Matrox Electronic Systems Matrox RT.X2 - Manual (Page 100)

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Chapter 4, Setting Up Realtime Effects with Adobe Premiere Pro
Creating a chroma key or chroma key shadow
effect
To set up a Matrox chroma key or chroma key shadow effect, click the triangle
next to
Matrox Chroma Key/Matrox Chroma Key Shadow to expand the
property list:
• Graphical Provides a graphical representation of the chroma key controls
that you can use to select your key colors, and also lets you perform an auto
key.
$ Map Lets you select your key colors within a circular graph that contains
a color spectrum.
$
Plot Displays a plot of the colors present in your clip so that you can
select the particular colors on which you want to key.
$
Show Key Click this button to display the matte used to create your key
effect. This enables you to further refine your key. For example, when you
display the matte, your key color (such as green) appears as black, and
opaque areas appear as white. If you notice some white spots that you want
to key, you can adjust the key controls until the undesired white spots
disappear.