Zero height box found, cannot convert properly

[theesfeld]

Every single PDF I have tried gets the following error:

Zero height box found, cannot convert properly

Traceback (most recent call last):
  File "/Users/grim/src/marker/convert_single.py", line 22, in <module>
    full_text, out_meta = convert_single_pdf(fname, model_lst, max_pages=args.max_pages, parallel_factor=args.parallel_factor)
  File "/Users/grim/src/marker/marker/convert.py", line 108, in convert_single_pdf
    block_types = detect_document_block_types(
  File "/Users/grim/src/marker/marker/segmentation.py", line 51, in detect_document_block_types
    encodings, metadata, sample_lengths = get_features(doc, blocks)
  File "/Users/grim/src/marker/marker/segmentation.py", line 160, in get_features
    encoding, other_data = get_page_encoding(doc[i], blocks[i])
  File "/Users/grim/src/marker/marker/segmentation.py", line 104, in get_page_encoding
    raise ValueError
ValueError

macOS 14.2
python 3.9

installed via exact instructions from git repo

[VikParuchuri]

That's strange, that will only happen when detected bboxes are 0 or less height (something weird with the pdf). Can you share the pdfs you're trying?

[drewocarr]

@VikParuchuri
Happening with select pdfs for me as well
design-for-the-real-world-victor-papanek.pdf

[VikParuchuri]

Thanks for the example, will take a look tomorrow.

[theesfeld]

That's strange, that will only happen when detected bboxes are 0 or less height (something weird with the pdf). Can you share the pdfs you're trying?

Unfortunately I cannot as they are sensitive - I am getting the same issue with the pdf that @Blacktothefuture posted though

[VikParuchuri]

TIL that pdfs can be rotated, and the coordinates of the bboxes for the text will not be rotated accordingly.

Basically, this bug is due to trying to convert pdfs that have had pages rotated. I'm looking into a fix.

[theesfeld]

good find!!

[VikParuchuri]

@theesfeld @Blacktothefuture I've pushed a fix to the dev branch. It works with the pdf example above. This needs more testing with a range of pdfs to make sure it works properly (and doesn't cause issues with other pdfs) before I merge it.

[theesfeld]

can I privately send you a pdf I am having issues with?

[VikParuchuri]

Sure, you can email [email protected] or join the about-to-launch discord and DM me (https://discord.gg//KuZwXNGnfH)

[VikParuchuri]

If anyone has bandwidth to test the fix currently on the dev branch here, I'd appreciate it!

[VikParuchuri]

I've merged the PR, so am closing this. Please re-open if you notice any issues.

[balabis]

Hey @VikParuchuri
Wanted to report on the rotation issue - I'm running marker on Google Colab with !marker_single /content/test3.pdf /content--batch_multiplier 4 and if test3.pdf is rotated 90 degrees I get nonsensical markdown. When i rotate the document back with Preview on my mac and upload the file again to Google Colab, the markdown returned is perfect.