Replace per-cell Tesseract re-runs with lookup of pre-existing full-page
words from row.words. Words are filtered by X-overlap with column bounds.
This fixes phantom rows with garbage text, missing last words, and
incomplete example text by using the more reliable full-page OCR results.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Rows in inter-line whitespace gaps have no Tesseract words assigned but
were still processed by build_cell_grid, producing garbage OCR output.
Filter these phantom rows using the word_count field set during Step 4.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Cells now appear one-by-one in the UI as they are OCR'd, with a live
progress bar, instead of waiting for the full result.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Extract build_cell_grid() as layout-agnostic foundation from
build_word_grid(). Step 5 now produces a generic cell grid (columns x
rows) and auto-detects whether vocab layout is present. Frontend
dynamically switches between vocab table (EN/DE/Example) and generic
cell table based on layout type.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The validation that rejected word-center grid when it produced more rows
than gap-based detection was causing fallback to gap-based rows (large
boxes). The word-center grid regularization works correctly after the
center-based grouping and cluster merging fixes.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Two fixes:
1. Grid validation: reject word-center grid if it produces MORE rows
than gap-based detection (more rows = lines were split = worse).
Falls back to gap-based rows in that case.
2. Words overlay: draw clean grid cells (column × row intersections)
instead of padded entry bboxes. Eliminates confusing double lines.
OCR text labels are placed inside the grid cells directly.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The y_tolerance for word-center clustering was based on median word
height (21px → 12px tolerance), which was too small. Words on the
same line can have centers 15-20px apart due to different heights.
Now uses 40% of the gap-based median row height as tolerance (e.g.
40px row → 16px tolerance), and 30% for merge threshold. This
produces correct cluster counts matching actual text lines.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
When columns change (Step 3), invalidate row_result and word_result.
When rows change (Step 4), invalidate word_result.
This ensures Step 5 always uses the latest row boundaries instead of
showing stale cached word_result from a previous run.
Applies to both auto-detection and manual override endpoints.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Fix half-height rows caused by tall special characters (brackets, IPA
symbols) being split into separate line clusters:
- Group words by vertical CENTER instead of TOP position, so tall
characters on the same line stay in one cluster
- Filter outlier-height words (>2× median) when computing letter_h
so brackets/IPA don't skew the row height
- Merge clusters closer than 0.4× median word height (definitely
same text line despite slight center differences)
- Increased y_tolerance from 0.5× to 0.6× median word height
- Enhanced logging with cluster merge count and row height range
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace rigid uniform grid with bottom-up approach that derives row
boundaries from word vertical centers:
- Group words into line clusters, compute center_y per cluster
- Compute pitch (distance between consecutive centers)
- Detect section breaks where gap > 1.8× median pitch
- Place row boundaries at midpoints between consecutive centers
- Per-section local pitch adapts to heading/paragraph spacing
- Validate ≥85% word placement, fallback to gap-based rows
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace _split_oversized_rows() with _regularize_row_grid(). When ≥60%
of content rows have consistent height (±25% of median), overlay a
uniform grid with the standard row height over the entire content area.
This leverages the fact that books/vocab lists use constant row heights.
Validates grid by checking ≥85% of words land in a grid row. Falls back
to gap-based rows if heights are too irregular or words don't fit.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Implement _split_oversized_rows() in detect_row_geometry() (Step 7) to
split content rows >1.5× median height using local horizontal projection.
This produces correctly-sized rows before word OCR runs, instead of
working around the issue in Step 5 with sub-cell splitting hacks.
Removed Step 5 workarounds: _split_oversized_entries(), sub-cell
splitting in build_word_grid(), and median_row_h calculation.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
For cells taller than 1.5× median row height, split vertically into
sub-cells and OCR each separately. This fixes RapidOCR losing text
at the bottom of tall cells (e.g. "floor/Fußboden" below "egg/Ei"
in a merged row). Generic fix — works for any oversized cell.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Adds entries for all regulation codes in REGULATIONS_IN_RAG that were
missing from RAG_PDF_MAPPING, fixing "Kein PDF-Mapping" messages.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Integrate Britfone dictionary (MIT, 15k British English IPA entries)
- Add pronunciation parameter: 'british' (default) or 'american'
- British uses Britfone (Received Pronunciation), falls back to CMU
- American uses eng_to_ipa/CMU, falls back to Britfone
- Frontend: dropdown to switch pronunciation, default = British
- API: ?pronunciation=british|american query parameter
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The Docker container cannot reach Google Fonts, causing build failures.
