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72 Chapter 2 Motion Tracking
To record four-point tracking using Analyze Motion:
1 Go to the frame where you want to start the track and apply an Analyze Motion
behavior to the background element.
By default, a single tracker appears in the Canvas.
For four-point Analyze Motion and Stabilize operations, the trackers should be
positioned in a clockwise order, starting in the upper-left corner. This ensures the
proper alignment of your element when the transformation is applied.
2 Drag the tracker (Track 1) to the desired reference pattern in the top-left corner of the
background element.
3 In the Behavior tab of the Inspector, click Add to add a second tracker, then drag the
second tracker (Track 2) to the desired reference pattern in the top-right corner of the
background element.
4 Add another tracker (Track 3) and drag it to the desired reference pattern in the
bottom-right corner of the background element.
5 Add another tracker (Track 4) and drag it to the reference pattern in the bottom-left
corner of the background element.
6 Click the Analyze button in the HUD or Behaviors tab of the Inspector.
The track is generated and its data saved in the behavior.
Note: You can save tracking behaviors to the Library for later use.
To apply the recorded four-point tracking to a foreground element:
1 Apply a Match Move behavior to the foreground element you want to corner-pin.
2 If the Analyze Motion data is not automatically applied, choose the existing four-point
Analyze Motion track from the tracking behaviors pop-up menu.
3 Choose Four Corners from the Type pop-up menu in the HUD or Behaviors tab of the
Inspector.
4 Click the Analyze button in the HUD or Behaviors tab of the Inspector.
The four-point tracking data from the Analyze Motion behavior is applied to the
foreground element.
Track 1
Track 2
Track 4
Track 3