Spaces:
Runtime error
Runtime error
| # Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved. | |
| # | |
| # NVIDIA CORPORATION and its licensors retain all intellectual property | |
| # and proprietary rights in and to this software, related documentation | |
| # and any modifications thereto. Any use, reproduction, disclosure or | |
| # distribution of this software and related documentation without an express | |
| # license agreement from NVIDIA CORPORATION is strictly prohibited. | |
| import os | |
| import numpy as np | |
| import zipfile | |
| import PIL.Image | |
| import json | |
| import torch | |
| import dnnlib | |
| try: | |
| import pyspng | |
| except ImportError: | |
| pyspng = None | |
| #---------------------------------------------------------------------------- | |
| class Dataset(torch.utils.data.Dataset): | |
| def __init__(self, | |
| name, # Name of the dataset. | |
| raw_shape, # Shape of the raw image data (NCHW). | |
| max_size = None, # Artificially limit the size of the dataset. None = no limit. Applied before xflip. | |
| use_labels = False, # Enable conditioning labels? False = label dimension is zero. | |
| xflip = False, # Artificially double the size of the dataset via x-flips. Applied after max_size. | |
| random_seed = 0, # Random seed to use when applying max_size. | |
| ): | |
| self._name = name | |
| self._raw_shape = list(raw_shape) | |
| self._use_labels = use_labels | |
| self._raw_labels = None | |
| self._label_shape = None | |
| # Apply max_size. | |
| self._raw_idx = np.arange(self._raw_shape[0], dtype=np.int64) | |
| if (max_size is not None) and (self._raw_idx.size > max_size): | |
| np.random.RandomState(random_seed).shuffle(self._raw_idx) | |
| self._raw_idx = np.sort(self._raw_idx[:max_size]) | |
| # Apply xflip. | |
| self._xflip = np.zeros(self._raw_idx.size, dtype=np.uint8) | |
| if xflip: | |
| self._raw_idx = np.tile(self._raw_idx, 2) | |
| self._xflip = np.concatenate([self._xflip, np.ones_like(self._xflip)]) | |
| def _get_raw_labels(self): | |
| if self._raw_labels is None: | |
| self._raw_labels = self._load_raw_labels() if self._use_labels else None | |
| if self._raw_labels is None: | |
| self._raw_labels = np.zeros([self._raw_shape[0], 0], dtype=np.float32) | |
| assert isinstance(self._raw_labels, np.ndarray) | |
| assert self._raw_labels.shape[0] == self._raw_shape[0] | |
| assert self._raw_labels.dtype in [np.float32, np.int64] | |
| if self._raw_labels.dtype == np.int64: | |
| assert self._raw_labels.ndim == 1 | |
| assert np.all(self._raw_labels >= 0) | |
| return self._raw_labels | |
| def close(self): # to be overridden by subclass | |
| pass | |
| def _load_raw_image(self, raw_idx): # to be overridden by subclass | |
| raise NotImplementedError | |
| def _load_raw_labels(self): # to be overridden by subclass | |
| raise NotImplementedError | |
| def __getstate__(self): | |
| return dict(self.__dict__, _raw_labels=None) | |
| def __del__(self): | |
| try: | |
| self.close() | |
| except: | |
| pass | |
| def __len__(self): | |
| return self._raw_idx.size | |
| def __getitem__(self, idx): | |
| image = self._load_raw_image(self._raw_idx[idx]) | |
| assert isinstance(image, np.ndarray) | |
| assert list(image.shape) == self.image_shape | |
| assert image.dtype == np.uint8 | |
| if self._xflip[idx]: | |
| assert image.ndim == 3 # CHW | |
| image = image[:, :, ::-1] | |
| return image.copy(), self.get_label(idx) | |
| def get_label(self, idx): | |
| label = self._get_raw_labels()[self._raw_idx[idx]] | |
| if label.dtype == np.int64: | |
| onehot = np.zeros(self.label_shape, dtype=np.float32) | |
| onehot[label] = 1 | |
| label = onehot | |
| return label.copy() | |
| def get_details(self, idx): | |
| d = dnnlib.EasyDict() | |
| d.raw_idx = int(self._raw_idx[idx]) | |
| d.xflip = (int(self._xflip[idx]) != 0) | |
| d.raw_label = self._get_raw_labels()[d.raw_idx].copy() | |
| return d | |
| def name(self): | |
| return self._name | |
| def image_shape(self): | |
