Barco FSN Series User Manual page 146

5. Menu Orientation
Keyer Menu
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The {Type} button is a pop-up that enables you to select the processing mode for the
selected keyer.
Luma
Linear
Type
Luma
Figure 5-41. Key type pop-up
Press {Type} to display the Key Type Pop-up , which offers two options:
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{Luma} — Enables the Luminance Key mode, in which the hole-cutting
information is derived from the luminance (brightness) level of the key source.
{Linear} — Enables the Linear Key mode, which allows the edges of anti-aliased
key sources (such as character generators) to be reproduced clearly. Two
separate signals are required from a linear key source: a cut and a fill. Refer to
the " Map Buttons Menu " section on page 210 for mapping details.
Note When Linear Key mode is selected, the {Key Fill} button is
grayed out. This occurs because the linear key cut and fill
signals are pre-determined on the Map Buttons Menu .
FSN Series • User's Guide