually Coaxing Your Track
- Manually Modifying Tracks
- Converting Tracks to Keyframes
- When Good Tracks Go Bad
- Smoothing Tracking Keyframe Curves
- Preserving Image Quality
- Asking Motion for a Hint
- Giving Motion a Hint
- Tracking Images with Perspective, Scale, or Rotational Shifts
- Tracking Obscured or Off-Frame Points
- Tracking Retimed Footage
- Troubleshooting Stabilizing Effects
- Removing Black Borders Introduced by Stabilizing
- Some General Guidelines
- Tracking and Groups
- Saving Tracks
- Motion Tracking Behavior Parameters
64 Chapter 2 Motion Tracking
2 In the Behaviors tab of the Inspector, choose Four Corners from the Type pop-up menu.
Note: The Four Corners option is not available when Match Move is applied to a 3D
group. To corner-pin a 3D group, turn on the Flatten checkbox in the Group tab of the
Inspector.
In the Canvas, a tracker appears at each corner of the foreground object. In the
Inspector, the default track list (Anchor and Rotation-Scale), is replaced with the Top
Left, Top Right, Bottom Right, and Bottom Left trackers.
3 In the Canvas, drag each tracker to a “corner” of the background element (in this
example, the corners of the picture frame provide the four-corner track points).
As with the Analyze Motion trackers, a magnified inset appears in the Canvas as you
drag the trackers.
4 Click the Analyze button in the HUD or Behaviors tab of the Inspector.