Switch to bundled local font file using next/font/local.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
1. Semantic example matching: instead of attaching example sentences
to the immediately preceding entry, find the vocab entry whose
English word(s) appear in the example. "a broken arm" → matches
"broken" via word overlap, not "egg/Ei". Uses stem matching for
word form variants (break/broken share stem "bro").
2. Cell padding: add 8px padding to each cell region so words at
column/row edges don't get clipped by OCR (fixes "er wollte"
missing at cell boundaries).
3. Treat very short DE text (≤2 chars) as OCR noise, not real
translation — prevents false positives in example detection.
All fixes are generic and deterministic.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Allows viewing chunks side-by-side with original PDF in fullscreen mode
for large screen QA review. Toggle via button or close with Escape key.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Default collection changed from bp_compliance_gesetze (DE/AT/CH laws where
PDFs need manual download) to bp_compliance_ce (EU regulations where PDFs
are auto-downloaded). Added HEAD request check so missing PDFs show a clear
"PDF nicht vorhanden" message instead of a 404 in the iframe.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add 4 post-processing steps after OCR (no LLM needed):
1. Character confusion fix: I/1/l/| correction using cross-language
context (if DE has "Ich", EN "1" → "I")
2. IPA dictionary replacement: detect [phonetics] brackets, look up
correct IPA from eng_to_ipa (MIT, 134k words) — replaces OCR'd
phonetic symbols with dictionary-correct transcription
3. Comma-split: "break, broke, broken" / "brechen, brach, gebrochen"
→ 3 individual entries when part counts match
4. Example sentence attachment: rows with EN but no DE translation
get attached as examples to the preceding vocab entry
All fixes are deterministic and generic — no hardcoded word lists.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Root container uses calc(100vh - 220px) for fixed viewport height
- All flex children use min-h-0 to enable proper overflow scrolling
- Removed duplicate bottom nav buttons (Zurueck/Weiter) that appeared
in the middle of the chunk text — navigation is only in the header now
- Chunk text panel scrolls internally with fixed header
- Added prominent article/section badges in header and panel header
- Added chunk length quality indicator (warns on very short/long chunks)
- Structural metadata keys (article, section, pages) sorted first
- Sidebar shows regulation name instead of code for better readability
- PDF viewer uses pages metadata from payload when available
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Preserve \n between visual lines within cells (instead of joining with space)
- Rejoin hyphenated words split across line breaks (e.g. Fuß-\nboden → Fußboden)
- Split oversized rows (>1.5× median height) into sub-entries when EN/DE
line counts match — deterministic fix for missed Step 4 row boundaries
- Frontend: render \n as <br/>, use textarea for multiline editing
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The Qdrant collections use regulation_id (e.g. eu_2016_679) as the filter key,
not regulation_code (e.g. GDPR). Updated rag-constants.ts with correct qdrant_id
mappings from actual Qdrant data, fixed API to filter on regulation_id, and updated
ChunkBrowserQA to pass qdrant_id values.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Switch to PP-OCRv5 Latin model (supports ä, ö, ü, ß)
- Use SERVER model for better accuracy
- Lower Det.unclip_ratio 1.6→1.3 to reduce word merging
- Raise Det.box_thresh 0.5→0.6 for stricter detection
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
New ChunkBrowserQA component replaces inline chunk browser with:
- Document sidebar with live chunk counts per regulation (batched Qdrant count API)
- Sequential chunk navigation with arrow keys (1/N through all chunks of a document)
- Overlap display showing previous/next chunk boundaries (amber-highlighted)
- Split-view with original PDF via iframe (estimated page from chunk index)
- Adjustable chunks-per-page ratio for PDF page estimation
Extracts REGULATIONS_IN_RAG and REGULATION_INFO to shared rag-constants.ts.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Fix A: Use _group_words_into_lines() with adaptive Y-tolerance to
correctly order words in multi-line cells (fixes word reordering bug).
RapidOCR: Add as alternative OCR engine (PaddleOCR models on ONNX
Runtime, native ARM64). Engine selectable via dropdown in UI or
?engine= query param. Auto mode prefers RapidOCR when available.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Document Chunk-Browser tab functionality and API
- Cover scroll endpoint, text search, pagination
- Document Originalquelle links and low-chunk warnings
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
PSM 7 (single line) missed the second line in cells with two lines.
