UMAX mx3 用户指南
UMAX Astra MX3 Owner’s Guide
29
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. This is
accomplished by changing the number of lines that appear in every inch (lines
per inch) of the scanned image.
scan printed images found in magazines, brochures, catalogues, etc. This is
accomplished by changing the number of lines that appear in every inch (lines
per inch) of the scanned image.
Note: The Descreen feature is unavailable when you have chosen the B/W
Document, Fax or OCR resolution settings.
Document, Fax or OCR resolution settings.
To change the Descreen setting:
1.
Click on the Descreen option to display the pop-up menu.
2.
Select 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.
dot pattern found in glossy magazines.
••
Newspaper - Specifies 85 lines per inch. Smoothes the coarse grain
pattern commonly found in newspaper images.
pattern commonly found in newspaper images.
••
Art print - Specifies 175 lines per inch. Smoothes the fine dot pattern
found in high quality art prints.
found in high quality art prints.
••
Custom - This option opens a slider control where you can set any lpi
from 50 to 400. Click and drag on the slider to change the setting and
click on the OK button.
from 50 to 400. Click and drag on the slider to change the setting and
click on the OK button.
Changing the Filter Setting
Image filters are used to soften or sharpen edges and boundaries of an image.
VistaScan provides the following filter options:
••
No Filter - Use this option when you do not want to sharpen or blur the
image.
image.
••
Sharpen - Sharpens lines that may be fuzzy or not clean in the original
image.
image.
••
Sharpen More - Sharpens the image more than the standard Sharpen
filter does.
filter does.
••
Blur - Softens the edges of an image.
••
Blur More - Softens the edges more than the Blur filter does.