Simple Choker Effect (Pro Only); Noise & Grain Effects; Add Grain Effect - Adobe AFTER EFFECTS 7.0 Manual

ADOBE AFTER EFFECTS 7.0
467
User Guide
Original (left) shows areas of unwanted transparency after using Color Key (center) that are removed with Matte Choker (right).
See also
"To close a hole in a matte (Pro only)" on page 282

Simple Choker effect (Pro only)

The Simple Choker effect shrinks or expands the edges of a matte in small increments to create a cleaner matte. The
Final Output view displays the image with the effect applied, and the Matte view provides a black-and-white view of
the image with black areas indicating transparency and white areas indicating opacity. Choke Matte sets the amount
of choke. Negative values spread the matte; positive values choke it.
This effect works with 8-bpc and 16-bpc color.
The original (left) contains unwanted edges after keying (center) that are removed with Simple Choker (right).
Noise & Grain effects

Add Grain effect

This effect works with 8-bpc and 16-bpc color.
Original (left), and with effect applied (right)
See also
"Adding grain or visual noise to an image" on page 362
"Working with added or matched grain" on page 363