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ragflow/internal/deepdoc
zcxGGmu a7b193d77b fix: align pdf table structure coordinates (#17016)
### What problem does this PR solve?

Table structure recognition rows, columns, headers, and spans are
produced in cropped table image coordinates, while OCR boxes are matched
later in page-cumulative coordinates. Comparing those boxes without
normalization can skip or misassign table row and column metadata.

Closes #16992.

### What is changed?

- Map TSR components from cropped or rotated table-image coordinates
back into page-cumulative coordinates before matching OCR boxes.
- Reuse one inverse rotation transform for rotated OCR boxes and TSR
components.
- Keep TSR layout ids in the same `table-N` form used by table OCR
boxes.
- Sort columns by mapped page x-coordinate after coordinate
normalization.
- Add focused unit coverage for page offsets, zoom scaling, and
90/180/270 degree rotated tables.

### Type of change

- [x] Bug fix
- [x] Test coverage

### How has this been tested?

- `uv run --group test pytest
test/unit_test/deepdoc/parser/test_pdf_parser_table_coordinates.py -q`
- `uv run --no-sync --group test pytest
--confcutdir=test/unit_test/deepdoc/parser
test/unit_test/deepdoc/parser/test_pdf_parser_table_coordinates.py -q`
- `uv run ruff check deepdoc/parser/pdf_parser.py
test/unit_test/deepdoc/parser/test_pdf_parser_table_coordinates.py`
- `uv run --no-sync python -m py_compile deepdoc/parser/pdf_parser.py
test/unit_test/deepdoc/parser/test_pdf_parser_table_coordinates.py`
- `git diff --check`

A later dependency-sync attempt was blocked while resolving the
`en-core-web-sm` wheel from GitHub, and the repository-level unit-test
conftest can try to download missing NLTK `wordnet` data when it is not
already present locally. The focused parser test above does not require
that data fixture.

---------

Co-authored-by: zq <zhouquan1511@163.com>
2026-07-18 18:22:33 +08:00
..
2026-07-10 11:58:32 +08:00