The BCC Alpha Process filter blurs the alpha channel of an image, performs
levels and gamma correction on the output of the blur, and composites the
output alpha with the initial alpha using the chosen apply mode. The filter
also allows you to soften the matte by blurring the alpha channel after it is
The built in PixelChooser, with integrated mocha planar tracking allows for
greater control over which areas of the image the filter should affect.