Apple Motion 2 - Manual (Page 761)

Chapter 10 Using Filters 761
Parameters in the Inspector
Color: Picks the color for your key. Use the disclosure triangle to display Red, Green,
Blue, and Alpha sliders for more precise color selection.
Tolerance: Sets the color tolerance for your key. Values range from 0 to 1.
Invert Matte: Toggles whether or not the alpha channel of your color key is inverted.
Dashboard controls
The Dashboard contains the same controls as the Inspector.
Luma Key
Luma Key pulls a key from your object based on a selected brightness level. This can be
effective if you’re keying a subject that was shot against a solid white or black
background, and exposed so that there are no absolute highlights or shadows within
the foreground subject. Despite this, shadows and highlights in the image usually
make this a difficult filter with which to pull a perfect key.
Parameters in the Inspector:
Key Mode: Sets the mode used to calculate the luminance value of your object. The
modes can be selected from the following: Key Out Brighter, Key Out Darker, Key Out
Similar, or Key Out Dissimilar.
Luminance: Sets the type of luminance that is keyed. The types can be selected from
the following: NTSC, PAL, Film, Red, Green, and Blue.
Threshold: Sets the threshold of the key. Values range from 0 to 1.
Tolerance: Sets the tolerance of the threshold. Values range from 0 to 1.
Dashboard controls
The Dashboard contains the same controls as the Inspector.
Primatte RT
The Primatte RT filter is a high-quality keying filter, which renders the blue or green
areas of the image transparent, allowing one or more background images to show
through.
Parameters in the Inspector
Output Type: Sets the output type of the keyer. Select values from the following:
Foreground, Background, Processed Foreground, and Matte.
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