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Source code for torchgeo.datamodules.vaihingen

# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License.

"""Vaihingen datamodule."""

from typing import Any, Union

import kornia.augmentation as K

from ..datasets import Vaihingen2D
from ..samplers.utils import _to_tuple
from ..transforms import AugmentationSequential
from ..transforms.transforms import _RandomNCrop
from .geo import NonGeoDataModule
from .utils import dataset_split


[docs]class Vaihingen2DDataModule(NonGeoDataModule): """LightningDataModule implementation for the Vaihingen2D dataset. Uses the train/test splits from the dataset. .. versionadded:: 0.2 """
[docs] def __init__( self, batch_size: int = 64, patch_size: Union[tuple[int, int], int] = 64, val_split_pct: float = 0.2, num_workers: int = 0, **kwargs: Any, ) -> None: """Initialize a new Vaihingen2DDataModule instance. Args: batch_size: Size of each mini-batch. patch_size: Size of each patch, either ``size`` or ``(height, width)``. Should be a multiple of 32 for most segmentation architectures. val_split_pct: Percentage of the dataset to use as a validation set. num_workers: Number of workers for parallel data loading. **kwargs: Additional keyword arguments passed to :class:`~torchgeo.datasets.Vaihingen2D`. """ super().__init__(Vaihingen2D, 1, num_workers, **kwargs) self.patch_size = _to_tuple(patch_size) self.val_split_pct = val_split_pct self.aug = AugmentationSequential( K.Normalize(mean=self.mean, std=self.std), _RandomNCrop(self.patch_size, batch_size), data_keys=["image", "mask"], )
[docs] def setup(self, stage: str) -> None: """Set up datasets. Args: stage: Either 'fit', 'validate', 'test', or 'predict'. """ if stage in ["fit", "validate"]: self.dataset = Vaihingen2D(split="train", **self.kwargs) self.train_dataset, self.val_dataset = dataset_split( self.dataset, self.val_split_pct ) if stage in ["test"]: self.test_dataset = Vaihingen2D(split="test", **self.kwargs)

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