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Table Of Contents
Key Effects
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Understanding SpectraMatte Analysis Displays
The SpectraGraph
display for the SpectraMatte effect shows how the effect operates on the
entire CbCr color space. This helps you see how the effect is working and what further
adjustments you might need to make.
You can also display the alpha matte that the effect is generating. This lets you see clearly which
pixels from the foreground image are being keyed in or out, and how pixels on the edge of the
matte are being blended.
You can display these analysis views in either the Effect Preview monitor or in the Source
monitor. If you display them in the Effect Preview monitor, they replace your view of the
composite image created by the effect itself until you turn the analysis display off. If you display
them in the Source monitor, you can see the analysis and the composite image at the same time.
The SpectraGraph Display
The SpectraGraph display shows a color swatch that represents the entire CbCr color space with
which the SpectraMatte effect works. You activate the SpectraGraph display using controls in the
Matte Analysis category in the Effect Editor. For more information, see “Key: SpectraMatte
Effect” on page 586.
The center point of the swatch is neutral gray while the outer areas show highly saturated color.
This representation of color is similar to that in the ChromaWheel color wheels in the Color
Correction tool. Hue changes as you move around the swatch and saturation increases as you
move away from the center. The following illustration shows this swatch.
The range of colors that the SpectraMatte effect is currently keying out from your foreground
image is also keyed out from this swatch, revealing a black background in its place. The range of
colors that the effect is currently retaining from the foreground image appears as fully opaque
color. The range of colors that the effect is currently blending between foreground and