2017

Table Of Contents
The motion is tracked. The reference is the anchor point on which the tracker was placed, but the
motion is applied to the offset target.
6 Exit the Stabilizer.
The tracking data is applied to the offset targets. The corners of the replacement image are still at their
original position, where there were no adequate anchor points, but the motion and the positioning is
correct.
Adjusting the Surface With the User Shape Channel
When tracking surfaces in Action, you have access to a user shape channel, that you can use to fine tune or
to add additional deformation to the existing tracking animation, without affecting the tracking animation.
Once the surface has been tracked, you can adjust the vertices, the UV points or the tangents of the surface,
to add deformation or to adjust the position of the surface. This creates a keyframe at the timecode you
specified, which is stored in the user shape channel and does not interfere with the tracking animation.
In this example, after tracking our bilinear surface, we change the surface type to Extended Bicubic. We then
adjust the tangents of the extended bicubic surface, at frame 63, curving the surface for it to fill the TV
screen.
734 | Chapter 17 Stabilizing and Tracking