In the Scanner tab of the Options dialog box, move the Brightness slider to the Lighten end if your page is colored or shaded, or to the Darken end if your page contains light text. Move the Contrast slider to the High end if your page contains light text on a colored or shaded background.
In the Process tab of the Options dialog box, select Automatically proofread results after OCR to check for possible errors when OCR is complete.
In the Process tab of the Options dialog box, select Automatically straighten page image to have OmniPage Pro check if a page image is straight and straighten it up to 10 degrees (if necessary) to improve OCR accuracy.
In the OCR tab of the Options dialog box, move the OCR Method slider to the Most Accurate end of the scale if you want to increase OCR accuracy, but are not concerned about processing speed.