NewTek TriCaster TCXD300, Руководство пользователя

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The Spill controls, when enabled, remove key color spill in your scene by reducing the amount of
that color in the foreground, where it doesn’t belong. The net result is that it is eliminated, or at
least reduced to the point where it is not objectionable.
Use the Tolerance and Smoothness controls under Spill Suppression in similar fashion to the
controls by the same name discussed earlier. Endeavor to subdue spill without overdoing it,
which could result in an unsightly gray fringe around offending edges of your foreground.
14.4 GARBAGE MATTE
The term Garbage Matte may sound like something found beneath a trashcan in the kitchen, but
in this context it has a very different meaning. It is very common for a greenscreen shot to have
unintentional inclusions that really need to be removed along with the background but which
remain after the base chromakey process is applied.
Figure 165
Common examples include microphones or lighting fixtures dangling from above, or perhaps a
harsh crease, blemish or tear in the background screen. Or, as is frequently the case, the source
video itself may have a few pixels of black or video ‘noise’ along one or more of its edges.
The Garbage Matte label owes its name to techniques used to remove such unwanted ‘garbage’
from the scene.
Essentially, the four numeric controls in the Garbage Matte group allow you to define
independent margins for the frame. Drag left or right on the number fields to adjust the values
interactively, or double-click (or right-click) a field to type a value using the keyboard. The region
defined by these four controls will be completely cropped.