Module image 

Utility functions for image processing.

This module provides functions for loading, converting, and manipulating images in the OCR pipeline. It includes functions for converting between different image formats, loading single or batch images from files, creating images from raw data, and resize-and-pad operations.

Structs

OCRResizePadConfig

Configuration for OCR-style resize-and-pad operations with width constraints.

ResizePadConfig

Configuration for resize-and-pad operations.

Enums

PaddingStrategy

Padding strategy for resize-and-pad operations.

Functions

calculate_center_crop_coords

Calculates centered crop coordinates for a target size.

check_image_size

Checks if the given image size is valid (non-zero dimensions).

create_rgb_image

Creates an RgbImage from raw pixel data.

dynamic_to_gray

Converts a DynamicImage to a GrayImage.

dynamic_to_rgb

Converts a DynamicImage to an RgbImage.

load_image

Loads an image from a file path and converts it to RgbImage.

load_image_from_memory

Loads an image from the given bytes and converts it to RgbImage.

load_images

Loads a batch of images from file paths.

load_images_batch_with_policy

Load multiple images from file paths using centralized parallel policy.

load_images_batch_with_threshold

Loads a batch of images from file paths with a custom parallel threshold.

mask_region

Masks a rectangular region in an RGB image with a solid color.

mask_regions

Masks multiple bounding box regions in an RGB image.

ocr_resize_and_pad

Resize an image for OCR processing with width constraints and padding.

pad_image

Pads an image to the specified dimensions with a fill color.

resize_and_pad

Resize an image to fit within target dimensions while maintaining aspect ratio, then pad to exact target dimensions.

resize_gray_image

Resizes a grayscale image to the target dimensions using Lanczos3 filtering.

resize_image

Resizes an RGB image to the target dimensions using Lanczos3 filtering.

resize_images_batch

Resizes a batch of images to the specified dimensions.

resize_images_batch_to_dynamic

Resizes a batch of images and converts them to DynamicImage format.

rgb_to_grayscale

Converts an RGB image to grayscale.

slice_gray_image

Extracts a rectangular region from a grayscale image.

slice_image

Extracts a rectangular region from an RGB image.

validate_crop_bounds

Validates that crop coordinates stay within image bounds.