Cornerpin, The smoothcam node, The smoothcam – Apple Shake 4 User Manual
Page 754: Node, Smoothcam node
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Chapter 25
Image Tracking, Stabilization, and SmoothCam
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track1BottomSearch: height/2-height/15
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track1TopSearch: height/2+height/15
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track1CenterX: width/2
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track1CenterY: height/2
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track1Visible: This parameter is the same as the visibility button that’s immediately
to the right of the trackName parameter.
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track1Enabled: If trackEnabled is not turned on, that tracker will not be used
during the next track analysis.
Add, Delete, Save, Load
These buttons allow you to create and remove additional tracking regions. You can also
save tracking data, and read it back in using the Save and Load buttons.
CornerPin
The CornerPin node can be used to push the four corners of an image into four
different positions, or to extract four positions and place them into the corners. For
more information on the CornerPin node, see “
The SmoothCam Node
This transformation node differs from the other tracking nodes described previously in
this chapter in that it doesn’t focus the track on small groups of pixels. Instead, it
evaluates the entire image at once, using advanced motion analysis techniques to
extract transformation data.
Once this information is derived, this node has two modes. It can smooth the shot,
eliminating unwanted jitter while maintaining the general motion of the camera, or it
can lock the shot, stabilizing the subject. This node can affect translation, rotation,
zoom, and perspective, making it more flexible for certain operations than the other
tracking nodes.
The SmoothCam node 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. Secondarily, the SmoothCam node can be
used to stabilize shots that may be difficult to lock using the Stabilize node.
As useful as the SmoothCam node is, be aware that motion blur that is present in the
image will remain, even though the subject in the shot is successfully smoothed or
locked. This may or may not affect your approach to the composite.
Important:
Interlaced images must be deinterlaced prior to use with the SmoothCam
node. For more information, see “