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AINLPBackend
AI-Based Invoice Data to JSON Parser
Hybrid AI-based invoice parsing system that extracts structured information from PDF, image, Excel, and CSV invoices and converts it into standardized JSON.
Architecture
Multi-format document ingestion (PDF, Image, Excel, CSV)
OCR, regex, and NLP preprocessing
LLM fallback parsing engine
Pydantic schema validation & error checks
FastAPI REST endpoint & Docker container
Results
Standardized key field extraction into structured JSON format.
Deployed containerized REST API with interactive Swagger documentation.
Challenges
Handling layout variations across different invoice vendors
Noisy OCR text extraction on low-resolution scans
Ensuring schema compliance across multi-line items
Future Improvements
Async background job queueExtraction confidence scoringTemplate-less field mapping customization