Plustek Opticpro A320E Flatbed Scanner - Manual (Page 53)

TWAIN Help 18
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Consortium) profile.
This feature is available only when Color is selected as
Scan Mode .
2.2.2.2 Color Dropout
Color Dropout allows you to remove a color channel (Red, Green or Blue) while
scanning.
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.
This feature is available only when Black & White or
Grayscale is selected as Scan Mode .
2.2.2.3 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 .