Kayenne XL Package — User Manual
43
Keying
Keying
Keying inserts part of one picture into another to create a composite pic-
ture.
Keying involves three signals:
•
Background,
•
Key cut, used to specify where to cut a hole in the background, and
•
Key fill, used to fill the hole in the background.
The fill can be an incoming video signal or it can be an internally generated
matte fill. A separate key cut input signal is not necessarily required for
keying. For example, a self key (also called a video key) uses the same input
signal for both key cut and key fill.
The Kayak HD system supports the following types of keys:
•
Additive Key
•
Luminance Key
•
Linear Key
•
Chroma Key
•
Preset Pattern
The system also supports self keys and split keys.
Matte Fill Key Example
One of the earliest keying techniques was to use an art card and camera to
perform a luminance key with a matte fill. This type of key is a good
example for explaining basic keying principles because three separate and
independent incoming signals are used.
To insert a green logo into background video, the logo can be printed in
white on black paper and a camera can be focused on it. The signal from the
camera can be selected as the key cut signal and green matte video can be
selected as the key fill signal sent to the keyer. The key cut signal is then
adjusted (clipped) to ignore the black paper and use only the white logo
shape to cut a hole in the background video. The keyer then shapes the key
fill to precisely match the logo-shaped hole cut in the background and fills
it with green matte video. This creates a green logo inserted into the back-
ground (
Figure 7
). Because luminance values of the key cut signal are used
to cut the hole in the background this is called a luminance key.
Summary of Contents for Kayenne XL Package
Page 82: ...82 Kayenne XL Package User Manual Section 2 Concepts ...
Page 264: ...264 Kayenne XL Package User Manual Section 4 Menu Overview ...
Page 275: ...Kayenne XL Package User Manual 275 Status Menu M E Mapping Submenu In Preparation ...
Page 285: ...Kayenne XL Package User Manual 285 Install Menu Figure 217 Install E Box Tally In Assign ...
Page 347: ...Kayenne XL Package User Manual 347 Config Menu Figure 282 Config Copy Simple Menu ...
Page 352: ...352 Kayenne XL Package User Manual Section 5 Menu Summaries Figure 285 Example ...
Page 434: ...434 Kayenne XL Package User Manual Section 5 Menu Summaries Figure 345 Chroma Key Main ...
Page 435: ...Kayenne XL Package User Manual 435 Key Menu Figure 346 Chroma Key Main Cursor ...
Page 437: ...Kayenne XL Package User Manual 437 Key Menu Figure 348 Chroma Key Suppression Cursor ...
Page 462: ...462 Kayenne XL Package User Manual Section 5 Menu Summaries ...
Page 487: ...Kayenne XL Package User Manual 487 RamRecorder Menu Figure 405 Export Dialog 2 ...
Page 509: ...Kayenne XL Package User Manual 509 Scaler Menu ...
Page 583: ...Kayenne XL Package User Manual 583 EMEM Menu Figure 472 EMEM Edit Insert Trigger Macro Number ...
Page 590: ...590 Kayenne XL Package User Manual Section 5 Menu Summaries ...
Page 618: ...618 Kayenne XL Package User Manual Glossary ...