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Chapter 3 Processing documents 32
Wizard to access basic settings, such as whether or not to view results in the target application.
This wizard lets you do immediate conversions or call the Workflow Assistant to access all
settings, for instance to change target file names and locations. This shortcut menu item also
offers all workflows that have image file input.
Input from scanner
You must have a functioning, supported scanner correctly installed with OmniPage 18. You
have a choice of scanning modes. In making your choice, there are two main considerations:
• Which type of output do you want in your export document?
• Which mode will yield best OCR accuracy?
Scan black and white
Select this to scan in black-and-white. Black-and-white images can be scanned and
handled quicker than others and occupy less disk space.
Scan grayscale
Select this to use grayscale scanning. For best OCR accuracy, use this for pages with
varying or low contrast (not much difference between light and dark) and with text
on colored or shaded backgrounds.
Scan color
Select this to scan in color. This will function only with color scanners. Choose this
if you want colored graphics, texts or backgrounds in the output document. For
OCR accuracy, it offers no more benefit than grayscale scanning, but will require
much more time, memory resources and disk space.
Brightness and contrast
Good brightness and contrast settings play an important role in OCR accuracy. Set these in the
Scanner panel of the Options dialog box or in your scanner’s interface. After loading an
image, check its appearance. If characters are thick and touching, lighten the brightness. If
characters are thin and broken, darken it. Then rescan the page. If your scanning results are
still not satisfactory, open the scanned image in the Image Enhancement window to edit it
using a range of different tools.