Median Mask command

Use this command to remove small random specks of noise that are distinctly different from the surrounding area.
The intensity of each pixel is adjusted to the median intensity of surrounding pixels. The median intensity is the middle value (not the average) in the range of values.
To preserve object edges, the Median Mask command adjusts a pixel that is very different from surrounding pixels more than a pixel that is similar to surrounding pixels.
You can choose the number of surrounding pixels to use in the calculation. If you choose a large number of pixels, more noise is removed, and so more detail is lost.