backend/app/ocr/backends/__init__.py

"""Pluggable OCR backends.

The OCR channel of the hybrid extractor is backend-agnostic. Each backend
implements `OCRBackend.extract(path) -> OCRBackendResult`. Selection is by name
(`OCR_BACKEND`) or a per-request override, with a graceful fallback chain so a
missing GPU / key / endpoint never breaks a run.

Backends:
  • minicpm    — MiniCPM-V-4.6 via an OpenAI-compatible server (vLLM / llama.cpp)
  • cohere     — a Cohere vision/OCR model from HuggingFace (transformers)
  • llamaparse — LlamaParse (LlamaCloud)
  • tesseract  — Tesseract OCR
  • easyocr    — EasyOCR
  • sidecar    — deterministic offline fallback (reads <stem>.txt)
"""
from .base import OCRBackend, OCRBackendResult
from .registry import (
    OCRRegistry,
    build_ocr_registry,
    list_backends,
)

__all__ = [
    "OCRBackend",
    "OCRBackendResult",
    "OCRRegistry",
    "build_ocr_registry",
    "list_backends",
]