Module ocr 

OCR backend trait and implementations.

OCR Backend Extension

The OcrBackend trait is public. Callers can implement their own backends for specific use cases:

• ocrs (this crate, ocr feature): pure-Rust Tesseract-style engine. WASM-compatible. Requires external model files (.rten format).

• Mistral OCR (ocr-mistral feature): blocking HTTP adapter to Mistral’s cloud OCR API.

• Google Vision (ocr-google feature): blocking HTTP adapter to Google Cloud Vision’s images:annotate OCR endpoint.

• AWS Textract (ocr-aws feature): blocking HTTP adapter to Amazon Textract’s DetectDocumentText endpoint.

• Azure Document Intelligence (ocr-azure feature): blocking HTTP adapter to the prebuilt-read model.

• Paddle ONNX (ocr-onnx feature): adapter around pdf-ocr’s PaddleOCR engine.

• Custom: implement OcrBackend directly for proprietary or cloud-based OCR flows.

Structs

OcrResult

Result of recognizing text in a single image.

OcrWord

A single recognized word.

Enums

OcrError

Errors returned by an OcrBackend.

Traits

OcrBackend

Pluggable OCR backend.

Functions

best_available_backend

Return the first available OCR backend in priority order.