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9 Commits

Author SHA1 Message Date
Marcel
6faaa3b7d6 feat(ocr): add pyspellchecker dependency 
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-17 16:41:24 +02:00
Marcel
615d404ba9 chore(ocr): add opencv-python-headless, libglib2.0-0, and CLAHE env vars 
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-17 14:14:47 +02:00
Marcel
31519af1a4 fix(ocr): add pyvips for kraken PDF input support
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Kraken 7 requires pyvips (optional dep) for -f pdf mode.
Added libvips42 system package and pyvips Python package.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-12 20:11:14 +02:00
Marcel
37abc376ec fix(ocr): install torchvision from CPU index alongside torch
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torchvision installed from PyPI expects CUDA torch operator
registrations. Installing from the CPU whl index ensures torchvision
matches the CPU-only torch build. Fixes 'torchvision::nms does not
exist' RuntimeError on startup.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-12 19:46:37 +02:00
Marcel
6669fffead fix(ocr): pin transformers<5.0 and torch==2.7.1 in requirements.txt
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transformers 5.x breaks surya 0.17.1 — SuryaDecoderConfig is missing
pad_token_id. Pin to transformers>=4.56.1,<5.0.0.

Also add torch==2.7.1 to requirements.txt to prevent pip from upgrading
it past the CPU-only build installed in the Dockerfile layer.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-12 19:34:03 +02:00
Marcel
49975154d9 feat(ocr): bump to latest surya 0.17.1, kraken 7.0, torch 2.7.1
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- surya-ocr 0.6.3 → 0.17.1: new predictor API (FoundationPredictor,
  RecognitionPredictor, DetectionPredictor), native polygon output
  on text lines (4-point clockwise)
- kraken 5.2.9 → 7.0: wider torch range (>=2.4,<=2.10), unpinned numpy
- torch 2.5.1 → 2.7.1: satisfies surya's >=2.7.0 requirement
- Rewrite engines/surya.py for the 0.17 predictor class API
- Surya now outputs polygons natively — no longer rectangle-only

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-12 18:53:14 +02:00
Marcel
e29c865016 fix(ocr): upgrade kraken to 6.0.3 for torch>=2.4 compatibility
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kraken 5.2.9 required torch~=2.1.0, incompatible with surya-ocr's
torch>=2.3.0. kraken 6.0.3 requires torch>=2.4.0,<=2.9 which
overlaps with surya and our pinned torch==2.5.1.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-12 18:48:14 +02:00
Marcel
d49010cd7b fix(ocr): relax pillow version to match surya-ocr constraint
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surya-ocr 0.6.3 requires pillow<11.0.0,>=10.2.0. The previous
pin at 11.1.0 caused a dependency resolution failure during
Docker build.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-12 18:40:46 +02:00
Marcel
6737bd6db5 feat(ocr): add Python OCR microservice, RestClientOcrClient, Docker Compose 
Python microservice (ocr-service/):
- FastAPI app with /ocr and /health endpoints
- Surya engine: transformer-based OCR for typewritten/modern handwriting
- Kraken engine: historical HTR for Kurrent/Suetterlin with
  pure-Python polygon-to-quad approximation (gift wrapping + rotating calipers)
- Eager model loading at startup via lifespan context manager
- PDF download via httpx, page rendering via pypdfium2 at 300 DPI

Java RestClientOcrClient:
- Implements OcrClient + OcrHealthClient interfaces
- Calls Python service via Spring RestClient
- Health check with graceful fallback

Docker Compose:
- New ocr-service container (mem_limit 6g, no host ports)
- Health check with start_period 60s for model loading
- ocr_models volume for Kraken model files
- Backend depends on ocr-service health

Refs #226, #227

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-12 15:26:40 +02:00