Use the Output Options to determine the format and quality of output from the OCR process:
Select the Ignore form fields on page box to omit form fields from the process of optical character recognition. Select the Ignore comments on page box to omit comments from the process of optical character recognition. Select the Ignore existing text on page box to omit existing text from the process of optical character recognition. Select the Detect incorrect page rotation box to enable the automatic detection of incorrect page rotation in documents. Select the Detect skew of page content box to enable automatic detection of skewed pages, which happens when documents are scanned crookedly. Click Add/Update Languages to add/update the language packs used for OCR. This is because the software will search to a greater depth and may attempt to recognize imperfections as text. Additionally, it should be noted that setting the accuracy to high may result in unusual output if the document contains imperfections. Please note that increasing the accuracy also increases the time that the process takes and vice versa. 
Use the Recognition Options to determine the language and accuracy of the OCR process.
Use the Subset options to specify a subset of selected pages. Further information about how to specify custom page ranges is available here. Select Custom to specify a custom page range, then enter the desired page range in the adjacent number box. Select Current to specify only the current page. Use the Page Range settings to determine the page range for OCR: When this option is selected the OCR Pages dialog box will open: The default engine's OCR process in PDF-XChange Editor analyzes image-based documents, recognizes text and then places a duplicate, invisible text layer on top of it, which makes the source text selectable and searchable in the same manner as ordinary text. Preferences Dialog Box, OCR Category, OCR Engine Dropdown Menu You can use the OCR Preferences (available via the Preferences option in the File tab) to switch between default and enhanced OCR:įigure 2. Further information about the Enhanced OCR engine is available here. 
The Enhanced OCR engine is faster, more accurate and more dynamic than the default OCR engine, and it also contains some extra features. Note that two optical character recognition engines are available in PDF-Exchange Editor: the Default OCR engine and the Enhanced OCR engine, which is available when PDF-Exchange Editor Plus is purchased (either as a stand-alone product or as part of the PDF-XChange PRO bundle). Click OCR Pages to perform optical character recognition on documents:
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