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3. Basic operations
3-3-7. Chroma key adjustments
How the chroma key is to be defined can be adjusted.
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Before proceeding with the adjustments, select “Chroma” as
the key type using the menu item below.
[4] KEY Setup Menu
1. Key Type
As the chroma key, a key signal is created using a specific
hue as a reference.
For instance, the key signal is created by detecting the color
of the background from the image of a person standing in
front of a specific background color, and another background
is combined.
This unit uses an area system whose area is designated
by a rectangular frame. The result of averaging the colors
of the pixels inside that area is used as the chroma key
reference color (key reference), and the maximum deviation
from the average value is used as the radius of the chroma
key oval.
Chroma keys faithful to the chroma space sample (area
in the figure) can be generated.
Y
Hue
Sat Radius
Chroma
Hue Radius
Oval-shaped chroma key
w Executing the sampling
automatically
By specifying the area where the background is to be
inserted, the chroma components are sampled.
qMaker
[6] ChromaKey Menu
1. Maker
This item is used to set the sample marker to ON to display
the marker on the PVW image.
qMarker Pos
[6] ChromaKey Menu
3. Marker Pos
This item is used to adjust the X coordinate, Y coordinate
and size of the sample marker.
qSample
[6] ChromaKey Menu
2. Sample
Press the OSD/TIME dial to sample the hue components of
the area selected by the sample marker.
p When sampling is completed, the image obtained by
combining the chroma key with the PVW image is output.
(Set the PVW function of the key to ON.)
p Sampling can be initiated without menu operations by
using the USER buttons and OSD/TIME dial.
USER1: X coordinate, USER2: Y coordinate
USER3: Size, USER4: Aspect ratio
Press the target USER button to light the button’s
indicator, and turn the OSD/TIME dial to adjust the
sample marker.
When the OSD/TIME dial is pressed, sampling is
initiated.