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Chapter 6: Unsharp Masking 6-7
Customizing the Descreening Function
The blue triangle next to Custom Settings toggles open an additional area of the
Descreening window for customizing PowerColor’s descreening function. The
options for customization are defined as follows:
• Smoothness: performs the same function as the Smooth field in the Unsharp
Masking window (see above). The value entered in this field is reflected in
the USM window.
• Final Scans Only: applies descreening only to the final image to be scanned,
but not to any prescans.
• Scale USM: limits the degree of unsharp masking applied to the final image.
To use the option, click on the checkbox next to Scale USM and enter the
percentage by which you want USM reduced. Since descreening “softens” the
focus of an image, the Scale USM option is helpful because it helps to avoid
“over sharpening” the image again by applying an excessive amount of
unsharp masking.