User Manual

 Domain: Setting this option to Domain will respect the upstream domain of definition
when applying the node’s effect. This can have adverse clipping effects in situations
where the node employs a large filter.
 None: Setting this option to None will not perform any source image clipping at all.
This means that any data required to process the node’s effect that would normally be
outside the upstream DoD will be treated as black/transparent.
Contract/Expand
This slider shrinks or grows the semitransparent areas of the matte. Values above 0.0 expand
the matte, while values below 0.0 contract it.
This control is usually used in conjunction with the Matte Blur to take the hard edge of a matte
and reduce fringing. Since this control affects only semitransparent areas, it will have no effect
on a matte’s hard edge.
Gamma
Matte Gamma raises or lowers the values of the matte in the semitransparent areas. Higher
values cause the gray areas to become more opaque, and lower values cause the gray areas to
become more transparent. Completely black or white regions of the matte remain unaffected.
Since this control affects only semitransparent areas, it will have no effect on a matte’s
hard edge.
Threshold
This range slider sets the lower threshold using the handle on the left and sets the upper
threshold using the handle on the right.
Any value below the lower threshold setting becomes black or transparent in the matte.
Any value above the upper threshold setting becomes white or opaque in the matte. All values
within the range maintain their relative transparency values.
This control is often used to reject salt and pepper noise in the matte.
Restore Fringe
This restores the edge of the matte around the keyed subject. Often when keying, the edge of
the subject where you have hair is clipped out. Restore Fringe brings back that edge while
keeping the matte solid.
Invert Matte
When this checkbox is selected, the Alpha channel created by the keyer is inverted, causing all
transparent areas to be opaque and all opaque areas to be transparent.
Solid Matte
Solid Mattes are mask nodes or images connected to the solid matte input on the node. The
solid matte is applied directly to the Alpha channel of the image. Generally, solid mattes are
used to hold out keying in areas you want to remain opaque, such as someone with blue eyes
against a blue screen.
Enabling Invert will invert the solid matte, before it is combined with the source Alpha.
Chapter – 98 Matte Nodes 2145