GRASS VALLEY zodiak, User Manual

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Zodiak User Manual 379
Chroma Key Operating Notes
Access Keyer Menu and Delegate Keyer
Press the Keyer Menu panel button, then touch the
Mode
category selection
button to access the Keyer Chroma menu. You can also double press the
Chr
button in the Keyers subpanel to access this menu. Delegate the keyer you
wish to set up on the left side of the screen, then touch the
Chroma Key
Mode
button ( Figure 258 ).
Primary Suppression
Primary suppression is the most critical chroma key parameter, and the
easiest to set. Auto Setup should take care of this, but manual adjustments
can be made if desired. If primary suppression is set wrong, however, it will
be impossible to achieve a good chroma key with the other controls.
Primary Suppression should be set while looking at the foreground. Ideally
the backing color will appear as a small dot on the vector scope and a per-
fectly flat line on the waveform display, but this never occurs due to set
lighting variations, shadows, etc. This means you will need to pick the best
suppression for the overall look of the key.
1. Touch the stage 1 Pri Suppress data pad, if necessary, to activate these
controls (
Figure 258 ).
Figure 258. Keyer Chroma Menu, Pri Suppress Controls