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4 Create additional open or closed paths to clean up other areas of the image, and then
select them from the Cleanup Foreground or Cleanup Background menu. Cleanup
Foreground paths increase the opacity along the path; Cleanup Background paths
decrease the opacity along the path. Use the Brush Radius and Brush Pressure options to
control the size and density of each stroke.
Note: You can select the Background (outer) mask as a Cleanup Background path to clean
up noise from the background portions of the image.
5 Set Edge Thin to specify how much of the matte's border is affected by the key. A
positive value moves the edge away from the transparent region, increasing the trans-
parent area; Negative values move the edge toward the transparent region and increase
the size of the foreground area.
6 Increase the Edge Feather values to soften edges of the keyed area. High Edge Feather
values take longer to render.
7 Specify the Edge Threshold, which is a soft cutoff for removing low opacity pixels that
can cause unwanted noise in the image background.
8 Select Invert Extraction to reverse the foreground and background regions.
9 Set Blend with Original to specify the amount you want the resulting extracted image
to blend with the original image.
Linear Color Key (PB only)
This key uses RGB, hue, or chroma information to create transparency from a specified key
color. In the Effect Controls window, it displays two thumbnails; the left thumbnail repre-
sents the unaltered source image, and the right thumbnail represents the view you've
selected in the View menu.
You can adjust the key color, the matching tolerance, and the matching softness. The
matching tolerance specifies how closely pixels must match the key color before they start
becoming transparent. The matching softness controls the softness of edges between the
image and the key color.
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Applying Effects
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