Epson 660 - Manual (Page 44)

Blur/Sharpen
You can drag the slider to blur or sharpen the image: drag the slider to the left to blur the image and to
the right to sharpen the image.
Descreen
If you are scanning images from magazines, newspapers or other printed materials, you will find that the
scanned image appears to be covered by tiny screen patterns. To eliminate this screen pattern, you can
use the options in the drop-down list box. You can select an appropriate descreen option according to the
original to be scanned from the drop-down list box.