fix: improve multi-column layout sorting for academic papers (#4104)#4283
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Gopesh111 wants to merge 2 commits intoUnstructured-IO:mainfrom
Open
fix: improve multi-column layout sorting for academic papers (#4104)#4283Gopesh111 wants to merge 2 commits intoUnstructured-IO:mainfrom
Gopesh111 wants to merge 2 commits intoUnstructured-IO:mainfrom
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Hi @Unstructured-IO-team, I've submitted this PR to address the multi-column sorting issue (#4104) specifically for academic layouts. I've implemented a hybrid sorting logic and tuned the XY-cut thresholds to improve robustness against scan noise. I noticed the CI workflows are awaiting approval from a maintainer. Could you please trigger the tests so I can verify everything is green on your end? Thanks! |
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This PR addresses the reading order issues in multi-column documents (specifically academic papers) as reported in #4104.
Key Changes:
Hybrid Sorting Logic: Introduced sort_page_elements_columns in sorting.py to bin elements into Top (Header/Title), Bottom (Footer), and Middle (Body) zones.
Column-Aware Binning: Body elements are now split into Left and Right columns based on page mid-point, preventing the 'Z-pattern' reading order.
Noise-Resistant XY-Cut: Updated xycut.py with increased min_gap (10px for X, 2px for Y) and min_value thresholds. This allows the parser to ignore scanning noise and correctly identify narrow gutters between columns in research papers.
Verification:
Tested with the NAACL 2025 findings paper. Verified that the sequence now correctly follows: Title -> Abstract -> Intro (Left Col) -> Intro (Right Col) -> Footer.