Grass Valley Kayak HD v.6.9.3 - Manual (Page 379)

Kayak — User Manual 379
Chroma Key Operating Notes
earlier steps and readjust previous settings to optimize the key. Under-
standing what the chroma key controls do will help you decide what
adjustments are required for your individual situation.
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 1 Prim Suppress data pads, if necessary, to activate these
controls.
Data Pad 1 contains Luma / Chroma / Flare Suppression.
Data Pad 2 contains Hue and Selectivity.
Figure 302. Keyer Chroma Menu, Pri Suppress, Part1, Luma / Chroma / Flare S.
2. Adjust Hue, Selectivity, Chroma, and Luma primary suppression to
eliminate the backing color.