The inter-word Tz calculation stretched "word " to span from the current
word to the next, producing extreme horizontal scaling (300-500%) for
words far apart (e.g. in tables). Use per-word Tz instead — Td
positioning already handles inter-word gaps correctly.
Fixes#1635
Catch OSError (parent of both FileNotFoundError and
NotADirectoryError) in verapdf.available() so environments where
executing `verapdf` raises NotADirectoryError gracefully fall back
instead of crashing the pipeline. Fixes#1638.
Fixes#1642. Adds an early check in check_requested_output_file() that
raises OutputFileAccessError (exit code 5) if the destination file
already exists and --no-overwrite is set. The option is wired through
CLI, OcrOptions, and the Python API.
The jpg_quality and png_quality options default to None in the pydantic
model, but the fallback check only handled == 0. This caused a TypeError
when calling ocrmypdf.ocr() with optimize >= 2 without explicitly
setting quality values. Fixes#1641.
Replace hatch-vcs dynamic versioning with static version in _version.py
and pyproject.toml. Split CI into build.yml (test + stage draft release
on main) and release.yml (publish from draft on tag push). Docker images
are built on main pushes and re-tagged with the release version on tag
push without rebuilding.
The API's 'language' param was silently dropped because OcrOptions uses
'languages' (plural). Map language->languages in create_options() and
_pdf_to_hocr(), coercing bare strings to lists and splitting '+'
separated codes to match CLI behavior.
_build_text_layer_ctm() returned None when text_rotation was 0,
skipping the origin translation needed for pages with non-zero
MediaBox origins (e.g. JSTOR PDFs with [0, 100, 595, 982]). This
caused the text layer to be offset by the page origin amount.
Always compute the full CTM and only return None when the result
is the identity matrix.
Fixes#1630
OcrOptions.tesseract_timeout defaulted to 0.0, which caused
subprocess.run(timeout=0) to immediately raise TimeoutExpired before
Tesseract could produce any output. The CLI was unaffected because
argparse defaults --tesseract-timeout to 180. Change the OcrOptions
default to None so the plugin's own default (180s) is used.
Fixes#1636
encode_text() maps unicode characters one-by-one to glyph IDs without
any text shaping, producing incorrect output for complex scripts:
Arabic glyphs in wrong order without joining forms, Devanagari conjuncts
broken apart. Replace with shape_text() which runs HarfBuzz for proper
BiDi reordering, Arabic shaping, and Devanagari conjunct formation.
poppler/pdftotext does not carry Tz (horizontal scaling) across
BT/ET boundaries, causing words to appear on separate lines.
Replace per-word BT blocks (via fpdf2's cell/set_stretching API)
with a single BT block per line using raw PDF operators. Each
non-last word gets a trailing space with Tz calculated to span
exactly to the next word's start position.
When Tesseract completely fails to detect text rotation (no textangle,
slope=0), it produces garbage text in tall-narrow bounding boxes. Add
an aspect ratio plausibility check that compares the OCR bounding box
shape to the expected shape of the rendered text (accounting for
baseline slope). Lines where the ratio of aspect ratios is < 0.1 are
suppressed.
Uses a fast path (width >= height) to skip the expensive font
measurement for the common case of normal horizontal text.
Tesseract doesn't output the textangle hOCR attribute for 90-degree
rotated text. Instead, the rotation is encoded as extreme baseline
slope values (e.g., 462.2). Without detecting this, the renderer used
the axis-aligned bounding box height as line_size_height, producing
font sizes of 2000+ pt instead of ~10 pt.
Detect steep baseline slopes (|slope| > 1.0, i.e., > 45° from
horizontal) and extract the effective text rotation angle via atan().
The meaningless slope/intercept values are then replaced with
font-metrics-based defaults.
The previous fix (e62e73e4) only corrected text_rendering_mode →
text_mode in the single-page Fpdf2PdfRenderer, but the main OCR
pipeline uses Fpdf2MultiPageRenderer which still had the old
attribute name. Since fpdf2 has no text_rendering_mode property,
setting it silently created a no-op attribute while text_mode stayed
at FILL — so 3 Tr (invisible text) was never emitted.
