User Guide

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ADOBE AFTER EFFECTS 5.0
User Guide
When you choose perspective corner pinning, the default positions of the track points form a rectangle in the
center of the motion footage layer (left). Moving each feature region extends the rectangle in the direction of
motion (center). You can place the track points anywhere in the motion footage layer (right).
Fine-tune the motion of the individual corner pins within the Layer window by dragging
the feature regions and noting the changes in the corresponding tracking coordinates. See
“Working with the Tracker/Stabilizer Controls” on page 394 for details on tracking
coordinates.
To define tracking regions for perspective corner pinning:
1 Size feature and search regions on separate areas that you want to track in the motion
footage layer. All four feature regions should lie in a single plane in the real world (for
example, on the side of a bus, on the same wall, or on the floor). The four track points
must also lie in a single plane, but not necessarily the same plane as the feature region.
2 Place the four track points at the locations where you want to attach the four corners of
the second layer. You can place the track points in the center, in the corner, or outside the
feature regions.
Attaching an effect to a tracked location
You can also use the Tracker/Stabilizer to apply an effect point to a tracked location. Just
as you would attach a second layer to a tracked region, attach an effect point to a tracked
region. The effect then follows the tracked region. For information on effect points, see
“Placing an effect using effect points” on page 274.
UG.book Page 403 Wednesday, February 21, 2001 12:05 PM