User Manual

Table Of Contents
It contains several keying systems: the Key tab is the master difference keyer and Pre-Matte is a
built-in clean plate to smooth out screen color. Tuning, Fringe, and Matte finish the keying
process. The tabs are laid out in the rough order you tend to use them.
Inputs
The Delta Keyer node includes five inputs in the Node Editor.
Input: The orange input accepts a 2D image that contains the color you want to be
keyed for transparency.
Garbage Matte: The gray garbage matte input accepts a mask shape created by
polylines, basic primitive shapes, paint strokes, or bitmaps masks. Connecting a
mask to this input causes areas of the image that fall within the matte to be made
transparent. The garbage matte is applied directly to the Alpha channel of the image.
Solid Matte: The white solid matte input accepts a mask shape created by polylines,
basic primitive shapes, paint strokes, or bitmaps masks. Connecting a mask to this
input causes areas of the image that fall within the matte to be fully opaque.
Clean Plate: Accepts the resulting image from the Clean Plate node.
Effect Mask: The optional blue input expects a mask shape created by polylines,
basic primitive shapes, paint strokes, or bitmaps masks. Connecting a mask to this
input limits the pixels where the keying occurs. An effects mask is applied to the tool
after the tool is processed.
Basic Node Setup
A single Delta keyer rarely gets perfect results because most green- or blue-screen shots have
problems that the keyer is not made to handle. Keyers often need the help of garbage mattes
or solid mattes created with a Polygon or B-Spline node. Shots can also require more than just
one keyer to achieve perfect results. That is shown in one of the examples below, where one
Delta Keyer is used to create a hard inner white matte, while a second Delta Keyer is used to
capture the soft edges. The core matte below is then connected into the solid matte input on
the second Delta Keyer. Color correction, including spill suppression, is best handled as a
separate branch in your node tree. Separating your matte from your color correction using
underlays makes it clear what branch of nodes is performing what operation.
Starting point for a Delta Keyer setup
Chapter – 98 Matte Nodes 2150