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Section 3 — Switcher Concepts
Both background and foreground suppression include menu
controls for selecting the hue to be replaced and for adjusting the
luminance and chrominance levels in the areas of the picture
where suppression is applied.
NOTE:
Refer to The descriptions and illustrations in Chroma Keying
Operations in Section 4 of this manual.
Coring
Coring is a video noise-reducing operation in which pixels below
a predetermined luminance threshold are replaced by “clean”
black pixels. During keying, the black eliminates any noise
surrounding the fill video that might otherwise add to the
background, causing noisy key edges.
A menu selection enables or disables the coring function and
allows adjustment of the coring level to ensure that video is fully
removed in the key area.