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Improving Performance
Document Quality
Scanning Angle
If you scan typeset, high-quality printed pages, text recognition
accuracy should be very high.
With lesser-quality pages, however, text recognition may not be as
accurate. This section discusses a number of factors that affect scanning
and recognition performance:
• Document Quality
• Scanning Angle
• Scanner Glass Cleanliness
• Paper Transparency
• HP AccuPage
OmniForm recognizes characters in almost any font from 6 to 72 points
in size. However, keep the following in mind when using OmniForm:
• The print should be reasonably clean and crisp. Characters must
be distinct: separated from each other and not blurry or
overlapping.
• The document should be free of notes, lines, or doodles.
Anything that is not a printed character slows recognition, and
any character distorted by a mark will be unrecognizable.
• The document font should be non-stylized; for example,
OmniForm may not recognize the Zapf Chancery font accurately.
• Forms with underlined text should have the lines placed below
the text and not touching it for best results. It is difficult to
recognize underlined text because the underline overprints the
descenders on the letters g, j, p, q, and y, changing their shape.
Make sure that each document is positioned correctly in your scanner
and is not crooked. Even if you use the Auto Form Straightening option,
it is possible for the page to be too skewed for OmniForm to design it
properly. Adjust the page and rescan it if you see numerous recognition
errors due to skewing.
Improving Performance
Technical Information 10-7
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