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).
Key Setting Operations Using Menus
Select [Sample Mark] in the <Auto> group.
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Chroma Key Adjustments
There are two ways of making chroma key adjustments: automatically, using the auto chroma key function, or manually, making individual adjustments such as color cancel adjustments and window adjustments.
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.
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 383).
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.
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In the Chroma Adjust menu, set [Plane] on.
Adjust the following parameter.
| Knob | Parameter | Adjustment | Setting values |
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| 1 | Luminance | Luminance level | 0.00 to 100.00 |
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