Chapter 4 Keys
221
Key Setting Operations Using Menus
You can use the Y balance function independently on the key signal for the
composition and the key signal for the color cancel function. When applied to
the key signal for the composition, this produces the foreground with the color
cancel effect applied. This can therefore be used to provide an impression of
smoke, for example.
When the Y balance function is applied to the color cancel key, the relevant
part is output in its original color without canceling, and therefore it is possible
to combine colors which are the same color as the background (i.e. typically
blue) in the foreground.
Chroma key shadow
This function provides a more realistic treatment when the shadow of an object
in the field of view falls on the blue background. Since parts of the blue
background darker than a specified intensity are treated as shadows, there is no
effect on cutting out of the foreground.
Video signal adjustment
You can vary the foreground signal gain, or change the hue. There are separate
adjustments for the gain of the overall video signal, and Y and C components.
Making auto chroma key adjustments
Auto chroma key is an automatic adjustment function which allows you to
specify a part of the foreground video (for example, the blue background color)
and use it as a reference for creating the chroma key image.
1
In the M/E-1 >Key1 menu, select HF1 ‘Type,’ then select [Chroma] in the
<Key Type> group.
2
Select [Chroma Adjust].
The Chroma Adjust menu appears.
3
Select [Sample Mark] in the
<Auto> group.
The foreground video only appears on the monitor, with a white box-
shaped sample selector.
4
Adjust the position and size of the sample selector, to specify the color to
be used as the basis of chroma keying (typically a blue background).
Knob Parameter Adjustment Setting values
1 Position H Horizontal position
–100.00 to +100.00
a)
2 Position V Vertical position
–100.00 to +100.00
a)
3 Size Size 1.00 to 100.00
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