def _validate(self, data_loader, epoch):
self.meters.reset()
self.model.eval()
for idx, (inp, gt) in enumerate(data_loader):
timer = time.time()
inp, gt = self._batch_prehandle(inp, gt)
if len(gt) > 1 and idx == 0:
self._data_err()
resulter, debugger = self.model.forward(inp, gt, False)
pred = tool.dict_value(resulter, 'pred')
activated_pred = tool.dict_value(resulter, 'activated_pred')
task_loss = tool.dict_value(resulter, 'task_loss', err=True)
task_loss = task_loss.mean()
self.meters.update('task_loss', task_loss.data)
self.task_func.metrics(activated_pred,
gt,
inp,
self.meters,
id_str='task')
self.meters.update('batch_time', time.time() - timer)
if idx % self.args.log_freq == 0:
logger.log_info(
'step: [{0}][{1}/{2}]\tbatch-time: {meters[batch_time]:.3f}\n'
' task-{3}\t=>\t'
'task-loss: {meters[task_loss]:.6f}\t'.format(
epoch + 1,
idx,
len(data_loader),
self.args.task,
meters=self.meters))
# visualization
if self.args.visualize and idx % self.args.visual_freq == 0:
self._visualize(
epoch, idx, False,
func.split_tensor_tuple(inp, 0, 1, reduce_dim=True),
func.split_tensor_tuple(activated_pred,
0,
1,
reduce_dim=True),
func.split_tensor_tuple(gt, 0, 1, reduce_dim=True))
# metrics
metrics_info = {'task': ''}
for key in sorted(list(self.meters.keys())):
if self.task_func.METRIC_STR in key:
for id_str in metrics_info.keys():
if key.startswith(id_str):
metrics_info[id_str] += '{0}: {1:.6}\t'.format(
key, self.meters[key])
logger.log_info('Validation metrics:\n task-metrics\t=>\t{0}\n'.format(
metrics_info['task'].replace('_', '-')))
def _build_ssl_algorithm(self):
""" Build the semi-supervised learning algorithm given in the script.
"""
for cname in self.args.models.keys():
self.model_dict[cname] = self.model.__dict__[
self.args.models[cname]]()
self.criterion_dict[cname] = self.criterion.__dict__[
self.args.criterions[cname]]()
self.lrer_dict[cname] = nnlrer.__dict__[self.args.lrers[cname]](
self.args)
self.optimizer_dict[cname] = nnoptimizer.__dict__[
self.args.optimizers[cname]](self.args)
logger.log_info('SSL algorithm: \n {0}\n'.format(
self.args.ssl_algorithm))
logger.log_info('Models: ')
self.ssl_algorithm = pixelssl.ssl_algorithm.__dict__[
self.args.ssl_algorithm].__dict__[self.args.ssl_algorithm](
self.args, self.model_dict,
self.optimizer_dict, self.lrer_dict, self.criterion_dict,
self.func.task_func()(self.args))
# check whether the SSL algorithm supports the given task
if not self.TASK_TYPE in self.ssl_algorithm.SUPPORTED_TASK_TYPES:
logger.log_err(
'SSL algorithm - {0} - supports task types {1}\n'
'However, the given task - {2} - belongs to {3}\n'.format(
self.ssl_algorithm.NAME,
self.ssl_algorithm.SUPPORTED_TASK_TYPES, self.args.task,
self.TASK_TYPE))
def create_model(mclass, mname, **kwargs):
""" Create a nn.Module and setup it on multiple GPUs.
