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TextBridge Professional Edition User's Guide
Low-resolution fax images can
be difficult to recognize
Figure 6–5. Fax image
To recognize fax images, TextBridge Pro provides a Fax setting
on the Preferences Panel and in the Recognize menu. This
document quality filter initiates a pre-processing step that
enhances the fax image before OCR begins.
The Fax switch works on fax images stored in image files and on
scanned hard copy faxes. TextBridge Pro automatically uses the
fax filter when the image is less than 225 dpi.
Note
Do not use the Fax filter on non-fax documents, either scanned or
on-line. If you do, OCR accuracy can degrade. Also, if you notice
that recognition is poor on synthesized fax images (for example, a
word processor document “printed” to a fax modem), turn off the
Fax filter, and train OCR on at least part of the document.
Process multiple documents separately
TextBridge Pro uses a variety of artificial intelligence techniques
to recognize text. With these techniques, TextBridge Pro actually
teaches itself about what it is recognizing.
Thus, TextBridge Pro can improve OCR accuracy and speed as it
scans and recognizes subsequent pages of a document.
