Compositing A Subject And Background (Chroma Key) - Roland VR-120HD Reference Manual

Video Composition Operations

Compositing a Subject and Background (Chroma Key)

Here's how you can cut out a video by turning its blue or green portion
transparent, and then superimpose it on the background video. This lets
you composite a subject that's photographed against a blue background
or green background.
Compositing using DSK
This shows how to composite an image using "DSK 1".
The steps are the same when using "DSK 2".
1 .
Press the DSK 1 [SETUP] button to turn on (lit).
The DSK setup screen appears.
2 .
Touch the setup screen to make the following settings.
Parameter Explanation
DSK Mode Self Key
DSK Type Chroma Key
Chroma Settings (page 2)
Specify either "GREEN" or "BLUE" as the key color. You
Color
can also specify a color you desire as the key color (p.
39).
3 .
Press a VIDEO SWITCHER [1]–[8] button to select the DSK
video source.
Magenta: DSK video source
White: Video input available
Unlit: Video input unavailable
* When selecting a video that is not assigned to Input 1–8, set this in
"DSK Source" on the setup screen.
4 .
Press the DSK 1 [PVW] button to turn on the preview output
(lit).
A preview of the composition results is displayed in the PVW section
of the multi-view.
At this stage, the final output has not yet been changed.
38
Background video DSK video source
Blue or green
5 .
Touch the setup screen to adjust the intensity of the effect.
Parameter Explanation
DSK Settings
Adjusts the degree of extraction (transparency) for
DSK Level
the key.
Adjusts the degree of edge blur (semi-transmissive
DSK Gain
region) for the key.
Adjusts the fade-in/out time for the DSK video
Time
source.
* For details on the parameters, refer to "6: DSK" (p. 104).
6 .
Press the DSK 1 [PGM] button to turn on DSK compositing
(lit).
The composition results is sent to final output.
7 .
To turn off DSK compositing, press the DSK 1 [PGM] button
once again.
Turning DSK/PinP composition on/off in tandem
with video transitions
You can make DSK/PinP composition turn on/off in tandem with the
video transitions.
Ó
From the [MENU] button "System", set "Effects Transition Sync" to "ON".
After step 4, use the [AUTO] and [CUT] buttons to switch the video. DSK
composition turns on, and the composited result that is previewed is sent
to final output.