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How to obtain good recognition results
When an image has been analyzed in Readiris and its recognition accuracy is not sufficient, a warning sign
is displayed both in the Page thumbnail and below the top toolbar.
There might be various causes for unsatisfactory recognition results, since the recognition depends on a
number of factors. In this topic we list the factors that influence the recognition.
The document language
Make sure you select the right language in the Language list. See the section Selecting the
Document Language for more information.
The quality of the scanned documents
If the scanned documents are too bright, or too dark, Readiris will have trouble recognizing
them. Luckily there is a feature that allows you to adjust the quality of scanned documents.
See the section Adjusting the Image Quality to learn how to do so.
If digital camera images are out of focus, or were made in bad lighting conditions (lack of
brightness, reflections, weak contrast, etc.), Readiris will also have trouble recognizing them.
See the sections Opening Digital Camera Images and Optimizing the Scanned
Documents > Deskewing Digital Camera Images to learn how to process digital camera
images correctly.
The scanner settings
If you are using a scanner to scan documents, the image quality is also linked to the scanner
settings:
Make sure the scan resolution is set to 300 dpi for regular documents and to 400 dpi for
small print and Asian languages.
Make sure documents are scanned so the text is in correct orientation. If necessary, rotate
their images in Readiris.
Make sure the documents are not skewed.
See the section Scanning Documents, Preprocessing Options and Page Analysis Options to
make sure the right settings have been selected for your scanner.
Please note that an image of very poor quality won't be correctly recognized even after verification of the
above points.
How to process digital camera images
See Opening Digital Camera Images and Deskewing Digital Camera Images.
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