Product manual

Chroma Key Basic Mode
The following chroma key parameters can be adjusted
in Basic Mode:
• Background Area — Allows you to modify the
range of colors that are considered background and
are masked out of the Chroma Key.
• Edge — Allows you to adjust the amount of edge
softening applied to the foreground. This helps
blend the foreground into the new background.
• Foreground Area — Allows you to modify the
range of colors that are considered foreground and
are not masked.
• Luminance — Allows you to adjust the overall
brightness of the shadow, translucent, and
foreground-background transition area to improve
the Chroma Key appearance.
• Shadow — Allows you to adjust the amount of
shadow extraction from the background. This is
the actual shadow that the foreground subject is
casting onto the screen.
• Spill — 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).
• Foreground - Background Transition Gain —
Allows you to adjust the transparency of the
foreground - background transition area. This helps
blend the foreground into the new background.
• Translucency — Allows you to adjust the size and
transparency of translucent, or semi-transparent,
areas.
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 first, and then identify
the areas where you need to adjust the key.
1.
Select the keyer that you want to set up a basic
Chroma Key on.
2.
Select the video signal on the key bus that you
want to use for the key.
3.
Press CHR KEY.
4.
Use the Mode knob to select Basic.
5.
Use the Color knob to select the color you want
to key out.
6.
Press the Init knob to initialize the chroma key.
Every time the Init knob is pressed, the switcher
resets all the Chroma Key parameters to their
default settings.
7.
Press NEXT.
8.
Adjust the Background as follows:
a)
Use the Type knob to select Bkgd.
b)
Use the Value knob 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.
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.
a)
Use the Cntrl knob to select Hue.
b)
Use the Value knob to select the central, or
base, color for the foreground.
• Increasing the Hue value moves
counter-clockwise around the color
wheel to select a base color.
Carbonite Operation Manual (v6.1) — Keying • 25