Module earthvision.datasets.so2sat
So2Sat Dataset to Predict Local Climate Zone (LCZ).
Expand source code
"""So2Sat Dataset to Predict Local Climate Zone (LCZ)."""
from PIL import Image
import os
import posixpath
import numpy as np
import h5py
from typing import Any, Callable, Optional, Tuple
from .utils import _urlretrieve
from .vision import VisionDataset
class So2Sat(VisionDataset):
"""So2Sat Dataset to Predict Local Climate Zone (LCZ):
<https://mediatum.ub.tum.de/1454690>
Args:
root (string): Root directory of dataset.
train (bool, optional): If True, creates dataset from training set, otherwise
creates from validation set.
transform (callable, optional): A function/transform that takes in an PIL image and
returns a transformed version. E.g, transforms.RandomCrop
target_transform (callable, optional): A function/transform that takes in the
target and transforms it.
download (bool, optional): If true, downloads the dataset from the internet and
puts it in root directory. If dataset is already downloaded, it is not
downloaded again.
"""
mirrors = "https://dataserv.ub.tum.de/s/m1454690/download?path=/&files="
resources = ["training.h5", "validation.h5"]
def __init__(
self,
root: str,
train: bool = True,
transform: Optional[Callable] = None,
target_transform: Optional[Callable] = None,
download: bool = True,
) -> None:
super(So2Sat, self).__init__(root, transform=transform, target_transform=target_transform)
self.root = root
self.data_mode = "training" if train else "validation"
if download and self._check_exists():
print("file already exists.")
if download and not self._check_exists():
self.download()
self.img_labels = self.get_path_and_label()
def __len__(self) -> int:
return len(self.img_labels)
def __getitem__(self, idx: int) -> Tuple[Any, Any, Any]:
"""
Args:
idx (int): Index
Returns:
tuple: (sen1, sen2, label)
"""
sen1 = self.img_labels["sen1"][idx]
sen2 = self.img_labels["sen2"][idx]
label = self.img_labels["label"][idx]
if self.transform is not None:
sen1 = Image.fromarray(sen1)
sen1 = self.transform(sen1)
sen2 = Image.fromarray(sen2)
sen2 = self.transform(sen2)
if self.target_transform is not None:
label = Image.fromarray(label)
label = self.target_transform(label)
return (sen1, sen2, label)
def get_path_and_label(self):
"""Return dataframe type consist of image path and corresponding label."""
file = h5py.File(os.path.join(self.root, f"{self.data_mode}.h5"), "r")
sen1 = np.array(file["sen1"])
sen2 = np.array(file["sen2"])
label = np.array(file["label"])
return {"sen1": sen1, "sen2": sen2, "label": label}
def _check_exists(self):
return os.path.exists(os.path.join(self.root, self.resources[0])) and os.path.exists(
os.path.join(self.root, self.resources[1])
)
def download(self):
"""Download and extract file."""
if not os.path.exists(self.root):
os.makedirs(self.root)
for resource in self.resources:
file_url = posixpath.join(self.mirrors, resource)
_urlretrieve(file_url, os.path.join(self.root, resource))
Classes
class So2Sat (root: str, train: bool = True, transform: Optional[Callable] = None, target_transform: Optional[Callable] = None, download: bool = True)
-
So2Sat Dataset to Predict Local Climate Zone (LCZ):
https://mediatum.ub.tum.de/1454690
Args
root
:string
- Root directory of dataset.
train
:bool
, optional- If True, creates dataset from training set, otherwise creates from validation set.
transform
:callable
, optional- A function/transform that takes in an PIL image and returns a transformed version. E.g, transforms.RandomCrop
target_transform
:callable
, optional- A function/transform that takes in the target and transforms it.
download
:bool
, optional- If true, downloads the dataset from the internet and puts it in root directory. If dataset is already downloaded, it is not downloaded again.
Expand source code
class So2Sat(VisionDataset): """So2Sat Dataset to Predict Local Climate Zone (LCZ): <https://mediatum.ub.tum.de/1454690> Args: root (string): Root directory of dataset. train (bool, optional): If True, creates dataset from training set, otherwise creates from validation set. transform (callable, optional): A function/transform that takes in an PIL image and returns a transformed version. E.g, transforms.RandomCrop target_transform (callable, optional): A function/transform that takes in the target and transforms it. download (bool, optional): If true, downloads the dataset from the internet and puts it in root directory. If dataset is already downloaded, it is not downloaded again. """ mirrors = "https://dataserv.ub.tum.de/s/m1454690/download?path=/&files=" resources = ["training.h5", "validation.h5"] def __init__( self, root: str, train: bool = True, transform: Optional[Callable] = None, target_transform: Optional[Callable] = None, download: bool = True, ) -> None: super(So2Sat, self).__init__(root, transform=transform, target_transform=target_transform) self.root = root self.data_mode = "training" if train else "validation" if download and self._check_exists(): print("file already exists.") if download and not self._check_exists(): self.download() self.img_labels = self.get_path_and_label() def __len__(self) -> int: return len(self.img_labels) def __getitem__(self, idx: int) -> Tuple[Any, Any, Any]: """ Args: idx (int): Index Returns: tuple: (sen1, sen2, label) """ sen1 = self.img_labels["sen1"][idx] sen2 = self.img_labels["sen2"][idx] label = self.img_labels["label"][idx] if self.transform is not None: sen1 = Image.fromarray(sen1) sen1 = self.transform(sen1) sen2 = Image.fromarray(sen2) sen2 = self.transform(sen2) if self.target_transform is not None: label = Image.fromarray(label) label = self.target_transform(label) return (sen1, sen2, label) def get_path_and_label(self): """Return dataframe type consist of image path and corresponding label.""" file = h5py.File(os.path.join(self.root, f"{self.data_mode}.h5"), "r") sen1 = np.array(file["sen1"]) sen2 = np.array(file["sen2"]) label = np.array(file["label"]) return {"sen1": sen1, "sen2": sen2, "label": label} def _check_exists(self): return os.path.exists(os.path.join(self.root, self.resources[0])) and os.path.exists( os.path.join(self.root, self.resources[1]) ) def download(self): """Download and extract file.""" if not os.path.exists(self.root): os.makedirs(self.root) for resource in self.resources: file_url = posixpath.join(self.mirrors, resource) _urlretrieve(file_url, os.path.join(self.root, resource))
Ancestors
- VisionDataset
- torch.utils.data.dataset.Dataset
- typing.Generic
Class variables
var functions : Dict[str, Callable]
var mirrors
var resources
Methods
def download(self)
-
Download and extract file.
Expand source code
def download(self): """Download and extract file.""" if not os.path.exists(self.root): os.makedirs(self.root) for resource in self.resources: file_url = posixpath.join(self.mirrors, resource) _urlretrieve(file_url, os.path.join(self.root, resource))
def get_path_and_label(self)
-
Return dataframe type consist of image path and corresponding label.
Expand source code
def get_path_and_label(self): """Return dataframe type consist of image path and corresponding label.""" file = h5py.File(os.path.join(self.root, f"{self.data_mode}.h5"), "r") sen1 = np.array(file["sen1"]) sen2 = np.array(file["sen2"]) label = np.array(file["label"]) return {"sen1": sen1, "sen2": sen2, "label": label}