Sony DFS-700 Manuel d'utilisateur télécharger pdf (Page 62)

Chapter 3 Basic Operation

3-36 Chapter 3 Basic Operation

Inserting Characters and Graphics (1) — Title Key

Chroma Keying

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.

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.

Background image Foreground image

Composite image formed by chroma

keying (program output)

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Sony DFS-700 Manuel d'utilisateur Page 62