• Edge Softness — Allows you to adjust the amount
of edge softening applied to the foreground. This
helps blend the foreground into the new background.
• Foreground Clip/Hue/Reject — Allows you to
modify the range of colors that are considered
foreground and are not masked.
• Spill Range — Allows you to remove background
color casts that may spill into the foreground image
(green color cast on the foreground from a
green-screen for example).
To Set Up a Chroma Key in Basic Mode
The UltraChrome chroma key tries to automatically
adjust for the scene you are trying to chroma key. For
the best results, initialize the key rst, and then identify
the areas where you need to adjust the key.
1.
Select the keyer that you want to set up an Chroma
Key on. Click Navigation Menu > Live Assist
> ME and select the ME and key that you want to
set up.
Note: You can use the same procedure for a MiniME
™
.
2.
Select the video signal, on the key bus, that you want
to use for the key. Click Key Fill and select the
video signal you want to use for the key.
3.
Press CHR KEY. Click Chroma Key.
Tip: Press and hold SHOW ALPHA (C1M, C2M, C2S,
C2X, and C3X only) to have the preview output of the
current ME switch to the alpha signal that is being used by
the selected keyer. Double press the SHOW ALPHA button
to lock show alpha on and press it again to release it. Show
alpha is not available for MiniME
™
outputs.
4.
Use the Mode knob to select Basic. Click Basic.
5.
Use the Color knob to select the color you want to
key out. Click the Color button for the color you
want to key out.
6.
Press the Init knob to initialize the chroma key. Click
Init to initialize the chroma key.
Every time the key is initialized, the switcher resets
all the Chroma Key parameters to their default
settings.
7.
Press NEXT.
8.
Use the Type knob to select Additv and the Value
knob to turn additive keying on or off. Click an
Additive Keying button to turn it on or off.
•
Off — 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.
•
On — Include the maximum detail in the edges
of the chroma key.
9.
Use the Type knob to select Bkgd and use the
Value knob to adjust the background gain. Use the
Background Gain slider to adjust the background
gain.
• 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.
10.
Use the Type knob to select Edge and use the
Value knob to add or remove edge softening of the
foreground image and alpha channel. Use the Edge
Softness slider 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.
11.
Use the Type knob to select Foregd.
12.
Use the Cntrl knob to select Clip and use the Value
knob to adjust the foreground clipping. Use the
Foreground Clip slider 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.
13.
Use the Cntrl knob to select Hue and use the Value
knob to select the central (base) color for the
foreground. Use the Foreground Hue slider 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.
14.
Use the Cntrl knob to select Reject and use the
Value knob to include or reject hues adjacent to the
base color Use the Foreground Reject slider 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.
38 • Keying — Carbonite Operation Manual (v13.0)
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