def create_transform(input_size,
is_training=False,
use_prefetcher=False,
color_jitter=0.4,
auto_augment=None,
interpolation='bilinear',
mean=IMAGENET_DEFAULT_MEAN,
std=IMAGENET_DEFAULT_STD,
re_prob=0.,
re_mode='const',
re_count=1,
re_num_splits=0,
crop_pct=None,
tf_preprocessing=False,
separate=False,
squish=False,
min_crop_factor=0.08,
do_8_rotations=False):
if isinstance(input_size, tuple):
img_size = input_size[-2:]
else:
img_size = input_size
if tf_preprocessing and use_prefetcher:
assert not separate, "Separate transforms not supported for TF preprocessing"
from timm.data.tf_preprocessing import TfPreprocessTransform
transform = TfPreprocessTransform(is_training=is_training,
size=img_size,
interpolation=interpolation)
else:
if is_training:
transform = transforms_imagenet_train(
img_size,
scale=(min_crop_factor, 1),
color_jitter=color_jitter,
auto_augment=auto_augment,
interpolation=interpolation,
use_prefetcher=use_prefetcher,
mean=mean,
std=std,
re_prob=re_prob,
re_mode=re_mode,
re_count=re_count,
re_num_splits=re_num_splits,
separate=separate,
squish=squish,
do_8_rotations=do_8_rotations)
else:
assert not separate, "Separate transforms not supported for validation preprocessing"
transform = transforms_imagenet_eval(img_size,
interpolation=interpolation,
use_prefetcher=use_prefetcher,
mean=mean,
std=std,
crop_pct=crop_pct,
squish=squish)
return transform
def create_transform(
input_size,
is_training=False,
use_prefetcher=False,
color_jitter=0.4,
auto_augment=None,
interpolation='bilinear',
mean=IMAGENET_DEFAULT_MEAN,
std=IMAGENET_DEFAULT_STD,
crop_pct=None,
tf_preprocessing=False,
use_aug=False):
if isinstance(input_size, tuple):
img_size = input_size[-2:]
else:
img_size = input_size
if tf_preprocessing and use_prefetcher:
from timm.data.tf_preprocessing import TfPreprocessTransform
transform = TfPreprocessTransform(
is_training=is_training, size=img_size, interpolation=interpolation)
else:
if is_training:
transform = transforms_imagenet_train(
img_size,
color_jitter=color_jitter,
auto_augment=auto_augment,
interpolation=interpolation,
use_prefetcher=use_prefetcher,
mean=mean,
std=std,
use_aug=use_aug)
else:
transform = transforms_imagenet_eval(
img_size,
interpolation=interpolation,
use_prefetcher=use_prefetcher,
mean=mean,
std=std,
crop_pct=crop_pct)
return transform
def create_loader(
dataset,
input_size,
batch_size,
is_training=False,
use_prefetcher=True,
rand_erase_prob=0.,
rand_erase_mode='const',
interpolation='bilinear',
mean=IMAGENET_DEFAULT_MEAN,
std=IMAGENET_DEFAULT_STD,
num_workers=1,
distributed=False,
crop_pct=None,
collate_fn=None,
tf_preprocessing=False,
):
if isinstance(input_size, tuple):
img_size = input_size[-2:]
else:
img_size = input_size
if tf_preprocessing and use_prefetcher:
from timm.data.tf_preprocessing import TfPreprocessTransform
transform = TfPreprocessTransform(is_training=is_training,
size=img_size)
else:
if is_training:
transform = transforms_imagenet_train(
img_size,
interpolation=interpolation,
use_prefetcher=use_prefetcher,
mean=mean,
std=std)
else:
transform = transforms_imagenet_eval(img_size,
interpolation=interpolation,
use_prefetcher=use_prefetcher,
mean=mean,
std=std,
crop_pct=crop_pct)
dataset.transform = transform
sampler = None
if distributed:
if is_training:
sampler = torch.utils.data.distributed.DistributedSampler(dataset)
else:
# This will add extra duplicate entries to result in equal num
# of samples per-process, will slightly alter validation results
sampler = OrderedDistributedSampler(dataset)
if collate_fn is None:
collate_fn = fast_collate if use_prefetcher else torch.utils.data.dataloader.default_collate
loader = torch.utils.data.DataLoader(
dataset,
batch_size=batch_size,
shuffle=sampler is None and is_training,
num_workers=num_workers,
sampler=sampler,
collate_fn=collate_fn,
drop_last=is_training,
)
if use_prefetcher:
loader = PrefetchLoader(
loader,
rand_erase_prob=rand_erase_prob if is_training else 0.,
rand_erase_mode=rand_erase_mode,
mean=mean,
std=std)
return loader
def create_transform(input_size,
is_training=False,
use_prefetcher=False,
no_aug=False,
scale=None,
ratio=None,
hflip=0.5,
vflip=0.,
color_jitter=0.4,
auto_augment=None,
interpolation='bilinear',
mean=IMAGENET_DEFAULT_MEAN,
std=IMAGENET_DEFAULT_STD,
re_prob=0.,
re_mode='const',
re_count=1,
re_num_splits=0,
crop_pct=None,
tf_preprocessing=False,
separate=False):
if isinstance(input_size, (tuple, list)):
img_size = input_size[-2:]
else:
img_size = input_size
if tf_preprocessing and use_prefetcher:
assert not separate, "Separate transforms not supported for TF preprocessing"
from timm.data.tf_preprocessing import TfPreprocessTransform
transform = TfPreprocessTransform(is_training=is_training,
size=img_size,
interpolation=interpolation)
else:
if is_training and no_aug:
assert not separate, "Cannot perform split augmentation with no_aug"
transform = transforms_noaug_train(img_size,
interpolation=interpolation,
use_prefetcher=use_prefetcher,
mean=mean,
std=std)
elif is_training:
transform = transforms_imagenet_train(
img_size,
scale=scale,
ratio=ratio,
hflip=hflip,
vflip=vflip,
color_jitter=color_jitter,
auto_augment=auto_augment,
interpolation=interpolation,
use_prefetcher=use_prefetcher,
mean=mean,
std=std,
re_prob=re_prob,
re_mode=re_mode,
re_count=re_count,
re_num_splits=re_num_splits,
separate=separate)
else:
assert not separate, "Separate transforms not supported for validation preprocessing"
transform = transforms_imagenet_eval(img_size,
interpolation=interpolation,
use_prefetcher=use_prefetcher,
mean=mean,
std=std,
crop_pct=crop_pct)
return transform
