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Warning

Doesn't work as described here, still missing instructions to place the PDF/A instructions and ICC profile files: https://ghostscript.readthedocs.io/en/latest/VectorDevices.html#creating-a-pdf-a-document

  1. Navigate to the staging directory containing the Production Master (_pm) image files

  2. Create temporary subdirectories 'pdf' and 'pdf/pages', and navigate back to the staging directory:

    Code Block
    languagebash
    mkdir pdf
cd pdf
mkdir pages
cd ..

    Run tesseract OCR on all images in the staging directory: 

    Code Block
    languagebash
    for i in *.tif; do tesseract -c tessedit_page_number=0 -l eng $i pdf/pages/${i%_pm.tif} pdf; done

  3. Merge page-level PDF documents into one PDF per volume/issue:

    Code Block
    languagebash
    mutool merge -o pdf/combined-pdf.pdf pdf/pages/*.pdf

  4. Produce the final PDF document.

    Code Block
    languagebash
    gs -sDEVICE=pdfwrite \
    -dPDFA=2 \
    -dPDFACompatibilityPolicy=1 \
    -dNOSAFER \
    -dFastWebView \
    -sColorConversionStrategy=RGB \
    -dDownsampleColorImages=true \
    -dColorImageDownsampleThreshold=1.0 \
    -dAutoRotatePages=/None \
    -dColorImageResolution=150 -o downsampled-pdf.pdf /mnt/dps/staff_workspaces/mirko/pdfa/PDFA_def_UTL.ps combined-pdf.pdf

  5. Delete the pdf subfolder and combined-pdf.pdf

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