Ross CrossOver 16, Operator'S Manual, Page: 40 / 92

3–8 • Basic Operation CrossOver 16 User Manual (v4.0)
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.
The remaining three adjustments that can be made to
an Advanced UltraChrome chroma key allow you to
adjust spill suppression, edge softness and
luminance.
• Spill Suppress — Spill Suppression elements are
those pixels in the Foreground that have a
noticeable tint of the Background color. This
typically occurs around the edge of the foreground
subject as glow from the background blue-screen
or green-screen “spills” onto them.
• Edge Softness — Edge Softness lets you apply
varying degrees of softening to the Foreground
edges to help it blend in with the underlying
background image that it is being keyed over.
• Luminance — Luminance allows you to control
the overall brightness of Shadow, Translucency,
and Transition areas as well as partial reflections
to more closely match the Foreground brightness.
To adjust the chroma key in Advanced Mode:
1. Select the key you wish to modify (ensure it is
set as a Chroma key).
2. Press NEXT .
3. Adjust the Background as follows:
• Use the Type knob to select Bkgd .
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.
• Use the
Cntrl
knob to select
NegHue
.
• Use the
Value
knob to adjust the range of
hues that are included in the Background,
expanding counter-clockwise around the
color wheel.
• Use the Cntrl knob to select PosHue .
• Use the Value knob to adjust the range of
hues that are included in the Background,
expanding clockwise around the color wheel.
• Use the Cntrl knob to select Sat .
• Use the
Value
knob to adjust the
saturation range of the background color as
follows:
› Increasing the Saturation Range value
includes a wider range of saturation values
to be included in the background.
› Decreasing the Saturation Range value
includes a narrower range of saturation
values to be included in the background.
4.
Adjust the edges of the foreground as follows:
• Use the
Type
knob to select
Edge
.
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.
• Use the
Cntrl
knob to select
Sens
.
• Use the
Value
knob to set the edge
sensitivity as follows:
› Low — Select this option to reduce the
level of detail in the edges of the chroma
key. This option will reduce 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
— Select this option to include the
maximum detail in the edges of the chroma
key.
• Use the
Cntrl
knob to select
Soft
.
• Use the
Value
knob to add or remove
edge softening of the foreground image and
alpha channel as follows:
› Increasing the Softness value increases the
amount of softness applied to the
foreground edges and alpha channel.
NEXT