Microtek ScanMaker 4700 User Manual page 73

Filters
Before
Unsharp Mask filter
The Unsharp Mask filter adjusts the contrast of edge detail and creates the
illusion of more image sharpness. This filter can be useful for refocusing an
image that has become blurry from interpolation or scanning. You can
choose the predefined Unsharp Mask filters in the Setting window for use,
or customize the Unsharp Mask filters by yourself.
The dialog box below appears when you choose Unsharp Mask from the
Filter menu to customize.
The Mask Size determines the depth of surrounding pixels that will be
affected. The larger the mask size, the stronger the sharpening effect of
the filter.
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After