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ABBYY® FineReader PDF User’s Guide
· Each pattern may contain up to 1,000 new characters. However, avoid creating too many
ligatures, as this may adversely affect OCR quality.
Selecting a user pattern
ABBYY FineReader lets you use patterns to improve OCR quality.
1. Click Tools > Pattern Editor....
2. In the Pattern Editor dialog box, select one of the patterns in the list and click the Set
Active button.
Some important points to remember:
1. Sometimes the program will not differentiate between very similar yet different characters
and recognize them as one and the same character. For example, the straight ('), left (‘), and
right (’) quotes will be stored in a pattern as a single character (straight quote). This means
that left and right quotes will never be used in the recognized text, even if you try to train
them.
2. For some character images, ABBYY FineReader PDF will select the corresponding keyboard
character based on the surrounding context. For example, an image of a small circle will be
recognized as the letter O if there are letters immediately next to it, and as the number 0 if
there are digits next to it.
3. A pattern can only be used for documents that have the same font, font size, and resolution
as the document used to create the pattern.
4. You can save your pattern to a file and use it in other OCR projects. See also: OCR
proj ects .
5. To recognize texts set in a different font, be sure to disable the user pattern. To do this, click
Tools > Options... to open the Options dialog box, click the OCR tab, and select the Use
built-in patterns option.
Editing a user pattern
You may wish to edit your newly created pattern before launching the OCR process. An incorrectly
trained pattern may adversely affect OCR quality. A pattern should contain only entire characters
or ligatures . Characters with cut edges and characters with incorrect letter pairings should be
removed from the pattern.
1. Click Tools > Pattern Editor....
2. In the Pattern Editor dialog box, select the pattern you want to edit and click the Edit...
button.
3. In the User Pattern dialog box, select a character and click the Properties... button.
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