User Manual

Button Configuration Window Overview 39
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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.
You may adjust the
Threshold value
either way:
·
Slide the thumb of
the scroll bar to the right or left
to decrease or increase
the Threshold value
.
·
Click on the scroll bar.
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.
Page Rotation Setting
Clicking
opens the
Page Rotation Setting
page.
·
0°
-- Clicking this button keeps the image at its original orientation.
·
90
º Right
-- Clicking this button
turns the image clockwise by 90º.