1T-C2-750 & 1T-C2-760 O
PERATION
M
ANUAL
36
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 colors. Setting it to On will cause the colour range that’s defined to be
kept - key out all other colors.
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).
8.6
Items Associated with the Adjust sources group
The ‘Adjust Sources’ menu group accesses the parameters associated with the
processing amplifiers used for each input (RGB, CV, YC, etc.). They allow you to
fine-tune an incoming signal to optimize its color, brightness or even sharpness.
Not all settings are available for all input types, and not all input types listed here
may be available on your unit. Also note that many of these adjustments may not
show without ‘Advanced menus’ set to On.
It is recommended that you Store your settings once you’re happy with them in
readiness for future use.
Adjust keyers
Y Key min/max [ 0] [ 32]
Adjust keyers
Y Key softness [ 0]
Adjust keyers
Y Key invert [Off]
