Working with two-point tracking – Apple Shake 4 User Manual
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Chapter 25
Image Tracking, Stabilization, and SmoothCam
At this point, you have a track and a smoothed version of that track. The following
example shows the Y curves of the two tracks.
6
Create a Stabilize node.
7
In the Stabilize node, expand track1, then enter the following expression in the track1X
and track1Y parameters:
•
In track1X, enter: Tracker1.track1X - Tracker1.track2X
•
In track1Y, enter: Tracker1.track1Y - Tracker1.track2Y
Thus, you get only the difference between the two curves—the jitter.
Note: This illustration is scaled differently in Y than the above illustrations.
8
In the Stabilize node parameters, set applyTransform to active.
The plate is only panned by the amount of the jitter, and maintains the overall
camera move.
Working With Two-Point Tracking
There are several additional options available when working with two-point tracking.
You can choose to pan, scale, and/or rotate the image. When setting the applyScale
and applyRotate parameters, you have three choices: “none,” “live,” and “baked.”