Image tracking, stabilization, and smoothcam, About image tracking nodes, Chapter – Apple Shake 4 User Manual
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Image Tracking, Stabilization, and
SmoothCam
Shake provides several methods of tracking, stabilizing,
and smoothing moving subjects in your scripts.
Additional tools are provided to process the keyframed
results of these operations, giving you even more
detailed control.
About Image Tracking Nodes
Shake provides four image tracking and stabilization nodes: Tracker, Stabilize,
MatchMove, and SmoothCam.
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Stabilize: The Stabilize node is used to correct unwanted movement in a shot. You
can also use the Stabilize node for matchmoving using the inverseTransform
parameter. Use of the Stabilize node’s inverseTransform parameter is recommended
rather than use of the MatchMove node, since it gives you the option to composite
later with an Over node. This technique also gives you proper pass-through of
onscreen controls for more intuitive control.
•
Tracker: The Tracker node does not transform the input image. It is used only to
generate tracks that can then be referenced by the MatchMove and Stabilize nodes,
or nodes such as Move2D and Pan with standard linking techniques.
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MatchMove: The MatchMove node allows two input images—a Foreground (the first
node input) and a Background (the second node input). By tracking one, two, or four
points on the background, the foreground can be set to match the movement of the
background. Placing a logo on the side of a moving truck is the classic example of a
matchmove. The single advantage the MatchMove node has over the Stabilize node is
that you can immediately test your track results.
Note: You can also attach a tracker to a rotoshape or paint stroke. For more
information, see “