User Manual

When creating a mask, the fixed areas of the image to be analyzed for tracking should be
encompassed in the white portion of the mask. All moving objects that need to be ignored
should be encompassed in the black portion. The mask should then be attached to the Camera
Tracker Track Mask input.
Masks used to omit the moving clouds and waves from being tracked by the Camera Tracker.
By doing this, the tracker ignores the waves of the water and moving clouds. Unlike drawing a
mask for an effect, the mask in this case does not have to be perfect. You are just trying to
identify the rough area to occlude from the tracking analysis.
The original image to be tracked (left), and the occlusion mask of the clouds and water (right).
TIP: If there’s a lot of motion in a shot, you can use the Tracker or Planar Tracker nodes
to make your occlusion mask follow the area you want to track. Just remember that,
after using the PlanarTracker or PlanarTransform node to transform your mask, you
need to use a Bitmap node to turn it back into a mask that can be connected to the
Camera Tracker node’s Track Mask input.
1595Chapter – 77 3D Camera Tracking