Roland V-1HD+ - Compositing Subject and Background (Chroma Key)

30
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.
Background video
Blue or green
Video to be
superimposed
Adjusting the depth of compositing
1. Preview output the background video.
At the PVW section of the multi-view, check the video to be made
the background.
2. Press the [DSK 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 nal output has not yet been changed.
3. [MENU] button
0
“DSK”
0
select the menu item shown
below, and press the [VALUE] knob.
7 DSK SOURCE
Select the video that you want to superimpose.
Value Explanation
HDMI 1–4 Input video from the INPUT 1–4 connectors
STILL 1–4 A still image loaded into the unit (p. 20)
7 DSK TYPE
Set to “CHROMA.”
7 DSK LEVEL
Adjusts the degree of extraction for the key.
7 DSK GAIN
Adjusts the degree of edge blur for the key.
7 MIX LEVEL
Adjusts the key’s overall density (output level).
7 COLOR
Specify either “GREEN” or “BLUE” as the key color for chroma key
(the color to be removed).
4. Use the [VALUE] knob to change the value.
Congure the settings for each menu item while checking the
composited result.
5. Press the [MENU] button several times to close the menu.
Compositing using DSK
1. Press the [DSK ON] button to turn on DSK compositing (lit).
The composition results is sent to nal output.
2. To turn o DSK compositing, press the [DSK ON] button
once again.
Finely adjusting the key color (removed color)
You can make ne adjustments to the key color (the color that is
removed).
Use the [MENU] button
0
“DSK” to make the settings for the following
menu items.
Menu item Explanation
HUE WIDTH Adjusts the hue width.
HUE FINE Adjusts the center position of the hue.
SATURATION WIDTH Adjusts the saturation width.
SATURATION FINE Adjusts the center position of saturation.
Modifying the superimposed video
You can ll-in the superimposed video, or add an edge to it.
Use the [MENU] button
0
“DSK” to make the settings for the following
menu items.
Menu item Explanation
FILL TYPE
If this is set to “MATTE,” the superimposed video
is lled-in with the specied color.
The ll-in color is specied by “MATTE COLOR.”
MATTE COLOR
EDGE TYPE Species the type of edge.
EDGE COLOR Species the color of the edge.
EDGE WIDTH Species the width of the edge.
MEMO
5
Set the fade-in/out time for the video to superimpose from the
[MENU] button
0
“TRANSITION”
0
“DSK TIME.”
5
You can assign dierent functions to control with the [DSK
PVW] and [DSK ON] buttons (p. 41). If the USER indicator is not
lit, the buttons function as [DSK PVW] and [DSK ON] buttons.