Tektronix Grass Valley 3000 - Manual (Page 171)

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Chroma Keying Operations
Chroma Keying Operations
Chroma keying allows you to key out a particular color in a scene
and replace it with new background video. A typical application
is to position a reporter in front of a blue wall and set up a chroma
key to replace the blue wall with a weather map.
Given a well-lit and well-composed chroma key scene, the high-
quality chroma keyer used in the switcher can produce a clean
and natural-looking key with smooth edges and realistic
shadows, even when the chroma key scene contains smoke, glass,
or liquids.
Creating a chroma key is especially easy with the Chroma Key
Auto Setup feature. This feature automatically sets up the key
when you identify the background color. In addition, the Chroma
Key Menu and submenus give you the ability to make many
manual adjustments for fine tuning the key.
Figure 4-11. Chroma Key – Background