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Inserting Characters and Graphics (1) — Title Key
Chroma Keying
3-36
Chapter 3 Basic Operation
In chroma keying, a key signal is created based on a specific reference
color in the foreground image, and used to replace the corresponding parts
of the foreground image by the background image. Normally, the
foreground image is created with a plain blue background, which is then
replaced by the background image.
Background image
Composite image formed by chroma
In this system, you can use either of the following methods to carry out
chroma keying.
• Auto chroma keying
You point the cursor at part of the background, thus specifying the keying
color. This is the quick and easy way to make a composite image.
• Manual chroma keying
You specify the keying color by manual adjustment. This allows you
finer control than with auto chroma keying.
By starting with auto chroma keying, then using manual chroma key
adjustments as required, you can get the optimum composite image
efficiently.
Two-channel chroma keying
With the optional BKDF-711 2nd Channel DME Board installed, you can
use a second chroma key channel.
To use two chroma key channels, set both title 1 and title 2 in the TITLE
section of the menu control section. To select the foreground image used
for the second chroma key channel, press the FRGD 2 button in the
delegation section, turning it on, then with one of the AUXILIARY
buttons select the desired video signal.
To use a normal effect for a title key
In this case, use one of the buttons in column 1 of the TITLE section to
recall the title 1 setting menu (T1LUM, T1CRK, or T1MSK), and make
the settings.
Foreground image
keying (program output)
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