Epson 600 - Manual (Page 59)

Advanced Scanning
Page 52
such as losing resolution or
sharpness. To counter the effect of
the screen process and turn the dots
back into a smoother image, set the
filter option to Descreen.
If you use the descreening filter, don’t
enlarge the image as this could
cause a moiré effect— strange
patterns that appear in an image due
to the spacing between bands of dots
in the image.
You may need to sharpen the image
after descreening, but you will need
to do so in your graphics application.
None Select this option if you don’t want to
use any filter.
Changing Image Resolution
Resolution refers to how many dots per inch (dpi) or
dots per centimeter (dpcm) a device can print or scan.
TWAIN.bk : advanced.fm5 Page 52 Monday, September 8, 1997 2:06 PM