OCR controls the options for recognizing text of the scanned PDF document. This function makes the scanned text
searchable and selectable. Details can be found in Document->OCR Pages...
1. Recognition. Specifies general options for document recognition.
1. Language. Sets the language that will be used for OCR recognition.
If the necessary language is not on the list, you can click the More Languages button and search for it
at the Languages download page.
2. Accuracy. Sets the resolution used for OCR recognition. Possible values are: High, Medium, Low .
The Low setting can make document processing faster, but at a possible cost of accuracy. High
accuracy should be used only in cases with small fonts (less than 10 pt), and where the scanning
resolution that was used was also high. Medium accuracy is the recommended setting for most
typical OCR of ~10 point font sizes and higher. The internal DPI settings used for OCR are: High (600
DPI), Medium (300 DPI), and Low (150 DPI). Generally speaking, it is best to try to match the
setting used here to that used in your scanning process. To illustrate, you will not gain much by selecting
Medium (300 DPI) accuracy with a low resolution 100 DPI scan, but leaving the default of Medium is a
recommended way to produce consistently good results.
3. Auto Deskew. Automatically correct tilted pages. This is only available for Output Type: "Create New
Searchable PDF", and will not re-orient pages that are upside down or sideways.
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