User Manual

3 Connect in the texture: In the Node Editor, connect the output of the MediaIn node
containing the texture to the Corner Pin 1 input on the Planar Tracker node.
4 Adjust corner pin: Drag the corners of the corner pin in the viewer until the texture is
positioned correctly. Sometimes the Show Grid option is useful when positioning the
texture. Additionally, if it helps to position it more accurately, scrub to other times and
make adjustments to the corner pin.
5 Review: Play back the footage and make sure the texture “sticks” to the planar surface.
Merge Mode
Controls how the foreground (the corner pinned texture) is merged over the background (the
tracked footage). If there are multiple corner pins, this option is shared by all of them. There are
four options to pick from:
–
BG only
–
FG only
–
FG over BG
–
BG over FG
Number of Corner Pins
Use the + and - buttons to increase or decrease the number of corner pins. Each time an
additional corner pin is created, a corresponding input appears on the node in the Node Editor.
Corner Pin 1 Input Group
Each corner pin has a group of related inputs:
 Enable: Controls the visibility of the corner pin in the viewer.
 Show Grid: Shows a grid over the corner pin. This can be useful when positioning the
corners.
 Merge Options: Controls merging of corner pin texture over the background. (See the
documentation for the Merge node.)
 Reference Time Positions: The positions of the four corners at the reference time. If the
track was not perfect, these positions can be animated to make adjustments on top of
the track.
Stabilize Mode
Stabilize mode is used to smooth out shakiness in the camera by applying a transform that
partially counteracts the camera shake. This stabilizing transform (contained in the Stable Track
spline) is computed by comparing neighboring frames.
NOTE: Stabilize mode only smooths out motions, while Steady mode tries to
completely “lock off” all motion.
Be aware that the Planar Tracker stabilizes based on the motion of the pattern, so it is essential
to choose the pattern carefully. If the motion of the pattern does not represent the motion of the
camera, then there may be unexpected results. For example, if tracking the side of a moving
truck and the camera is moving alongside it, the Planar Tracker smooths the combined motion
of both the truck and the mounted camera. In some cases, this is not the desired effect. It may
be better to choose the pattern to be on some fixed object like the road or the side of a
building, which would result in smoothing only the motion of the camera.
Chapter – 107 Tracker Nodes 2412