Chroma Key Adjustments - Sony DVS-9000 System User Manual

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.
For the adjustment procedures, see page 159.
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 162).
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
1

Chroma Key Adjustments

Methods of adjusting the composite obtained from chroma keying include
automatic adjustment with the auto chroma key function, and manual
adjustment carrying out the necessary processing separately. The optimum
results will be obtained by first carrying out adjustments with the auto chroma
key function, then making any fine adjustments as required.
The following manual adjustments are possible.
Key active
When this function is off, only the foreground is output and you can make
adjustments of color cancel (see the next paragraph).
Parameter Adjustment
Luminance Luminance level
Setting values
0.00 to 100.00
Key Setting Operations Using Menus
159