ScanSoft OMNIPAGE DIRECT, Руководство по установке

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Improving Accuracy
How to Improve Performance 35
The Brightness Setting
The Brightness setting is your most powerful means to improve text-
recognition accuracy. It is available in the Scan Text dialog box if you de-
select
Auto or Normal Intensity in the Options dialog box.
Manually adjusting the Brightness control allows for differences in paper
and print quality for all kinds of pages: newsprint, glossy paper, thickly
inked, etc. The following image shows a lower-case e printed on glossy
paper as it might appear to Direct. Notice the thin, horizontal line in the
middle. Is this character an e or a c? It may be hard for Direct to tell.
The following image shows the same character, as it appears to Direct,
when the brightness control is set to
Darken.
Direct will always read this character as an e.
To adjust the Brightness control, either click on the left or right arrows or
move the mouse pointer to the box, hold the mouse button down, and
slide the control left or right. The number in the control's box is a reference
you can use when you scan other documents. If you find that a particular
brightness setting is effective with a certain quality of document, use that
setting the next time you scan that type of page.
Auto Intensity
Select this to let Direct automatically set the optimal brightness with
grayscale scanners. This feature is especially useful if your page is dirty, if
text is printed on a colored background, or if the page has shading from a
copy machine.
If you have a TWAIN-compliant scanner and a TWAIN data source dialog
box appears when you use Direct, you must make sure that the settings in
the TWAIN dialog box match those in the Direct Options dialog box.