Blackmagic Design Ultimatte 12 Manual De Instrucciones página 14

Matte
This is the primary matte you will be working with in your composite. This matte is derived using
the source connected to the foreground input. Typically a presenter in front of a green screen.
The matte is generated internally by analyzing the backing color in the source video and will
determine what is visible in the foreground image.
TIP Objects that obscure the backing color, either partly or completely, will be visible
in the composited image. In the matte, fully opaque black means the corresponding
areas in the fill image will be completely visible. Shades of grey means partially
transparent.
Garbage Matte
A garbage matte excludes areas of a source you don't want to include in your composite.
For example, there may be lights and gripping equipment visible around the edges of your
foreground image. If you want to mask out these unwanted areas, a garbage matte lets you do
that. Garbage mattes can be generated externally so they precisely match shapes in your
source video, and connected to the garbage matte input.
TIP An internal mask can be created using the 'window' controls. This can be a great
tool for creating a fast, rough garbage matte. For more information on how to setup
window masks, refer to the 'matte input settings/window' section.
Holdout Matte
This matte is similar to a garbage matte, however, it lets you mask out areas from within the
visible foreground so they are ignored by the matte.
For example, imagine a portion of a virtual set needs to appear green in the foreground.
This will present a challenge because anything green will key out and reveal the background
underneath. A holdout matte can be created to exclude that particular area within the set, which
will prevent it from being keyed.
Layer Matte
The layer matte lets you add more foreground elements to the scene. For example, if you want
to add graphics over the top of the composite.
You can swap the layer positioning in the final composite. For example, you may want to change
the layer order during your production so the layer input appears in front of, then behind, the
talent. You can even set a transition rate so the order change is a smooth mix transition.
For more information, refer to the 'Matte input settings/setting the layer order' section.
What is a Matte? 14