User Manual

Table Of Contents
Primatte Tab
The core functionality for Primatte is found in the Primatte tab. The basic workflow is based on
selecting one of the operational mode buttons and then scrubbing over areas in the viewer.
Lock Color Picking
Activate this button once you finished adjusting your key to prevent making accidental changes
in the viewer.
Auto Compute
The Auto Compute button is likely the first button pressed when starting to key your footage.
Primatte automagically analyzes the original foreground image, determines the backing color,
and sets it as the central backing color. Then, using that information, another analysis
determines the foreground areas. A Clean FG Noise operation is performed using the newly
determined foreground areas, and Primatte renders the composite.
NOTE: The Auto Compute button may make the next three buttons—Select
Background Color, Clean Background Noise, and Clean Foreground Noise—
unnecessary and make your keying operation much more straightforward. Clicking
Auto Compute automatically senses the backing screen color, eliminates it, and even
gets rid of some foreground and background noise. If you get good results, then jump
ahead to the Spill Removal tools. If you don’t get satisfactory results, continue from this
point using the three buttons described below.
Select Background Color
Clicking the Select Background Color button allows you to select the screen color by scrubbing
in the viewer. It uses the traditional Primatte method of taking the sampled backing screen
color, projecting a line in the opposite direction on the hue wheel, and generating artificial
pixels that may represent the FG object. Then, using the artificially generated foreground pixels,
it internally does the Clean FG Noise operation and creates the shape of the middle and outer
polyhedrons. It then renders the composite using these generated polyhedrons. This does not
automatically use the Adjust Lighting functionality, as it must be selected in a separate
operation.
Clean Background Noise
Clicking this button helps to remove any white regions in the dark screen area (“noise”), or
shades of the screen color that did not get picked up on the first sample. Once you click the
button, scrub the mouse pointer over areas in the viewer to sample white-ish noise regions.
Clean Foreground Noise
If there are dark transparent regions in the middle of the mostly white opaque foreground
object, click the Clean Foreground Noise button and scrub over the dark pixels in the
foreground area until that area is as white as possible.
Spill Sponge
The Spill Sponge is the quickest method for removing color spill on your subject. Click the Spill
Sponge button and scrub the mouse pointer over a screen color pixel, and the screen color
disappears from the selected color region and is replaced by a complementary color, a
selected color, or a color from a replacement image. These options are set in the Replace tab.
Additionally, use the tools under the Fine Tuning tab or use the Spill(+) and Split (-) features to
adjust the spill.
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