•
Decreasing the gain value causes the
background to appear more transparent. This
results in more of the background color being
removed.
9.
Use the
Type
knob to select
Edge
.
10.
Use the
Cntrl
knob to select
Sens
and use the
Value
knob to set the edge sensitivity.
•
Low
— Reduces the level of detail in the
edges of the chroma key as well as the overall
noise in the key image that can be the result
of certain lighting conditions or high detail
camera settings. This is the default setting.
•
High
— Include the maximum detail in the
edges of the chroma key.
11.
Use the
Cntrl
knob to select
Soft
and 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.
12.
Use the
Type
knob to select
Foregd
.
13.
Use the
Cntrl
knob to select
Clip
and 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.
14.
Use the
Cntrl
knob to select
Hue
and 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.
15.
Use the
Cntrl
knob to select
Reject
and 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.
16.
Use the
Type
knob to select
Spill
and 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.
17.
Press
NEXT
.
18.
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 five 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
considered part of the Foreground area. These are
typically the pixels near the edge of the foreground,
where it blends into the background.
•
Foreground
— Foreground elements are those
pixels that are not within the Background, Shadow,
Translucency, or Transition ranges. This is the area
with colors that will not be keyed out and will
remain solid.
Carbonite Operation Manual (v10.1) — Keying •
35
