The “Despeckle” filter is used to smoothen an image which has been scanned in from a magazine, newspaper, etc.  To despeckle an image, scan the image with a resolution high enough that you can see the individual speckles (dots).  Count the distance between the dots, and enter that into the “Dot Pitch” in Focus Magic before running the filter.

The despeckle filter is available in the stand-alone program but is not yet available in the plugin.

Scanned image with speckles or dots
Despeckled image
"Focus Magic is a remarkable piece of software. It's an honest-to-God real sharpening algorithm that works as a stand-alone program or a Photoshop plug-in. I'll spare you the math about how it works. What's important is that this is not a mere edge-enhancement routine like most so-called sharpening filters; this one actually undoes the blur."
Ctein (Photographer & Author)
Photographer, artist, author