| return list(self._raw_shape[1:]) | |
| def num_channels(self): | |
| assert len(self.image_shape) == 3 # CHW | |
| return self.image_shape[0] | |
| def resolution(self): | |
| assert len(self.image_shape) == 3 # CHW | |
| assert self.image_shape[1] == self.image_shape[2] | |
| return self.image_shape[1] | |
| def label_shape(self): | |
| if self._label_shape is None: | |
| raw_labels = self._get_raw_labels() | |
| if raw_labels.dtype == np.int64: | |
| self._label_shape = [int(np.max(raw_labels)) + 1] | |
| else: | |
| self._label_shape = raw_labels.shape[1:] | |
| return list(self._label_shape) | |
| def label_dim(self): | |
| assert len(self.label_shape) == 1 | |
| return self.label_shape[0] | |
| def has_labels(self): | |
| return any(x != 0 for x in self.label_shape) | |
| def has_onehot_labels(self): | |
| return self._get_raw_labels().dtype == np.int64 | |
| #---------------------------------------------------------------------------- | |
| class ImageFolderDataset(Dataset): | |
| def __init__(self, | |
| path, # Path to directory or zip. | |
| resolution = None, # Ensure specific resolution, None = highest available. | |
| **super_kwargs, # Additional arguments for the Dataset base class. | |
| ): | |
| self._path = path | |
| self._zipfile = None | |
| if os.path.isdir(self._path): | |
| self._type = 'dir' | |
| self._all_fnames = {os.path.relpath(os.path.join(root, fname), start=self._path) for root, _dirs, files in os.walk(self._path) for fname in files} | |
| elif self._file_ext(self._path) == '.zip': | |
| self._type = 'zip' | |
| self._all_fnames = set(self._get_zipfile().namelist()) | |
| else: | |
| raise IOError('Path must point to a directory or zip') | |
| PIL.Image.init() | |
| self._image_fnames = sorted(fname for fname in self._all_fnames if self._file_ext(fname) in PIL.Image.EXTENSION) | |
| if len(self._image_fnames) == 0: | |
| raise IOError('No image files found in the specified path') | |
| name = os.path.splitext(os.path.basename(self._path))[0] | |
| raw_shape = [len(self._image_fnames)] + list(self._load_raw_image(0).shape) | |
| if resolution is not None and (raw_shape[2] != resolution or raw_shape[3] != resolution): | |
| raise IOError('Image files do not match the specified resolution') | |
| super().__init__(name=name, raw_shape=raw_shape, **super_kwargs) | |
| def _file_ext(fname): | |
| return os.path.splitext(fname)[1].lower() | |
| def _get_zipfile(self): | |
| assert self._type == 'zip' | |
| if self._zipfile is None: | |
| self._zipfile = zipfile.ZipFile(self._path) | |
| return self._zipfile | |
| def _open_file(self, fname): | |
| if self._type == 'dir': | |
| return open(os.path.join(self._path, fname), 'rb') | |
| if self._type == 'zip': | |
| return self._get_zipfile().open(fname, 'r') | |
| return None | |
| def close(self): | |
| try: | |
| if self._zipfile is not None: | |
| self._zipfile.close() | |
| finally: | |
| self._zipfile = None | |
| def __getstate__(self): | |
| return dict(super().__getstate__(), _zipfile=None) | |
| def _load_raw_image(self, raw_idx): | |
| fname = self._image_fnames[raw_idx] | |
| with self._open_file(fname) as f: | |
| if pyspng is not None and self._file_ext(fname) == '.png': | |
| image = pyspng.load(f.read()) | |
| else: | |
| image = np.array(PIL.Image.open(f)) | |
| if image.ndim == 2: | |
| image = image[:, :, np.newaxis] # HW => HWC | |
| image = image.transpose(2, 0, 1) # HWC => CHW | |
| return image | |
| def _load_raw_labels(self): | |
| fname = 'dataset.json' | |
| if fname not in self._all_fnames: | |
| return None | |
| with self._open_file(fname) as f: | |
| labels = json.load(f)['labels'] | |
| if labels is None: | |
| return None | |
| labels = dict(labels) | |
| labels = [labels[fname.replace('\\', '/')] for fname in self._image_fnames] | |
| labels = np.array(labels) | |
| labels = labels.astype({1: np.int64, 2: np.float32}[labels.ndim]) | |
| return labels | |
| #---------------------------------------------------------------------------- | |