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docs: clarify that --pages and --skip-text exclusions apply to image processing and OCR

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Closes #950
This commit is contained in:
James R. Barlow
2022-05-16 13:20:47 -07:00
parent b699e158be
commit 845cb5c40c
2 changed files with 13 additions and 12 deletions
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docs/advanced.rst
+5 -5
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@@ -67,11 +67,11 @@ without modifying the PDF. This is to ensure that PDFs that were
previously OCRed or were "born digital" rather than scanned are not
processed.
If ``--skip-text`` is issued, then no OCR will be performed on pages
that already have text. The page will be copied to the output. This may
be useful for documents that contain both "born digital" and scanned
content, or to use OCRmyPDF to normalize and convert to PDF/A regardless
of their contents.
If ``--skip-text`` is issued, then no image processing or OCR will be
performed on pages that already have text. The page will be copied to
the output. This may be useful for documents that contain both "born
digital" and scanned content, or to use OCRmyPDF to normalize and
convert to PDF/A regardless of their contents.
If ``--redo-ocr`` is issued, then a detailed text analysis is performed.
Text is categorized as either visible or invisible. Invisible text (OCR)
docs/cookbook.rst
+8 -7
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@@ -243,10 +243,11 @@ You can also optimize all images without performing any OCR:
ocrmypdf --tesseract-timeout=0 --optimize 3 --skip-text input.pdf output.pdf
Perform OCR only certain pages
------------------------------
Process only certain pages
--------------------------
You can ask OCRmyPDF to only apply OCR to certain pages.
You can ask OCRmyPDF to only apply `image processing <#image-processing>`__
and OCR to certain pages.
.. code-block:: bash
@@ -260,10 +261,10 @@ overlap pages. OCRmyPDF does not currently account for document page numbers,
such as an introduction section of a book that uses Roman numerals. It simply
counts the number of virtual pieces of paper since the start.
Regardless of the argument to ``--pages``, OCRmyPDF will optimize all pages in
the file and convert it to PDF/A, unless you disable those options. In this
example, we want to OCR only the title and otherwise change the PDF as little
as possible:
Regardless of the argument to ``--pages``, OCRmyPDF will optimize all pages/images
in the file and convert it to PDF/A, unless you disable those options. Both of these
steps are "whole file" operations. In this example, we want to OCR only the title
and otherwise change the PDF as little as possible:
.. code-block:: bash