Threshold - Plustek SmartOffice PS286 Plus User Manual

26 TWAIN Help
2.2.2.9

Threshold

This setting is available only when Black & White is selected as
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.
The following options are available from the drop-down list:
· Basic
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 the arrow signs on the right and left ends.
The current value is shown to right of the scroll bar.
· Advanced
You may adjust the 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.
Scan Mode.
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