User Manual

DocAction Help44
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This feature is not available when
Black & White
is selected as Scan Mode
.
Threshold
Threshold sets the color level for converting an image to line art, which can
adjust the quality of line art image or eliminate unwanted dots in the documents
to improve OCR accuracy. This setting is available only when
Black & White
is
selected as Scan Mode.
Select the options from the drop-down list. Click
to
open a dialog box where you may adjust the settings.
You may adjust the
Threshold
/ Radius / Weight
value
either way:
·
Slide the thumb of
the scroll bar to the right or left
to decrease or increase
the value
.
·
Click the arrow signs on the right and left ends.
The current value is shown to right of the scroll bar.
Color Dropout
Color Dropout allows you to remove a color channel (Red, Green or Blue) while
scanning. This feature is available only when
Black & White
or
Grayscale
is
selected as Scan Mode.
For example, if your original document contains blue texts or a blue stamp (e.g.,
a bill or invoice) and you want to discard it from your image, you may select
Blue Channel
from the drop-down list box
Descreen
Descreen applies filtering to images that contain moiré patterns (or
herringbone). A moiré pattern is created from scanning pictures in magazines,
or printed material that use color dithering. The descreen filter is not needed
when scanning original photographs or black and white images and text, but is
recommended when scanning any printed color graphics, such as a page from
a magazine, in order to remove the unsightly interference patterns which may
occur
.
This feature is not available when
Black & White
is selected as Scan Mode.
Filter
Filters help you improve your scans by allowing you to sharpen images as well
as remove excessive dots and distortion.
The following options are available from the drop-down list:
·
None
-- Applies no filter in the scanned image.
·
Average
--
Determines the medium depth of an image and averages adjacent