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Chroma Keying Operations
NOTE:
SEC COLOR SUPRESSION is subtle and only applies to areas
of the key which are translucent.
a. Set SEC COLOR SUPPRESS to on, and set the SUPPRESS
MODE
to CHROMA. If you did not use Auto Setup, adjust
the SEC COLOR SUPPRESS ANGLE to match the chroma
keyer's hue. The angle indicated in () next to the menu
knob indicates the offset. Note that Auto Setup does this
for you.
b. Set SEC COLOR SUPPRESS SELECTIVITY to mid range
and SEC CHROMA SUPPRESS LEVEL to maximum. (This
makes the affected region more visible and is probably
not the final setting.)
c. Adjust SEC COLOR SUPPRESS ANGLE to maximize the
effect on the targeted area. Ignore all other areas of the
image when making this adjustment
d. Reduce
SEC CHROMA SUPPRESS LEVEL to obtain a
natural look to the target area of the image. Again ignore
other areas of the image, especially the transition from the
target area
e. Adjust SEC COLOR SUPPRESS SELECTIVITY for a
balance between too much change to other picture areas
vs. not enough change in the target area
Notice that the most change is made in the areas immediately
surrounding the target. Use SEC LUM SUPPRESS LEVEL in a
similar manner to mask brightness variations in the same
target area.
9. Key edge cleanup: If FGD RESHAPE is on, some amount of key
edge cleanup is possible with KEY WIDTH, KEY POSITION and
KEY SOFTNESS located in the CHR KEY/KEY ADJUST menu.
The basic idea is to narrow and soften the key edge so that it
occurs where there is foreground video instead of areas which
have been partially contaminated by the chroma key wall.