"""
model = mclass(**kwargs)
model = torch.nn.DataParallel(model)
model = model.cuda()
logger.log_info(' ' + '=' * 76 +
'\n {0} parameters \n{1}'.format(mname, model_str(model)))
return model
def _build(self, model_funcs, optimizer_funcs, lrer_funcs, criterion_funcs,
task_func):
self.task_func = task_func
# create models
self.task_model = func.create_model(model_funcs[0],
'task_model',
args=self.args).module
self.rotation_classifier = RotationClassifer(
self.task_func.ssls4l_rc_in_channels())
# wrap 'self.task_model' and 'self.rotation_classifier' into a single model
self.model = WrappedS4LModel(self.args, self.task_model,
self.rotation_classifier)
self.model = nn.DataParallel(self.model).cuda()
# call 'patch_replication_callback' to use the `sync_batchnorm` layer
patch_replication_callback(self.model)
self.models = {'model': self.model}
# create optimizers
self.optimizer = optimizer_funcs[0](self.model.module.param_groups)
self.optimizers = {'optimizer': self.optimizer}
# create lrers
self.lrer = lrer_funcs[0](self.optimizer)
self.lrers = {'lrer': self.lrer}
# create criterions
self.criterion = criterion_funcs[0](self.args)
self.rotation_criterion = nn.CrossEntropyLoss()
self.criterions = {
'criterion': self.criterion,
'rotation_criterion': self.rotation_criterion
}
# the batch size is doubled in S4L since it creates an extra rotated sample for each sample
self.args.batch_size *= 2
self.args.labeled_batch_size *= 2
self.args.unlabeled_batch_size *= 2
logger.log_info('In SSL_S4L algorithm, batch size are doubled: \n'
' Total labeled batch size: {1}\n'
' Total unlabeled batch size: {2}\n'.format(
self.args.lr, self.args.labeled_batch_size,
self.args.unlabeled_batch_size))
self._algorithm_warn()
def _train(self, data_loader, epoch):
# disable unlabeled data
without_unlabeled_data = self.args.ignore_unlabeled and self.args.unlabeled_batch_size == 0
if not without_unlabeled_data:
logger.log_err(
'SSL_NULL is a supervised-only algorithm\n'
'Please set ignore_unlabeled = True and unlabeled_batch_size = 0\n'
)
self.meters.reset()
lbs = self.args.labeled_batch_size
self.model.train()
for idx, (inp, gt) in enumerate(data_loader):
timer = time.time()
# both 'inp' and 'gt' are tuples
inp, gt = self._batch_prehandle(inp, gt)
if len(gt) > 1 and idx == 0:
self._inp_warn()
self.optimizer.zero_grad()
# forward the task model
resulter, debugger = self.model.forward(inp)
if not 'pred' in resulter.keys(
) or not 'activated_pred' in resulter.keys():
self._pred_err()
pred = tool.dict_value(resulter, 'pred')
activated_pred = tool.dict_value(resulter, 'activated_pred')
# calculate the supervised task constraint on the labeled data
l_pred = func.split_tensor_tuple(pred, 0, lbs)
l_gt = func.split_tensor_tuple(gt, 0, lbs)
l_inp = func.split_tensor_tuple(inp, 0, lbs)
# 'task_loss' is a tensor of 1-dim & n elements, where n == batch_size
task_loss = self.criterion.forward(l_pred, l_gt, l_inp)
task_loss = torch.mean(task_loss)
self.meters.update('task_loss', task_loss.data)
# backward and update the task model
loss = task_loss
loss.backward()
self.optimizer.step()
# logging
self.meters.update('batch_time', time.time() - timer)
if idx % self.args.log_freq == 0:
logger.log_info(
'step: [{0}][{1}/{2}]\tbatch-time: {meters[batch_time]:.3f}\n'
' task-{3}\t=>\t'
'task-loss: {meters[task_loss]:.6f}\t'.format(
epoch,
idx,
len(data_loader),
self.args.task,
meters=self.meters))
# visualization
if self.args.visualize and idx % self.args.visual_freq == 0:
self._visualize(
epoch, idx, True,
func.split_tensor_tuple(inp, 0, 1, reduce_dim=True),
func.split_tensor_tuple(activated_pred,
0,
1,
reduce_dim=True),
func.split_tensor_tuple(gt, 0, 1, reduce_dim=True))
# update iteration-based lrers
if not self.args.is_epoch_lrer:
self.lrer.step()
# update epoch-based lrers
if self.args.is_epoch_lrer:
self.lrer.step()
