Module image_preprocessing 

Image Preprocessing for Computer Vision Applications

This module provides comprehensive image preprocessing utilities for computer vision and machine learning tasks, including normalization, data augmentation, color space transformations, and feature extraction.

Features

• Image normalization and standardization
• Data augmentation techniques (rotation, scaling, flipping, cropping)
• Color space transformations (RGB, HSV, LAB, grayscale)
• Image resizing and cropping
• Edge detection and feature extraction
• Batch image processing with parallel support

Examples

use sklears_preprocessing::image_preprocessing::{
    ImageNormalizer, ImageAugmenter, ColorSpaceTransformer
};
use scirs2_core::ndarray::Array3;

fn example() -> Result<(), Box<dyn std::error::Error>> {
    // Normalize image pixel values to [0, 1] range
    let normalizer = ImageNormalizer::new()
        .with_range((0.0, 1.0))
        .with_channel_wise(true);

    let image = Array3::<f64>::zeros((224, 224, 3)); // RGB image
    let normalized = normalizer.transform(&image)?;

    // Apply data augmentation
    let augmenter = ImageAugmenter::new()
        .with_rotation_range((-15.0, 15.0))
        .with_zoom_range((0.9, 1.1))
        .with_horizontal_flip(true);

    let augmented = augmenter.transform(&normalized)?;

    // Convert color space
    let color_transformer = ColorSpaceTransformer::new()
        .from_rgb()
        .to_hsv();

    let hsv_image = color_transformer.transform(&augmented)?;

    Ok(())
}

Structs

ColorSpaceTransformer

Color space transformer

EdgeDetector

Edge detector for feature extraction

ImageAugmenter

Image augmenter for data augmentation

ImageAugmenterConfig

Configuration for image augmentation

ImageFeatureExtractor

Basic feature extractor for images

ImageNormalizer

Image normalizer for preprocessing image data

ImageNormalizerConfig

Configuration for image normalization

ImageNormalizerFitted

Fitted state for image normalizer

ImageResizer

Image resizer for changing image dimensions

Enums

ColorSpace

Color space types for image transformations

EdgeDetectionMethod

Edge detection methods

ImageNormalizationStrategy

Image normalization strategies

InterpolationMethod

Image resizing interpolation methods