PSM 6 handles multi-line content. Also fix sort order to Y-then-X
for correct reading order.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- New 'Chunk-Browser' tab for sequential chunk browsing
- Qdrant scroll API proxy (scroll + collection-count actions)
- Pagination with prev/next through all chunks in a collection
- Text search filter with highlighting
- Click to expand chunk and see all metadata
- 'In Chunks suchen' button now navigates to Chunk-Browser with correct collection
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Backend: build_word_grid() intersects column regions with content rows,
OCRs each cell with language-specific Tesseract, and returns vocabulary
entries with percent-based bounding boxes. New endpoints: POST /words,
GET /image/words-overlay, ground-truth save/retrieve for words.
Frontend: StepWordRecognition with overview + step-through labeling modes,
goToStep callback for row correction feedback loop.
MkDocs: OCR Pipeline documentation added.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add REGULATION_SOURCES map with 88 original document URLs for all
regulations (EUR-Lex, gesetze-im-internet.de, RIS, Fedlex, etc.)
- Render "Originalquelle →" link in regulation detail panel
- Add amber warning indicator for suspiciously low chunk counts (<10)
- Add EU_IFRS_DE, EU_IFRS_EN, EFRAG_ENDORSEMENT to RAG tracking
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Build a word-coverage mask so only pixels near Tesseract word bounding
boxes contribute to the horizontal projection. Image regions (high ink
but no words) are treated as white, preventing illustrations from
merging multiple vocabulary rows into one.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Insert rows step between columns and words in the pipeline wizard.
Shows overlay image, row list with type badges, and ground truth controls.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add Step 4 (row detection) between column detection and word recognition.
Uses horizontal projection profiles + whitespace gaps (same method as columns).
Includes header/footer classification via gap-size heuristics.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
New regulations across bp_compliance_ce (11), bp_compliance_gesetze (31),
and bp_compliance_datenschutz (1). Collection totals updated:
gesetze 58304, ce 18183, datenschutz 2448, total 103912.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Column detection now uses vertical projection profiles to find whitespace
gaps between columns, then validates gaps against word bounding boxes to
prevent splitting through words. Old clustering algorithm extracted as
fallback (_detect_columns_by_clustering) for pages with < 2 detected gaps.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Local variables named 'isInRag' shadowed the outer function, causing
"isInRag is not a function" error. Renamed to regInRag/codeInRag.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Chunks column now uses getKnownChunks() instead of API-based getRegulationChunks()
- Status column uses isInRag() check (green/red) instead of ratio-based calculation
- Key Intersections chips show green/red with checkmark/cross based on RAG status
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Reduce left-side threshold from 35% to 20% of content width
- Strong language signal (eng/deu > 0.3) now prevents page_ref assignment
- Increase column_ignore word threshold from 3 to 8 for edge columns
- Apply language guard to Level 1 and Level 2 classification
Fixes: column with deu=0.921 was misclassified as page_ref because
reference score check ran before language analysis.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add REGULATIONS_IN_RAG Set tracking all 42 regulations currently in Qdrant
- Add 4 new regulation entries: E-Commerce-RL, Verbraucherrechte-RL,
Digitale-Inhalte-RL, DMA (all ingested Feb 2026)
- Add RAG column to regulations table with green check/red x indicators
- Update Landkarte tab: green/x on industry cards, thematic clusters,
and regulation matrix
- Replace old "Integrated Regulations" section with full RAG coverage overview
- Update hardcoded chunk counts (Templates: 7689, NiBiS: 7996)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Address 5 weaknesses found via ground-truth comparison on session df3548d1:
- Add column_ignore for edge columns with < 3 words (margin detection)
- Absorb tiny clusters (< 5% width) into neighbors post-merge
- Restrict page_ref to left 35% of content area across all 3 levels
- Loosen marker thresholds (width < 6%, words <= 15) and add strong
marker score for very narrow non-edge columns (< 4%)
- Add EN/DE position tiebreaker when language signals are both weak
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Side-by-side view: auto result (readonly) vs GT editor where teacher
draws correct columns. Diff table shows Auto vs GT with IoU matching.
GT data persisted per session for algorithm tuning.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Sub-alignments within a column (indented words, etc.) were 60-90px apart
and not getting merged at 3%. On a typical 5-col page (~1500px), 6% = ~90px
merges sub-alignments while keeping real column boundaries (~300px) separate.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Clusters now track Y-positions of their words and filter by vertical
coverage (>=30% primary, >=15%+5words secondary) to reject noise from
indentations or page numbers. Merge distance widened to 3% content width.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