def _train(self, data_loader, epoch):
self.meters.reset()
lbs = self.args.labeled_batch_size
self.model.train()
for idx, (inp, gt) in enumerate(data_loader):
timer = time.time()
inp, gt = self._batch_prehandle(inp, gt)
if len(gt) > 1 and idx == 0:
self._data_err()
# TODO: support more ramp-up functions
# calculate the ramp-up coefficient of the consistency constraint
cur_step = len(data_loader) * epoch + idx
total_steps = len(data_loader) * self.args.cons_rampup_epochs
cons_rampup_scale = func.sigmoid_rampup(cur_step, total_steps)
self.optimizer.zero_grad()
# -----------------------------------------------------------
# For Labeled Data
# -----------------------------------------------------------
l_gt = func.split_tensor_tuple(gt, 0, lbs)
l_inp = func.split_tensor_tuple(inp, 0, lbs)
# forward the wrapped CCT model
resulter, debugger = self.model.forward(l_inp, l_gt, False)
l_pred = tool.dict_value(resulter, 'pred')
l_activated_pred = tool.dict_value(resulter, 'activated_pred')
task_loss = tool.dict_value(resulter, 'task_loss', err=True)
task_loss = task_loss.mean()
self.meters.update('task_loss', task_loss.data)
# -----------------------------------------------------------
# For Unlabeled Data
# -----------------------------------------------------------
if self.args.unlabeled_batch_size > 0:
ul_gt = func.split_tensor_tuple(gt, lbs, self.args.batch_size)
ul_inp = func.split_tensor_tuple(inp, lbs, self.args.batch_size)
# forward the wrapped CCT model
resulter, debugger = self.model.forward(ul_inp, ul_gt, True)
ul_pred = tool.dict_value(resulter, 'pred')
ul_activated_pred = tool.dict_value(resulter, 'activated_pred')
ul_ad_preds = tool.dict_value(resulter, 'ul_ad_preds')
cons_loss = tool.dict_value(resulter, 'cons_loss', err=True)
cons_loss = cons_loss.mean()
cons_loss = cons_rampup_scale * self.args.cons_scale * cons_loss
self.meters.update('cons_loss', cons_loss.data)
else:
cons_loss = 0
self.meters.update('cons_loss', cons_loss)
# backward and update the wrapped CCT model
loss = task_loss + cons_loss
loss.backward()
self.optimizer.step()
# logging
self.meters.update('batch_time', time.time() - timer)
if idx % self.args.log_freq == 0:
logger.log_info('step: [{0}][{1}/{2}]\tbatch-time: {meters[batch_time]:.3f}\n'
' task-{3}\t=>\t'
'task-loss: {meters[task_loss]:.6f}\t'
'cons-loss: {meters[cons_loss]:.6f}\n'
.format(epoch, idx, len(data_loader), self.args.task, meters=self.meters))
# visualization
if self.args.visualize and idx % self.args.visual_freq == 0:
self._visualize(epoch, idx, True,
func.split_tensor_tuple(inp, 0, 1, reduce_dim=True),
func.split_tensor_tuple(activated_pred, 0, 1, reduce_dim=True),
func.split_tensor_tuple(gt, 0, 1, reduce_dim=True))
# update iteration-based lrers
if not self.args.is_epoch_lrer:
self.lrer.step()
# update epoch-based lrers
if self.args.is_epoch_lrer:
self.lrer.step()
def _validate(self, data_loader, epoch):
self.meters.reset()
self.s_model.eval()
self.t_model.eval()
for idx, (inp, gt) in enumerate(data_loader):
timer = time.time()
inp, gt, _, _ = self._batch_prehandle(inp, gt, False)
if len(inp) > 1 and idx == 0:
self._inp_warn()
if len(gt) > 1 and idx == 0:
self._gt_warn()
s_resulter, s_debugger = self.s_model.forward(inp)
if not 'pred' in s_resulter.keys(
) or not 'activated_pred' in s_resulter.keys():
self._pred_err()
s_pred = tool.dict_value(s_resulter, 'pred')
s_activated_pred = tool.dict_value(s_resulter, 'activated_pred')
s_task_loss = self.s_criterion.forward(s_pred, gt, inp)
s_task_loss = torch.mean(s_task_loss)
self.meters.update('s_task_loss', s_task_loss.data)
t_resulter, t_debugger = self.t_model.forward(inp)
if not 'pred' in t_resulter.keys(
) or not 'activated_pred' in t_resulter.keys():
self._pred_err()
t_pred = tool.dict_value(t_resulter, 'pred')
t_activated_pred = tool.dict_value(t_resulter, 'activated_pred')
t_task_loss = self.s_criterion.forward(t_pred, gt, inp)
