Adobe After Effects CS4 Bedienungsanleitung Seite 452

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USING AFTER EFFECTS CS4
Effects and animation presets
Last updated 12/21/2009
Original (left), and with effect applied (right)
This effect works with 8-bpc and 16-bpc color.
Radius How far the filter searches for dissimilar pixels to blur.
Threshold How different the values of pixels should be before they are eliminated.
Mode What parts of the image receive the blur. Normal specifies that the blur be applied to the entire selection,
whereas Edge Only and Overlay Edge specify that the blur be applied only to the edges of color transitions. Where
significant contrast occurs, Edge Only applies black-and-white edges, and Overlay Edge applies white.
More Help topics
About Blur & Sharpen effects” on page 440
Unsharp Mask effect
The Unsharp Mask effect increases the contrast between colors that define an edge.
Chris and Trish Meyer provide instructions on the ProVideo Coalition website for using the Unsharp Mask effect with
the CC Composite effect to sharpen an image without creating undesired color halo artifacts.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
Original (left), and with effect applied (right)
Radius The distance from the edge at which pixels are adjusted for contrast. If you specify a low value, only pixels near
the edge are adjusted.
Threshold The greatest difference between adjacent pixels for which contrast isn’t adjusted. A lower value produces a
greater result. A value that is too low causes contrast for the entire image to be adjusted and can generate noise or cause
unexpected results.
More Help topics
About Blur & Sharpen effects” on page 440
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