Chapter 5
Chroma Keying
5-29
Adjusting the Y balance
In conventional chroma keying, the key signal is formed using the chroma
component alone, and therefore if there are portions of the foreground of the
same hue they will all be replaced by the background video. Using the Y
balance function, however, it is possible to restrict the replacement to a
specified intensity range even for the matching hue.
It is possible to use the Y balance function separately for the key signal for
combination and to the key signal for the color cancel function. When used
for the key signal for combination, the foreground becomes such that the
color cancel effect has been applied to it. This is therefore useful when, for
example, there is smoke in the video image.
When the Y balance function is used for the color cancel key, the original
color of the relevant portions is not canceled and appears, so that foreground
colors akin to the background color (blue) can be combined with the
background.
For the Y balance adjustment for the color cancel key, see the previous page.
Use the following procedure to adjust the Y balance for the key signal for
combination.
1
In the ADJUST menu, press F8 (Y BAL), turning it on.
This turns the Y balance function on.
2
Adjust the parameters.
Knob
Parameter
Setting
1
Clip
Set the reference level for the cut out color (0.00 to
100.00)
2
Gain
Set the key gain (0.00 to 100.00)
3
Luminance
Set luminance (0.00 to 100.00)
Summary of Contents for DVS-7300
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Page 73: ...Menu Organization 3 2 Basic Menu Operations 3 6 Chapter 3 Basic Menu Operations ...
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Page 555: ...Appendixes A 3 Enhanced Wipes 21 23 24 26 27 29 49 300 301 302 303 304 POLYGON ...
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Page 606: ...Sony Corporation B P Company 1999 11 1999 BZS 7021A WW A ADZ 600 01 1 ...