Chroma Key Composition And Basic Settings - Sony MVS-8000X User Manual

4
Select the combining pattern in the <Mix Pattern>
group.
Key Wipe: The wipe pattern selected for an
independent key transition is used for
combination. You can change this pattern by
pressing [Pattern Select] to open the menu for key
wipe pattern selection (Pattern Select menu), and
make adjustments by pressing [Pattern Adjust] to
open the menu for pattern adjustment (Wipe
Adjust menu).
Key Edge Pattern: Combine using the dedicated
pattern selected for the color mix in the key edge
fill. You can change this pattern by pressing
[Pattern Select] to open the menu for edge color
mix dedicated wipe pattern selection (Mix Pattern
Select menu), and make adjustments by pressing
[Pattern Adjust] to open the menu for pattern
adjustment (Matte Adjust menu).
For details, see "Carrying out a color mix for the
key edge fill matte" (page 101).
5
In the Type menu, adjust color 1 and color 2.
To adjust color 1, select [Color1], and to adjust color
2, select [Color2], then adjust the following
parameters.
Knob Parameter Adjustment
1 Luminance Luminance
2 Saturation Saturation
3 Hue
6
To interchange color 1 and color 2, press the [Color
Invert] button, turning it on.
Chroma Key Composition and Basic
Settings
In creating a chroma key image, either a normal mix or an
additive mix can be used. To select which, use the Type
>Chroma Adjust menu for the keyer.
Normal mix: The foreground is cut out with the key
signal, and then combined with the background, which
has also been cut out with the key signal.
Additive mix: The background, which has been cut out
with the key signal, is combined with the unshaped
foreground. This is effective for a natural-looking
composite when the scene includes glass or other
translucent objects.
Plane function
In an additive mix, the foreground is not shaped by the key
signal, and variations in the (blue) background appear in
the composite image. To prevent this, it is possible to set a
96
Key Setting Operations Using Menus
Setting values
0.00 to 100.00
0.00 to 100.00
Hue 359.99 to 0.00
particular luminance level for the background, and any
parts below this level are cut forcibly.
Composing an image by chroma keying
1
In the M/E-1 >Key1 menu, select HF1 'Type.'
2
Select [Chroma] in the <Key Type> group.
It becomes possible to adjust the key density (see page
93).
3
Select [Chroma Adjust].
The Chroma Adjust menu appears.
4
Carry out auto chroma key adjustments.
Also carry out manual adjustments if necessary to
obtain an optimum chroma key image.
5
In the <Mix Mode> group, select [Normal Mix] or
[Additive Mix] depending on the desired type of
chroma key composition.
When using an additive mix for chroma keying, the
(typically blue) background parts of the foreground video
must be converted to black. For this, use the color cancel
function (see page 98).
Using the plane function
In an additive mix, since no key is applied to the
foreground, any variations in the (typically blue)
background may appear in the composite image. To avoid
this, a particular luminance level can be set for the (blue)
background, and regions of lower luminance forcibly cut.
1
In the Chroma Adjust menu, set [Plane] on.
2
Adjust the following parameter.
Knob Parameter Adjustment
1 Luminance Luminance level 0.00 to 100.00
Setting values