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eurosat_s1sar/eurosat_sar.zip

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+version https://git-lfs.github.com/spec/v1
+oid sha256:c88b63d03670df2b30a197cfad4369194f167d0a4ded0a682d9871d7701d61cb
+size 922837319

eurosat_s1sar/senbench_eurosats1_wrapper.py

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+import kornia.augmentation as K
+import torch
+from torchgeo.datasets import EuroSAT
+import os
+from collections.abc import Callable, Sequence
+from torch import Tensor
+import numpy as np
+import rasterio
+from pyproj import Transformer
+from typing import TypeAlias, ClassVar
+import pathlib
+Path: TypeAlias = str | os.PathLike[str]
+
+class SenBenchEuroSATS1(EuroSAT):
+    url = None
+    base_dir = 'all_imgs'
+    splits = ('train', 'val', 'test')
+    split_filenames: ClassVar[dict[str, str]] = {
+        'train': 'eurosat-train.txt',
+        'val': 'eurosat-val.txt',
+        'test': 'eurosat-test.txt',
+    }
+    all_band_names = ('VV','VH')
+
+    def __init__(
+        self,
+        root: Path = 'data',
+        split: str = 'train',
+        bands: Sequence[str] = ['VV','VH'],
+        transforms: Callable[[dict[str, Tensor]], dict[str, Tensor]] | None = None,
+        download: bool = False,
+    ) -> None:
+
+        self.root = root
+        self.transforms = transforms
+        self.download = download
+        #self.checksum = checksum
+
+        assert split in ['train', 'val', 'test']
+
+        self._validate_bands(bands)
+        self.bands = bands
+        self.band_indices = [(self.all_band_names.index(b)+1) for b in bands if b in self.all_band_names]
+
+        self._verify()
+
+        self.valid_fns = []
+        self.classes = []
+        with open(os.path.join(self.root, self.split_filenames[split])) as f:
+            for fn in f:
+                self.valid_fns.append(fn.strip().replace('.jpg', '.tif'))
+                cls_name = fn.strip().split('_')[0]
+                if cls_name not in self.classes:
+                    self.classes.append(cls_name)
+        self.classes = sorted(self.classes)
+
+        self.root = os.path.join(self.root, self.base_dir)
+        #root_path = pathlib.Path(root,split)
+        #self.classes = sorted([d.name for d in root_path.iterdir() if d.is_dir()])
+        self.class_to_idx = {cls_name: i for i, cls_name in enumerate(self.classes)}
+
+        self.patch_area = (16*10/1000)**2 # patchsize 16 pix, gsd 10m
+
+    def __len__(self):
+        return len(self.valid_fns)
+
+    def __getitem__(self, index):
+
+        image, coord, label = self._load_image(index)
+        meta_info = np.array([coord[0], coord[1], np.nan, self.patch_area]).astype(np.float32)
+        sample = {'image': image, 'label': label, 'meta': torch.from_numpy(meta_info)}
+
+        if self.transforms is not None:
+            sample = self.transforms(sample)
+
+        return sample
+
+
+    def _load_image(self, index):
+
+        fname = self.valid_fns[index]
+        dirname = fname.split('_')[0]
+        img_path = os.path.join(self.root, dirname, fname)
+        target = self.class_to_idx[dirname]
+
+        with rasterio.open(img_path) as src:
+            image = src.read(self.band_indices).astype('float32')
+            cx,cy = src.xy(src.height // 2, src.width // 2)
+            if src.crs.to_string() != 'EPSG:4326':
+                crs_transformer = Transformer.from_crs(src.crs, 'epsg:4326', always_xy=True)
+                lon, lat = crs_transformer.transform(cx,cy)
+            else:
+                lon, lat = cx, cy
+
+        return torch.from_numpy(image), (lon,lat), target
+
+
+class ClsDataAugmentation(torch.nn.Module):
+    BAND_STATS = {
+        'mean': {
+            # 'B01': 1353.72696296,
+            # 'B02': 1117.20222222,
+            # 'B03': 1041.8842963,
+            # 'B04': 946.554,
+            # 'B05': 1199.18896296,
+            # 'B06': 2003.00696296,
+            # 'B07': 2374.00874074,
+            # 'B08': 2301.22014815,
+            # 'B8A': 2599.78311111,
+            # 'B09': 732.18207407,
+            # 'B10': 12.09952894,
+            # 'B11': 1820.69659259,
+            # 'B12': 1118.20259259,
+            'VV': -12.54847273,
+            'VH': -20.19237134
+        },
+        'std': {
+            # 'B01': 897.27143653,
+            # 'B02': 736.01759721,
+            # 'B03': 684.77615743,
+            # 'B04': 620.02902871,
+            # 'B05': 791.86263829,
+            # 'B06': 1341.28018273,
+            # 'B07': 1595.39989386,
+            # 'B08': 1545.52915718,
+            # 'B8A': 1750.12066835,
+            # 'B09': 475.11595216,
+            # 'B10': 98.26600935,
+            # 'B11': 1216.48651476,
+            # 'B12': 736.6981037,
+            'VV': 5.25697717,
+            'VH': 5.91150917
+        }
+    }
+
+    def __init__(self, split, size, bands):
+        super().__init__()
+
+        mean = []
+        std = []
+        for band in bands:
+            mean.append(self.BAND_STATS['mean'][band])
+            std.append(self.BAND_STATS['std'][band])
+        mean = torch.Tensor(mean)
+        std = torch.Tensor(std)
+
+        if split == "train":
+            self.transform = torch.nn.Sequential(
+                K.Normalize(mean=mean, std=std),
+                K.Resize(size=size, align_corners=True),
+                K.RandomHorizontalFlip(p=0.5),
+                K.RandomVerticalFlip(p=0.5),
+            )
+        else:
+            self.transform = torch.nn.Sequential(
+                K.Normalize(mean=mean, std=std),
+                K.Resize(size=size, align_corners=True),
+            )
+
+    @torch.no_grad()
+    def forward(self, batch: dict[str,]):
+        """Torchgeo returns a dictionary with 'image' and 'label' keys, but engine expects a tuple"""
+        x_out = self.transform(batch["image"]).squeeze(0)
+        return x_out, batch["label"], batch["meta"]
+
+
+class SenBenchEuroSATS1Dataset:
+    def __init__(self, config):
+        self.dataset_config = config
+        self.img_size = (config.image_resolution, config.image_resolution)
+        self.root_dir = config.data_path
+        self.bands = config.band_names
+
+    def create_dataset(self):
+        train_transform = ClsDataAugmentation(split="train", size=self.img_size, bands=self.bands)
+        eval_transform = ClsDataAugmentation(split="test", size=self.img_size, bands=self.bands)
+
+        dataset_train = SenBenchEuroSATS1(
+            root=self.root_dir, split="train", bands=self.bands, transforms=train_transform
+        )
+        dataset_val = SenBenchEuroSATS1(
+            root=self.root_dir, split="val", bands=self.bands, transforms=eval_transform
+        )
+        dataset_test = SenBenchEuroSATS1(
+            root=self.root_dir, split="test", bands=self.bands, transforms=eval_transform
+        )
+
+        return dataset_train, dataset_val, dataset_test