Fixes#1631, #1632
Fixes#1630 where --redo-ocr would shift OCR text vertically on PDFs
with non-zero mediabox origins (e.g., [0, 100, width, height+100]).
The bug occurred in _graft_fpdf2_text_layer where the Form XObject BBox
was set to the text layer's mediabox [0, 0, w, h] instead of the base
page's mediabox [0, 100, w, h+100]. This caused a coordinate mismatch
between the BBox and the transformation matrix, resulting in text being
positioned incorrectly.
The fix changes line 450 in _graft.py to use base_mediabox instead of
mediabox, making the fpdf2 renderer consistent with the sandwich renderer
which already used base_mediabox correctly.
This issue commonly affected:
- JSTOR PDFs (generated by iText with cropping)
- Cropped PDFs from various tools
- PDFs with non-standard coordinate systems
Added regression test that creates a PDF with offset mediabox origin
and verifies --redo-ocr preserves coordinates correctly.
- Prioritize uv over pip throughout, with uv as the recommended installer
- Update repology badges: Debian 13, Ubuntu 24.04, Fedora 40/41
- Make Python 3.12 the default (3.11 still supported)
- Promote Homebrew as full-featured option for macOS and Linux
- Add dependency summary table aligned with maintainers.md
- Document uharfbuzz and fonts-noto requirements
- Remove outdated warnings and simplify 32-bit section
Ghostscript may fail when asked to rasterize at very low DPI values
(below 10 on either axis). This adds a workaround that uses a minimum
of 10 DPI for the Ghostscript call, then resizes the output image to
match the dimensions that would have resulted from the original low
DPI request.
Fixes#1612
Make filter_pdf_page, get_ocr_engine, and optimize_pdf return
non-optional types by handling None cases explicitly: raise errors
for required results, return sensible defaults for optional ones.
Use a Pydantic field validator to convert string input to list[str]
during OcrOptions construction, simplifying the type from
`str | list[str] | None` to `list[str] | None`. Security validation
(path injection check) now happens at construction rather than in
check_options_preprocessing().
Allow users to bypass the TaggedPDFError when processing Tagged PDFs
by setting --tagged-pdf-mode=ignore. This is useful when users know
they want to OCR a Tagged PDF despite the warning.
- 'default': Error if --mode is default, otherwise warn (current behavior)
- 'ignore': Always warn but continue processing (never error)
FlateDecode+DCTDecode compressed images are essentially deflated JPEGs,
typically created by OCRmyPDF's optimizer. This change ensures pdfinfo
correctly identifies them and should_visible_page_image_use_jpg treats
them as JPEG-origin images, allowing JPEG output when appropriate.
pypdfium was not converting images to the correct colorspace/mode based
on the raster_device parameter. For example, pngmono should produce a
1-bit image, but pypdfium was outputting full-color or grayscale images.
This caused images to be incorrectly promoted to PNG instead of being
preserved as CCITT/JBIG2 when using --force-ocr with pypdfium, because
the optimizer relies on the image being in the correct mode.
Changes:
- Render in grayscale for pngmono device (better input for 1-bit conversion)
- Add mode conversion to match Ghostscript's native device output:
- pngmono: convert to mode '1' (1-bit)
- pnggray/jpeggray: convert to mode 'L' (8-bit grayscale)
- png256: convert to mode 'P' (8-bit indexed)
- png16m/jpeg: convert to mode 'RGB'
Add new options: --mode, --ocr-engine, --rasterizer,
--continue-on-soft-render-error, --tesseract-non-ocr-timeout,
--tesseract-downsample-large-images, --tesseract-downsample-above,
--unpaper-args (fish), --plugin (fish).
Update --output-type to include 'auto' as default.
Update --pdf-renderer to include 'fpdf2' and mark hocr as deprecated.
Remove non-working options: --remove-background, --threshold.
The test expected MediaBox preservation for pdfa output, but this only
works when verapdf is available for speculative PDF/A conversion.
Without verapdf (Linux/Windows CI), Ghostscript normalizes the MediaBox.
Also convert pikepdf.Array to list in assertions for clearer error
messages, avoiding pytest repr issues with pikepdf objects.
James R. Barlow
dependabot[bot]andGitHub