Specifications

• Increasing the Gain value causes the
background to appear more opaque.
This results in less of the background
color being removed.
• Decreasing the Gain value causes the
background to appear more transparent.
This results in more of the background
color being removed.
9.
Adjust the edges of the foreground as follows:
a)
Use the Type knob to select Edge.
b)
Use the Value knob to add or remove edge
softening of the foreground image and alpha
channel.
• Increasing the Softness value increases
the amount of softness applied to the
foreground edges and alpha channel.
• Decreasing the Softness value
decreases the amount of softness
applied to the foreground edges and
alpha channel.
10.
Adjust the Foreground colors, or hues, as
follows:
a)
Use the Type knob to select Foregd.
b)
Use the Cntrl knob to select Clip.
c)
Use the Value knob to adjust the foreground
clipping.
• Increasing the Clip value removes
lower-saturated colors from the
foreground image.
• Decreasing the Clip value includes
lower-saturated colors in the
foreground image.
d)
Use the Cntrl knob to select Hue.
e)
Use the Value knob to select the central
(base) color for the foreground.
• Increasing the Hue value moves
counter-clockwise around the color
wheel to select a base color.
• Decreasing the Hue value moves
clockwise around the color wheel to
select a base color.
f)
Use the Cntrl knob to select Reject.
g)
Use the Value knob to include or reject hues
adjacent to the base color.
• Increasing the Reject value decreases
the amount of adjacent hues that are
included in the foreground.
• Decreasing the Reject value increases
the amount of adjacent hues that are
included in the foreground.
11.
Adjust the amount of background color that is
spilling over into the foreground as follows
(green color cast on the foreground from a green
screen for example):
a)
Use the Type knob to select Spill.
b)
Use the Value knob to remove any color cast
onto the foreground.
• Increasing the Range value causes more
of the foreground colors to be corrected
for background color spill.
• Decreasing the Range value causes
fewer of the foreground colors to be
corrected for background color spill.
12.
Press NEXT.
13.
Use the Mask knob to apply a mask to the key.
Chroma Key Advanced Mode
An UltraChrome chroma key, in advanced mode, breaks
the image into ve elements which determine, or partially
determine, which part of the image is keyed out, or
removed.
• Background — Background elements are those
pixels in the source video that are the same color
as the one you chose to key out. Note that the
Shadow and translucent areas (see below) are
completely contained within the Background area.
• Shadow — Shadow elements are those pixels in
the source video with colors that are within the
Background range, but with lower luminance
values, depending on the shadow range. You
modify the Shadow range to cover darker areas of
the background (e.g. where the foreground is
casting a shadow on the background screen).
• Translucency — Translucent elements are those
pixels in the source video that are in the
Background range, but with higher luminance
values than the Shadow range. You can control the
upper-end of the Translucency range by setting a
wider hue-range to constrain the area. You can also
control the transparency of the Translucent area.
• Transition — Transition elements are those pixels
in the source video with colors that are not within
any of the previous three ranges and are also not
32 • Keying — Carbonite Operation Manual (v8.0)