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feat: add receipt OCR pipeline (refs #69)
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Implement receipt-specific OCR extraction for fuel receipts:

- Pattern matching modules for date, currency, and fuel data extraction
- Receipt-optimized image preprocessing for thermal receipts
- POST /extract/receipt endpoint with field extraction
- Confidence scoring per extracted field
- Cross-validation of fuel receipt data
- Unit tests for all pattern matchers

Extracted fields: merchantName, transactionDate, totalAmount,
fuelQuantity, pricePerUnit, fuelGrade

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Eric Gullickson
2026-02-01 20:43:30 -06:00
parent a2f0abb14c
commit 6319d50fb1
16 changed files with 2845 additions and 2 deletions
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13
ocr/app/patterns/__init__.py Normal file
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"""Pattern matching modules for receipt field extraction."""
from app.patterns.date_patterns import DatePatternMatcher, date_matcher
from app.patterns.currency_patterns import CurrencyPatternMatcher, currency_matcher
from app.patterns.fuel_patterns import FuelPatternMatcher, fuel_matcher
__all__ = [
"DatePatternMatcher",
"date_matcher",
"CurrencyPatternMatcher",
"currency_matcher",
"FuelPatternMatcher",
"fuel_matcher",
]