FontCMaps::from_doc can spend 4.5+ seconds decompressing and parsing
large embedded TrueType fonts for CID fonts with sparse ToUnicode
CMaps. For extract_text_in_regions (hybrid OCR pipeline), this is
unnecessary — fonts that can't be decoded cheaply will produce
empty/garbage text, triggering needs_ocr=true and GPU OCR fallback.
Changes:
- Add FontCMaps::from_doc_pages_fast() that skips TrueType font
fallback parsing (build_fallback_cmap_for_type0) and Identity-H/V
second pass entirely
- Add FontCMaps::from_doc_pages() for filtered page sets
- extract_text_in_regions_mem uses fast mode
- Restructure fallback chain: try cheap fallbacks first, only attempt
expensive TrueType parsing when needed and not in fast mode
Benchmark on nihms-1771367.pdf (19-page chemistry paper):
- FontCMaps fast: 201µs
- FontCMaps slow: 4.47s
- 22,000x speedup on font parsing
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Both bindings now expose the same 6 function families: process, detect,
classify, extractText, extractTextWithPositions, and extractTextInRegions.
Bumps PyO3 from 0.22 to 0.25 for Python 3.14 support.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Points to firecrawl/lopdf@edf6279 which fixes decompressed_content()
for streams without a /Filter entry. Our xobjects.rs workaround remains
as a defensive fallback.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* feat: tagged PDF structure tree support for semantic markdown generation
Parse /StructTreeRoot from tagged PDFs and use semantic roles (H1-H6, P,
LI, BlockQuote, Code, Caption) to improve markdown output. Structure tree
headings add to font-size heuristics without suppressing them. Coverage
threshold (≥50%) ensures only properly tagged PDFs activate this path.
Phase 1: Parse structure tree with role maps, MCID collection, flattening
Phase 2: Capture MCIDs from BMC/BDC operators, tag TextItems
Phase 3: Structure-aware markdown generation in convert loop
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: accumulate consecutive code lines into single fenced block
Per-line code fencing produced broken markdown for multi-line code
blocks (separate ``` open/close per line). Unify struct-tree Code
role and font-based monospace detection into a single is_code_line
check with in_code_block state for proper accumulation.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* test: add tagged PDF fixture with Firecrawl docs content
Synthetic 7-page PDF with rich structure tree exercising H1, H2, H3,
P, Code, LI, Caption, TH, TD roles. Generated via fpdf2 script.
Integration test verifies struct tree parsing and code fence output.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* chore: remove python PDF generator script from repo
Keep the generated fixture PDF but don't track the generator script.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: handle malformed bare-name struct types in tagged PDFs
Some PDF generators (e.g. fpdf2) write /S Code instead of /S /Code
in structure elements. lopdf silently drops these objects since bare
tokens are invalid PDF syntax. Add a pre-processor that scans for
known bare struct type names and prepends / before loading.
Unifies path and memory loading through the same fix pipeline.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* chore: update lopdf dependency to main branch
The firecrawl/zlib-checksum-encrypted branch was merged and deleted.
Point to main which includes all previously merged fixes.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* chore: switch lopdf to upstream repo pinned at 845cd3d
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Expose the pdf-inspector Rust library as a Python package using PyO3 + maturin.
Python users can now `pip install` and use `import pdf_inspector` for PDF
classification, text extraction, and markdown conversion with native Rust speed.
Adds:
- src/python.rs: PyO3 bindings (process_pdf, detect_pdf, extract_text, etc.)
- pyproject.toml: maturin build configuration
- pdf_inspector.pyi: type stubs for IDE support
- tests/test_python.py: 21 pytest tests covering all Python API functions
- examples/basic_usage.py: example script demonstrating all features
- Updated README with Python quick start and API reference
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Arabic PDFs using ToUnicode maps to presentation forms (U+FB50-FDFF,
U+FE70-FEFE) produced unreadable output. Apply NFKC normalization to
convert back to base Arabic (U+0600-06FF), then reverse character order
within items that had presentation forms (visual→logical order).
