C2-7000 S
ERIES
O
PERATION
M
ANUAL
44
(XGA is 1024x768)
You will see that the Swap between foreground and background has no effect
on the output resolution as this is always set by the Lock source.
The Min/Max parameters are used to select what range of Y (luminance/grey-
scale) values are made transparent within the selected window/lock source.
In order to key out part of an image, start with the max value and increase it
until the required lighter parts within the window/lock source disappear. Then
adjust the min level to bring back any darker parts of the image.
The Y Key softness option removes noise from the keyed image, generally at
the edges. Adjust as required to make the edges of the key as sharp or as
soft as desired. The noise is where the analog to digital process (A/D
conversion) may not sample a 50% brightness as being exactly 50% i.e.
sometimes 49% and sometimes 51%. Increasing the softness value will
broaden the range of keyed colors so that the keying of images varies
depending on how close a color is to the keyed-out range.
The Y Key invert changes the keying characteristics with respect to what
colors of the foreground image you wish to ‘key out’.
Setting it to Off will cause the colour range that’s defined to be removed -
remove the desired colours. Setting it to On will cause the colour range that’s
defined to be kept - key out all other colours.
The descriptions above behave identically on the remaining U Key Invert & V
Key Invert component versions. However they are directed at the U/B-Y (blue)
colour component and V/R-Y (red) colour components respectively.
Adjustment and effects are the same as explained above for Y Key Invert
(brightness/grey-scale).
8.7
Edge Blend items within the Adjust keyers group
Please also see the section titled ‘EDGE BLENDING SETUP’ later in this
manual.
Adjust keyers
Y Key min/max [ 0] [ 32]
Adjust keyers
Y Key softness [ 0]
Adjust keyers
Y Key invert [Off]
Содержание C2-7000 Series
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