For Chroma Key:
Chroma Keying is used to key from a particular color. It produces a soft-edged key which is most
suitable for moving images and “weatherman” style applications.
Color grabber:
Select Chroma Key menu -> Select Color grabber menu
Using a crosshair, you can select a particular hue based on what is on screen. Once you have ad-
justed the crosshairs to a desired position, press set/enter to capture the color value at that instant.
You can then adjust the other parameters such as Tolerance to further refine your key.
Manual Setting:
Select Chroma Key menu -> Manual Settings menu
R,G,B
:
These controls allow you to manually select a hue, defined by its Red, Green, and Blue va-
lues as you can find in Windows (Paint software).
Tolerance:
The Tolerance parameter allows you to expand your key color selection to include colors
which are similar to the selected value. A tolerance of 1 will select only the desired hue,
whereas a tolerance of 255 will select nearly all hues.
Black Level:
This option permits adjustment of the luminance levels of the keyed hue. The Black Level is
the luminance lower bound. Colors in the selected hue range with a luminance brighter than
the Black Level but darker than the White Level will be considered part of the key.
White Level:
This option permits adjustment of the luminance levels of the keyed hue. The White Level is
the luminance lower bound. Colors in the selected hue range with a luminance brighter than
the Black Level but darker than the White Level will be considered part of the key.
Titling alpha:
If you have selected one of the two Titling modes, the titling menu appears.
This option places a transparent black backdrop behind the entire layer to which the key is applied.
This effect is useful for using bright titles on bright backgrounds, such as clouds.
Invert keying:
By default, this mode is disabled. When this mode is activated, the key selection will remain on
screen, and all other portions of the image will be keyed away. For example, you would see the
green screen behind the actor, while the actor would be keyed away.
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