Adobe After Effects - Manual (Page 472)

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Radius
Threshold
Mode
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Radius
The Sharpen effect increases the contrast where color changes occur. The quality setting of the layer doesn’t affect Sharpen.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
Original (left), and with effect applied (right)
Smart Blur effect
The Smart Blur effect blurs an image while preserving lines and edges within the image. For example, you can use the Smart Blur effect to
smoothly blur shaded areas while retaining crisp outlines of text and vector graphics.
Original (left), and with effect applied (right)
This effect works with 8-bpc and 16-bpc color.
How far the filter searches for dissimilar pixels to blur.
How different the values of pixels should be before they are eliminated.
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.
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)
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.
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