diff --git a/docs/advanced.rst b/docs/advanced.rst index e86cfd3c..db6402f7 100644 --- a/docs/advanced.rst +++ b/docs/advanced.rst @@ -43,7 +43,7 @@ OCRmyPDF checks the environment variable ``OCRMYPDF_TESSERACT`` for the full pat A Tesseract environment variable that overrides the path to Tesseract's data files. -For example, if you are testing tesseract 4.00 and don't wish to disturb use an existing tesseract 3.04 installation, you can launch OCRmyPDF as follows: +For example, if you are testing tesseract 4.00 and don't wish to use an existing tesseract 3.04 installation, you can launch OCRmyPDF as follows: .. code-block:: bash @@ -115,7 +115,7 @@ rendering Creating a new PDF from other data (such as an existing PDF). -OCRmyPDF has three PDF renderers: ``sandwich``, ``hocr``, ``tesseract``. The renderer may be selected using ``--pdf-renderer``. The default is ``auto`` which lets OCRmyPDF select the renderer to use. Currently, ``auto`` selects ``sandwich`` for Tesseract 3.05.01, and newer, ``hocr`` for older versions of Tesseract. +OCRmyPDF has three PDF renderers: ``sandwich``, ``hocr``, ``tesseract``. The renderer may be selected using ``--pdf-renderer``. The default is ``auto`` which lets OCRmyPDF select the renderer to use. Currently, ``auto`` selects ``sandwich`` for Tesseract 3.05.01 or newer, or ``hocr`` for older versions of Tesseract. The ``sandwich`` renderer """"""""""""""""""""""""" @@ -136,7 +136,7 @@ This works in all versions of Tesseract. The ``tesseract`` renderer """""""""""""""""""""""""" -The ``tesseract`` renderer creates a PDF with the image and text layers precomposed, meaning that it always transcodes, loses image quality and rasterizes and vector objects. It does a better job on non-Latin text and document structure than ``hocr``. +The ``tesseract`` renderer creates a PDF with the image and text layers precomposed, meaning that it always transcodes, loses image quality and rasterizes any vector objects. It does a better job on non-Latin text and document structure than ``hocr``. If a PDF created with this renderer using Tesseract versions older than 3.05.00 is then passed through Ghostscript's pdfwrite feature, the OCR text *may* be corrupted. The ``--output-type=pdfa`` argument will produce a warning in this situation.