Descreen - Microtek ScanWizard EZ Reference Manual

Descreen

(for Reflective mode only)
The Descreen tool lets you remove moiré patterns in the scan process. Moirés
occur when you scan a screened original (mostly reflective materials, such as
pictures from a newspaper or magazine). These patterns appear to the naked
eye like a series of grids or dots, as shown in the example below .
Using the Descreen:
1. Click the Descreen drop-down menu in the Settings window .
2. When the Descreen menu comes up, select the screen for your needs, or
choose Custom to set your own descreen options.
When the Descreen dialog box comes up, enter a value that best
corresponds to the dot quality of the original in which the moiré is to be
removed. You may use a screen finder to measure the print screen lpi.
Please contact your local print shop for more information on how to obtain
a screen finder.
• Set a value from 50 to 85 if the original image has a coarse dot pattern,
as in images taken from a newspaper.
• Set a value from 100 to 133 if the original image has a fine dot pattern,
as in images taken from a magazine.
• Set a value from 200 to 250 if the original image has a very fine dot
pattern with a near-photographic quality, as in images taken from a
high-quality art magazine.
Microtek ScanWizard EZ - Professional Mode Reference Manual 65