ScanSoft OMNIPAGE DIRECT 2 FOR WINDOWS Installation Manual page 38

Improving Accuracy
For example, if you select Auto Intensity in the Direct Options dialog box,
you must have Grayscale selected in the TWAIN dialog. The Size: area
setting in the Direct Options dialog must be as large or larger than the
scanning area setting in the TWAIN dialog. And, the resolution setting in
the TWAIN dialog must be 300dpi.
For more information about using TWAIN-compliant scanners, see
"TWAIN Scanners Not Listed" on page 41
The Character Window
The Character Window appears while Direct performs text recognition on
a page; it displays small portions of the scanned image. If text characters
appear thick and run-together, adjust the Brightness setting towards
Lighten. If characters appear thin and broken, adjust the setting towards
Darken. If characters appear at an angle, rescan the document after
straightening the page in the scanner.
The Character
Window
If the Character Window does not appear during recognition, maximize
the size of your application's window and the Direct image window.
36 How to Improve Performance