User Manual

Table Of Contents
Clean Foreground Noise
If there are dark regions in the middle of the mostly white foreground subject, the key is not
100% in those areas. Using Clean Foreground Noise can make the matte as white as possible.
1 Keep the View Mode menu set to Black and the viewer set to the Alpha Channel.
2 Click the Clean Foreground Noise button.
3 Drag the mouse pointer through these dark pixels in the foreground that should be
pure white.
Primatte processes the selection and eliminates the noise.
4 Repeat this procedure as often as necessary to clear the noise from the
foreground areas.
5 If enabled, disable Gain/Gamma from the viewer’s Options menu to return to a
regular viewer.
Removing Spill
The first three sections created a clean matte. At this point, the foreground can be composited
onto any background image. However, if there is color spill on the foreground subject, a final
operation is necessary to remove that screen spill for a more natural-looking composite.
1 From the View Mode menu, select Composite.
2 Above the viewer, click the Alpha/RGB toggle button to see the RGB image.
There are two ways in Primatte to remove the spill color:
Spill Sponge
Fine Tuning Tab
Spill Sponge
The quickest method is to select the Spill Sponge button and then sample the spill
areas away. Additional spill removal can be done using the tools under the Fine Tuning
tab or by using the Spill(-) button.
Fine Tuning Tab
To use the Fine Tuning tab for spill, first scrub over the spill color in the viewer. For most
images, adjusting the Spill slider is all that is required to remove any remaining spill.
NOTE: When using the slider in the Fine Tuning tab to remove spill, spill color
replacement is replaced based on the setting of the Spill Replacement options.
You can use the other two sliders in the same way for different key adjustments. The
Detail slider controls the matte softness for the color that is closest to the background
color. For example, you can recover lost rarefied smoke in the foreground by selecting
the Fine Tuning mode, clicking on the area of the image where the smoke starts to
disappear and moving the Detail slider to the left. The Transparency slider controls the
matte softness for the color that is closest to the foreground color. For example, if you
have thick and opaque smoke in the foreground, you can make it semitransparent by
moving the Transparency slider to the right after selecting the pixels in the Fine
Tuning mode.
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