UMAX Technologies Astra 2000U - Manual (Page 47)

UMAX Astra 2000U/P Owner’s Guide
47
Changing the Descreen Feature
The Descreen option helps eliminate the patterns that can appear
when you scan printed images found in magazines, brochures,
catalogues, etc. (half-tone images). This is accomplished by
changing the number of lines that appear in every inch (lines per
inch) of the scanned image.
The Descreen feature is unavailable when you have chosen the B/W
Document, Fax or OCR resolution settings.
To change the Descreen setting:
1. Click the Descreen option to display the drop down menu.
2. Choose one of the descreen options:
No Descreen — No Descreening.
Magazine — Specifies 133 lines per inch. This option
smoothes the fine dot pattern found in glossy magazines.
Newspaper — Specifies 85 lines per inch. Smoothes the coarse
grain pattern commonly found in newspaper images.