Spaces:
Build error
Build error
File size: 1,049 Bytes
8f87579 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 |
from io import BytesIO
import lmdb
from PIL import Image
from torch.utils.data import Dataset
class MultiResolutionDataset(Dataset):
def __init__(self, path, transform, resolution=256):
self.env = lmdb.open(
path,
max_readers=32,
readonly=True,
lock=False,
readahead=False,
meminit=False,
)
if not self.env:
raise IOError('Cannot open lmdb dataset', path)
with self.env.begin(write=False) as txn:
self.length = int(txn.get('length'.encode('utf-8')).decode('utf-8'))
self.resolution = resolution
self.transform = transform
def __len__(self):
return self.length
def __getitem__(self, index):
with self.env.begin(write=False) as txn:
key = f'{self.resolution}-{str(index).zfill(5)}'.encode('utf-8')
img_bytes = txn.get(key)
buffer = BytesIO(img_bytes)
img = Image.open(buffer)
img = self.transform(img)
return img
|