User`s guide

5-55Reference
Descreen
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),
and these patterns appear to the naked eye like a series of cross-hatching lines, as shown in the
example below.
To use Descreen:
1. Click the Descreen tool.
2. 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.
Before Descreen
After Descreen