t_task_loss = torch.mean(t_task_loss)
self.meters.update('t_task_loss', t_task_loss.data)
t_pseudo_gt = []
for tap in t_activated_pred:
t_pseudo_gt.append(tap.detach())
t_pseudo_gt = tuple(t_pseudo_gt)
cons_loss = 0
for sap, tpg in zip(s_activated_pred, t_pseudo_gt):
cons_loss += torch.mean(self.cons_criterion(sap, tpg))
cons_loss = self.args.cons_scale * torch.mean(cons_loss)
self.meters.update('cons_loss', cons_loss.data)
self.task_func.metrics(s_activated_pred,
gt,
inp,
self.meters,
id_str='student')
self.task_func.metrics(t_activated_pred,
gt,
inp,
self.meters,
id_str='teacher')
self.meters.update('batch_time', time.time() - timer)
if idx % self.args.log_freq == 0:
logger.log_info(
'step: [{0}][{1}/{2}]\tbatch-time: {meters[batch_time]:.3f}\n'
' student-{3}\t=>\t'
's-task-loss: {meters[s_task_loss]:.6f}\t'
's-cons-loss: {meters[cons_loss]:.6f}\n'
' teacher-{3}\t=>\t'
't-task-loss: {meters[t_task_loss]:.6f}\n'.format(
epoch + 1,
idx,
len(data_loader),
self.args.task,
meters=self.meters))
# visualization
if self.args.visualize and idx % self.args.visual_freq == 0:
self._visualize(
epoch, idx, False,
func.split_tensor_tuple(inp, 0, 1, reduce_dim=True),
func.split_tensor_tuple(s_activated_pred,
0,
1,
reduce_dim=True),
func.split_tensor_tuple(gt, 0, 1, reduce_dim=True))
# metrics
metrics_info = {'student': '', 'teacher': ''}
for key in sorted(list(self.meters.keys())):
if self.task_func.METRIC_STR in key:
for id_str in metrics_info.keys():
if key.startswith(id_str):
metrics_info[id_str] += '{0}: {1:.6}\t'.format(
key, self.meters[key])
logger.log_info(
'Validation metrics:\n student-metrics\t=>\t{0}\n teacher-metrics\t=>\t{1}\n'
.format(metrics_info['student'].replace('_', '-'),
metrics_info['teacher'].replace('_', '-')))
def _train(self, data_loader, epoch):
self.meters.reset()
lbs = self.args.labeled_batch_size
ubs = self.args.unlabeled_batch_size
self.s_model.train()
self.t_model.train()
for idx, (inp, gt) in enumerate(data_loader):
timer = time.time()
# 'inp' and 'gt' are tuples
inp, gt, mix_u_inp, mix_u_mask = self._batch_prehandle(
inp, gt, True)
if len(inp) > 1 and idx == 0:
self._inp_warn()
if len(gt) > 1 and idx == 0:
self._gt_warn()
# calculate the ramp-up coefficient of the consistency constraint
cur_step = len(data_loader) * epoch + idx
total_steps = len(data_loader) * self.args.cons_rampup_epochs
cons_rampup_scale = func.sigmoid_rampup(cur_step, total_steps)
self.s_optimizer.zero_grad()
# -------------------------------------------------
# For Labeled Samples
# -------------------------------------------------
l_inp = func.split_tensor_tuple(inp, 0, lbs)
l_gt = func.split_tensor_tuple(gt, 0, lbs)
# forward the labeled samples by the student model
l_s_resulter, l_s_debugger = self.s_model.forward(l_inp)
if not 'pred' in l_s_resulter.keys(
) or not 'activated_pred' in l_s_resulter.keys():
self._pred_err()
l_s_pred = tool.dict_value(l_s_resulter, 'pred')
l_s_activated_pred = tool.dict_value(l_s_resulter,
'activated_pred')
# calculate the supervised task loss on the labeled samples
task_loss = self.s_criterion.forward(l_s_pred, l_gt, l_inp)
task_loss = torch.mean(task_loss)
self.meters.update('task_loss', task_loss.data)
# -------------------------------------------------
# For Unlabeled Samples
# -------------------------------------------------
if self.args.unlabeled_batch_size > 0:
u_inp = func.split_tensor_tuple(inp, lbs, self.args.batch_size)
# forward the original samples by the teacher model
with torch.no_grad():
u_t_resulter, u_t_debugger = self.t_model.forward(u_inp)
if not 'pred' in u_t_resulter.keys(
) or not 'activated_pred' in u_t_resulter.keys():
self._pred_err()
u_t_activated_pred = tool.dict_value(u_t_resulter,
'activated_pred')
# mix the activated pred from the teacher model as the pseudo gt
u_t_activated_pred_1 = func.split_tensor_tuple(
