Ross UltraChrome HR, Руководство пользователя, Страница: 15 / 47

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.
10.
Adjust the
Wedge Key Parameters
as follows:
• 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.
•
Bkgd Luma Suppress — use this setting to
compensate for uneven color or lighting in the
shot to ensure the chroma background is fully
suppressed.
Tip:
Turn on the box mask in the chroma key 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.
•
Highlight Correction — 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.
11. Adjust the Detail Key Parameters as follows:
•
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.
• Shadow Sensitivity — use this setting
to adjust the level of dark image areas,
particularly in cast shadow areas.
• Shadow Density — use this setting to
adjust the apparent lightness of the dark /
shadow areas in conjunction with the Shadow
Sensitivity .
• Highlight Sensitivity — use this setting
to fill areas with specular highlights, such as
reflective surfaces, that can show through to
the background.
12. Configure the Auto Adjust parameters as
follows:
•
Measurement Src
— click
Measurement
Src and select the video source that you are
going to be putting the chroma key over. The
chroma key engine uses this source to adjust
the edge area and re-spill values.
•
Auto Edge Luma — use the measurement
source to automatically calculate the edge
luma.
•
Auto Re-Spill Color — use the
measurement source to automatically calculate
the re-spill color. The color is based on the
average color of the measurement source.
13.
Adjust the Global Parameters as follows:
• Chroma Angle — use this setting to select
the fill color that has been detected as color
spill. You should not have to adjust this setting.
•
Edge Luma — use this setting to adjust the
luminance of the edges.
•
Edge Softness — use this setting to filter
the edges to eliminate undesirable hard edges
and add realism to a scene by simulating depth
of field characteristics.
• Re-Spill
— use the
Re-Spill Color
and
Re-
Spill Sat settings to select a color that is near
the average color of the background/lighting
that needs to be added into those areas of the
fill that contain the spill from the chroma set.
Carbonite Black UltraChrome User Manual (v1.0) — UltraChrome 2 Chroma Key Engine • 15