Matte Choker

The BCC Matte Choker filter is a tool for the often frustrating task of
adjusting mattes that are not quite right. A first-pass matte often has
unwanted holes in areas that should be opaque, and/or unwanted spots in areas
that should be transparent. These problems can usually be fixed with Matte
Choker.

BCC Matte Choker uses an iterative technique to process the source alpha
channel. In other words, the filter applies one stage of the process to the
source image, then applies a second stage to the output of the first stage, and
repeats the process using the output of each iteration as the input of the
next.

To learn more about this filter, and see a breakdown of the various controls,
please click here.