User Manual

Once you have the selection, the Erode control expands the pre-matte, removing any small
pixels of non-green/blue screen around the edges. Then, growing the pre-matte fills in the
holes until you have a solid blue or green image.
Inputs
The Clean Plate node includes three inputs in the Node Editor.
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Input: The orange input accepts a 2D image that contains the green or blue screen.
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Garbage Matte: The white 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 excluded
from the clean plate. For a clean plate, garbage mattes should contain areas that are
not part of the blue or green screen.
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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 clean plate is generated. An effects mask is applied
to the tool after the tool is processed.
Basic Node Setup
The Clean Plate node and the Delta Keyer are two separate branches stemming from the main
image you want to key. The green-screen or blue-screen clip is breached to connect to both
the orange image input on the Clean Plate and the orange image input on the Delta Keyer. The
output of the clean plate is then connected to the magenta clean plate input on the Delta Keyer.
The output of the Delta Keyer is then used as the foreground to a Merge.
A Clean Plate connected to a Delta Keyer
Chapter – 98 Matte Nodes 2147