Ross Carbonite Black Series, Руководство по эксплуатации, Страница: 34 / 64

1. Select the chroma key engine that you want to use.
Tip:
You can either press the user select button
assigned to the chroma key, press and hold the CHR
KEY
button and press the corresponding keyer button, or
press the chroma key source button on the key bus.
2. Press the source button on the key bus for the
video feed you want to apply the chroma key to.
Note: You can only select a physical input, Media-Store,
or MediaWipe for a chroma key. You can also select an
Aux Bus, but the source selected on the Aux Bus must be
valid for the chroma key.
3.
Use the Color knob to select the color of the
background you are using for your chroma key.
4.
Press Init .
The chroma key engine initializes and attempts to
remove the selected background color from the
video. Any further adjust is only required if you
want to adjust aspects of the key.
5.
Press NEXT .
6.
Use the Key Type knob to select the chroma key
mode you want to use.
•
Wedge — Based on the standard chroma
keyer and discriminates between the color
vector angle and level of the background
color vs the color vectors and levels in the
foreground components.
• Detail — Differs from the standard chroma
keyer in that it adds luminance dependency
to a three-dimensional spherical color
discriminator.
•
Combination — Combine the two modes
to offer good capture of high luma detail in
the edge regions as well as compensation for
similar foreground and background levels.
Note:
All adjustments are always available, even if the
are not applied by the selected mode.
7.
Press NEXT .
8.
For Wedge Type, use the Type knob to select
Wedge and the Cntrl and Values knobs to
adjust the parameters.
•
Gain — use this setting to set the Angle
Control to
100
and the Lift to
0
and then
adjust this setting until the background is fully
removed, leaving a reasonable edge to the
key. Too much gain will produce hard and
undesirable edges.
Tip:
Adjust the
Gain
with the
Bkgd Luma Suppress
to balance between background removal and edge
quality.
•
BkLuma — use this setting to compensate for
uneven color or lighting in the shot to ensure
the chroma background is fully suppressed.
Tip:
Turn on a box mask in the keyer you are
using to view the chroma key output to compare
the backgrounds. The masked area shows the
background source without the key settings applied.
• Angle — use this setting to change the
color wedge angle (wedge shape) that is
used to detect areas of foreground (fill) and
background (alpha) based on the chosen color
vector. This can help fill in areas of heavy spill
without hardening edge detail.
•
Lift — use this setting to amplify the generated
alpha signal to fill in areas of transparency.
•
HiCorr — use this setting to lift areas of the
image might contain high luminance levels at
edge boundaries. This could be due to lighting
conditions, camera setup, or subject.
9.
For Detail Type, use the Type knob to select
Detail and the Cntrl and Values knobs to adjust
the parameters.
•
Clip — use this setting to clip between the
foreground and background. You are looking
to achieve complete background removal.
Tip:
Clip should be set to the point where the
background is just removed. Setting it too high will
reduce edge quality.
•
Gain — use this setting to lift the fill image.
You are looking to achieve solid fill content.
Tip:
Setting the gain too high may introduce dark
boundaries.
• ShSens — use this setting to adjust the
level of dark image areas, particularly in cast
shadow areas.
• ShDens — use this setting to adjust the
apparent lightness of the dark / shadow areas in
conjunction with the Shadow Sensitivity .
• HiSens
— use this setting to fill areas with
specular highlights, such as reflective surfaces,
that can show through to the background.
34 • Keying — Carbonite Black Operation Manual (v14.0)