Module oarocr 

The main OCR pipeline implementation.

This module provides the complete OCR pipeline that combines multiple components to perform document orientation classification, text detection, text recognition, and text line classification.

Orchestration Architecture

The pipeline has been refactored to use a unified orchestration system that eliminates code duplication and provides better maintainability. The key improvements include:

Unified Processing Logic

Previously, methods like process_single_image, process_single_image_from_memory, process_images_individually, and process_images_from_memory contained duplicated orchestration logic for:

• Parallel vs sequential processing decisions
• Index management and result sorting
• Pipeline stage execution patterns
• Error handling and logging

Now, all these methods use the orchestration module’s abstractions:

• ImageProcessingOrchestrator for batch processing coordination
• PipelineExecutor for unified stage execution
• ProcessingStrategy for configurable parallelism
• ImageInputSource for input abstraction

Benefits

• Reduced Duplication: ~200 lines of duplicated code eliminated
• Improved Maintainability: Changes to orchestration logic in one place
• Better Testability: Each orchestration component can be tested independently
• Type Safety: Compile-time prevention of invalid configurations
• Consistent Behavior: All processing paths use the same underlying logic

Backward Compatibility

The public API remains unchanged. All existing code using OAROCR::predict and related methods will continue to work without modification.

Re-exports

pub use config::OnnxThreadingConfig;

pub use config::ParallelPolicy;

Structs

ErrorMetrics

Error metrics for monitoring data quality and model performance issues.

ExtensibleOAROCR

Integration wrapper that bridges the extensible pipeline with OAROCR.

ExtensibleOAROCRBuilder

Builder for creating ExtensibleOAROCR instances.

ImageProcessingOrchestrator

Main orchestrator for image processing operations.

ImageProcessor

Image processing utilities for the OAROCR pipeline.

OAROCR

The main OCR pipeline that combines multiple components to perform document processing and text recognition.

OAROCRBuilder

Builder for creating OAROCR instances.

OAROCRConfig

OAROCRResult

Result of the OAROCR pipeline execution.

PipelineExecutor

Executor for OCR pipeline stages with configurable entry points.

PipelineStageConfig

Configuration for pipeline stage execution

SingleImageProcessingParams

TextRegion

A text region containing detection and recognition results.

Enums

ImageInputSource

Represents different sources of image input for processing.

PipelineStage

Represents different stages in the OCR pipeline

ProcessingStrategy

Strategy for processing multiple images

Functions

configure_thread_pool_once

Configures the global rayon thread pool if not already configured.