A-61671 / TWAIN February 2013 25
Streak Filter — allows you to configure the scanner to filter vertical
streaks from your images. Streaks are lines which may appear on an
image and are not part of the original document. Streaks may be
caused by contaminants on your documents (e.g., dirt, dust or frayed
edges) or by not following the recommended cleaning procedures for
your scanner.
• On: turns streak filter on.
• Aggressiveness: allows you to adjust the extent at which the streaks
are filtered. The values range from -2 to 2. The default is 0.
NOTE: The selection in the Document type field on the General tab has
an effect on Streak Filter. The scanner uses this field to
determine how the data under the streak is rebuilt when
removing a streak from an image. It is suggested that Text or
Text with Graphics be selected if scanning documents with
only text or low resolution graphics as it will produce the best
image processing.
Color Dropout — used to eliminate a form's background so that only
the entered data is included in the electronic image (i.e., remove the
form’s lines and boxes). For black and white images, these settings
effect the grayscale version of the document which the scanner
analyzes to produce that electronic image.
• Color: select the desired dropout color.
- (none)
- Multiple: drops colors other than dark shades (e.g., black or dark
blue ink). This feature does a color analysis of every image
scanned and drops out up to 5 different colors. The individual
colors could be any of more than 16 million colors. Use the
Aggressiveness slider to adjust the color. This feature looks at
every page that is scanned. You do not need to pick which
color(s) to drop. Multiple is available for grayscale output.
- Predominate: drops the predominant color. Use this option even
if your forms are all the same color, as it drops a wider range of
single colors. This option is also a good choice if you have
several forms that each have one form color as you can mix the
forms in a single batch.
-Red
-Green
-Blue
• Aggressiveness: allows you to adjust the extent at which colors are
dropped. The values range from -10 to 10. The default is 0. This
option is only available when Color is set to Multiple or
Predominant.
NOTES:
• All Color Dropout options are available when the Scan as selection is
Black and White.
• Red, Green and Blue are available for grayscale scanning.
• Color dropout is not available for color scanning.
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