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3 commits

Author SHA1 Message Date
jedarden
e6bf3dd290 feat(pdftract-3s2i): implement Phase 5.5.2 validation filter
Implement per-word validation filter for assisted-OCR BrokenVector path.

Changes:
- Add SpanSource::OcrAssisted variant to hybrid.rs
- Add Span::ocr_assisted() helper method
- Implement validate_ocr_with_position_hints() in ocr.rs
  - 5pt distance threshold for position validation
  - 0.4 confidence cap for rejected words
  - Linear scan for nearest-neighbor lookup
- Add unit tests for validation filter

Closes: pdftract-3s2i

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-24 04:57:17 -04:00
jedarden
8037e67e82 feat(pdftract-3nwz): add borderless table detection benchmark
- Add borderless detection benchmark to table_detection.rs
- Verify < 10 ms performance requirement (achieved 1.56 ms for 5040 positions)
- Confirm all unit tests pass for borderless detection
- Borderless detection implementation already existed in detector.rs

Acceptance criteria:
- PASS: 3x3 borderless table detected via alignment heuristic
- PASS: paragraph rejected; one-row pseudo-table rejected
- PASS: vertical-gap test; 3-row 3-column borderless table accepted
- PASS: Public API TableDetector::detect_borderless() exists
- PASS: Performance < 10 ms on 5000-span page (measured 1.56 ms)

Co-Authored-By: Claude Code <noreply@anthropic.com>
2026-05-23 22:30:06 -04:00
jedarden
4409eff058 feat(pdftract-88sk): fix 5x3 table test and add benchmark
Fix the critical 5x3 bordered table test to match acceptance criteria
(5 rows × 3 columns = row_ys.len() == 6, col_xs.len() == 4).

Add missing unit tests:
- test_detect_nested_rectangles: tests handling of nested rectangles
- test_detect_disjoint_tables: tests detection of multiple disjoint tables

Add Criterion benchmark for table detection performance.
Results: ~772 µs for 1000 segments (well under 5 ms requirement).

All 35 table module tests pass.

Acceptance criteria:
-  Detector emits GridCandidate for every closed grid of >= 4 cells
-  Critical test: 5x3 bordered table with row_ys.len()==6, col_xs.len()==4
-  Unit tests: single rectangle, nested rectangles, mixed text+rules, glyph-path noise
-  Public TableDetector::detect_line_based(&PageContext) -> Vec<GridCandidate>
-  Benchmark: < 5 ms on 1000-segment page

Refs: pdftract-88sk, plan section 7.2 line 2571

Co-Authored-By: Claude Code <noreply@anthropic.com>
2026-05-23 21:40:57 -04:00