Median Alpha
 
 
 

The Median Alpha tool is almost identical to the Median Tool (see Median Tool) and is excellent for removing impulse noise, but is designed to operate on the alpha channel of the input image.

It has all the parameters of the Median tool except for the Criteria parameter, which is not needed because this tool always computes the median value by ranking the alpha value of each pixel.

NoteThis tool affects only the alpha channel.