Improves Arabic PDF word overlap with Mistral from ~4.5% to ~78.6%.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Points to firecrawl/lopdf branch that falls back to raw deflate when
zlib adler32 checksum is corrupted after RC4 decryption. Fixes 5
encrypted BrokerCheck PDFs that were misclassified as scanned.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The firecrawl/fix-cmap-optional-slash branch caused a regression on
the Italian PDF (garbled CMap-encoded text). The EPEVER fix was a
wrong diagnosis — the PDF extracts correctly on upstream main.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Switches to a new lopdf branch that includes the CMap parser fix for
PDFs with uncompressed ToUnicode streams that omit the leading slash
on metadata keys (CIDSystemInfo, CMapName, CMapType).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Extract axis-aligned rectangles from W/W* clip operators in content
streams — many PDFs define table cells as clipping paths instead of
stroked rects. Add merged-cluster fallback in detect_tables_from_rects()
that merges all cluster rects when per-cluster detection fails or only
produces narrow false-positives (≤3 columns). Uses rect Y-edges for
rows and text X-clustering for columns.
Also updates lopdf to firecrawl fork (fix-leading-whitespace branch).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The R6 encryption fix has been merged upstream, so switch from the
fork back to the canonical repository.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Use abimaelmartell/lopdf firecrawl/fix-r6-encryption branch which
accepts /O and /U values longer than 48 bytes in V5/R6 encrypted PDFs.
This unblocks 4 encrypted PDFs in the bench suite that were previously
rejected with InvalidHashLength.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Merge CMap and Differences encoding at the byte level for single-byte
fonts, fixing garbled output when partial ToUnicode CMaps caused Latin-1
fallback to block the Differences path. Add Adobe-Korea1 CID-to-Unicode
predefined mapping for Identity-H CID fonts without ToUnicode streams,
and support TrueType cmap extraction via ttf-parser for embedded fonts.
Also handle suffixed glyph names (e.g. zero.tf, a.ss01) per Adobe spec.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Eliminates double-parsing of PDFs by using the lopdf document model exclusively
for ToUnicode CMap extraction. The old raw byte scanner parsed PDFs separately
from lopdf and only handled FlateDecode, while lopdf handles FlateDecode + LZW +
ASCII85. The new approach walks page fonts and Form XObject fonts via the document
API, yielding ~7x speedup on text-heavy PDFs and ~1.2x overall.
- Add FontCMaps::from_doc() with recursive Form XObject font walking
- Remove ~270 lines of raw byte scanning code (from_pdf_bytes, extract_stream_from_raw_pdf, etc.)
- Remove flate2 dependency (lopdf handles decompression internally)
- Remove dead CMap lookup fallback branches (by_name, get_with_obj, base_font_name)
- Remove unused font_base_names parameter from extract_text_from_operand
- Skip U+FFFD replacement characters in CMap decode (PDF notdef glyph markers)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add --pages flag to insert <!-- Page N --> markers between pages
- Add --select-pages flag to process only specific pages (e.g. 1,3,5-10)
- Wire MarkdownOptions and page filter through process_pdf_with_config
- Fix fuzzy CMap matching that caused Cyrillic substitution on Latin text
- Fix whitespace Tj items not advancing text matrix (broke gap detection)
- Tighten single-char fragment join threshold from 0.25 to 0.20
- Gitignore debug/diagnostic binaries and remove tracked ones
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Image-only pages (e.g. scanned cover pages) were appended at the end of
output instead of appearing in page order. Now flushes tables/images for
intermediate pages with no text lines during page transitions.
Also collapses dot-leader runs (4+ dots) into " ... " for cleaner TOC
rendering, and adds debug_pages binary for inspecting per-page items.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add pairwise cross-row column alignment check to find_table_regions_strict().
Real tables have fixed column X positions that repeat across rows (score ~1.0),
while paragraph text has varying word positions (score ~0.3-0.4). Regions with
average pairwise alignment score < 0.5 are now rejected.
Also remove the num_cols >= 5 content-check bypass for BodyFont mode, requiring
body-font tables to always have ≥30% data-like cell content.
Fixes false table detection across 9+ PDFs including AI_Cultural_Collections
(-730 false lines), 131212888 (-740), Data-Processing-Agreement (-108),
CEP_DN_Interest_Rates (-93). No regressions on legitimate tables.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Smart PDF type detection (text vs scanned) without full document load
- Text extraction using lopdf directly
- Markdown conversion with header/list/code detection
- CLI tools: detect-pdf, pdf2md
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
