src/data/README.md

Data Module

Per-modality preprocessing for satellite imagery.

Files

File	Description
preprocessing.py	Per-modality transforms (optical, SAR, multispectral)
dataset.py	Dataset loading, splitting, and DataLoader creation

Supported Modalities

Modality	Channels	Description
Optical	3 (RGB)	Sentinel-2 bands B4, B3, B2
SAR	2 (VV/VH)	Sentinel-1 C-band
Multispectral	12	Sentinel-2 all bands

Usage

from src.data.preprocessing import preprocess_image
from src.data.dataset import CrisisLandMarkDataset, create_splits

# Preprocess a single image
tensor = preprocess_image(image, modality="optical", size=224)

# Create dataset
dataset = CrisisLandMarkDataset(modality="optical")

# Split into query/gallery
query_idx, gallery_idx = create_splits(dataset, query_ratio=0.2)