u_t_activated_pred, 0, int(ubs / 2))
u_t_activated_pred_2 = func.split_tensor_tuple(
u_t_activated_pred, int(ubs / 2), ubs)
mix_u_t_activated_pred = []
mix_u_t_confidence = []
for up_1, up_2 in zip(u_t_activated_pred_1,
u_t_activated_pred_2):
mp = mix_u_mask * up_1 + (1 - mix_u_mask) * up_2
mix_u_t_activated_pred.append(mp.detach())
# NOTE: here we just follow the official code of CutMix to calculate the confidence
# but it is odd that all the samples use the same confidence (mean confidence)
u_t_confidence = (mp.max(dim=1)[0] >
self.args.cons_threshold).float().mean()
mix_u_t_confidence.append(u_t_confidence.detach())
mix_u_t_activated_pred = tuple(mix_u_t_activated_pred)
# forward the mixed samples by the student model
u_s_resulter, u_s_debugger = self.s_model.forward(mix_u_inp)
if not 'pred' in u_s_resulter.keys(
) or not 'activated_pred' in u_s_resulter.keys():
self._pred_err()
mix_u_s_activated_pred = tool.dict_value(
u_s_resulter, 'activated_pred')
# calculate the consistency constraint
cons_loss = 0
for msap, mtap, confidence in zip(mix_u_s_activated_pred,
mix_u_t_activated_pred,
mix_u_t_confidence):
cons_loss += torch.mean(self.cons_criterion(
msap, mtap)) * confidence
cons_loss = cons_rampup_scale * self.args.cons_scale * torch.mean(
cons_loss)
self.meters.update('cons_loss', cons_loss.data)
else:
cons_loss = 0
self.meters.update('cons_loss', cons_loss)
# backward and update the student model
loss = task_loss + cons_loss
loss.backward()
self.s_optimizer.step()
# update the teacher model by EMA
self._update_ema_variables(self.s_model, self.t_model,
self.args.ema_decay, cur_step)
# logging
self.meters.update('batch_time', time.time() - timer)
if idx % self.args.log_freq == 0:
logger.log_info(
'step: [{0}][{1}/{2}]\tbatch-time: {meters[batch_time]:.3f}\n'
' student-{3}\t=>\t'
's-task-loss: {meters[task_loss]:.6f}\t'
's-cons-loss: {meters[cons_loss]:.6f}\n'.format(
epoch + 1,
idx,
len(data_loader),
self.args.task,
meters=self.meters))
# visualization
if self.args.visualize and idx % self.args.visual_freq == 0:
self._visualize(
epoch, idx, True,
func.split_tensor_tuple(l_inp, 0, 1, reduce_dim=True),
func.split_tensor_tuple(l_s_activated_pred,
0,
1,
reduce_dim=True),
func.split_tensor_tuple(l_gt, 0, 1, reduce_dim=True),
func.split_tensor_tuple(mix_u_inp, 0, 1, reduce_dim=True),
func.split_tensor_tuple(mix_u_s_activated_pred,
0,
1,
reduce_dim=True),
func.split_tensor_tuple(mix_u_t_activated_pred,
0,
1,
reduce_dim=True), mix_u_mask[0])
# update iteration-based lrers
if not self.args.is_epoch_lrer:
self.s_lrer.step()
# update epoch-based lrers
if self.args.is_epoch_lrer:
self.s_lrer.step()
def _create_dataloader(self):
""" Create data loaders for experiment.
"""
# ---------------------------------------------------------------------
# create dataloder for training
# ---------------------------------------------------------------------
# ignore_unlabeled == False & unlabeled_batch_size != 0
# means that both labeled and unlabeled data are used
with_unlabeled_data = not self.args.ignore_unlabeled and self.args.unlabeled_batch_size != 0
# ignore_unlabeled == True & unlabeled_batch_size == 0
# means that only the labeled data is used
without_unlabeled_data = self.args.ignore_unlabeled and self.args.unlabeled_batch_size == 0
labeled_train_samples, unlabeled_train_samples = 0, 0
if not self.args.validation:
# ignore_unlabeled == True & unlabeled_batch_size != 0 -> error
if self.args.ignore_unlabeled and self.args.unlabeled_batch_size != 0:
logger.log_err(
'Arguments conflict => ignore_unlabeled == True requires unlabeled_batch_size == 0\n'
)
# ignore_unlabeled == False & unlabeled_batch_size == 0 -> error
if not self.args.ignore_unlabeled and self.args.unlabeled_batch_size == 0:
logger.log_err(
'Arguments conflict => ignore_unlabeled == False requires unlabeled_batch_size != 0\n'
)
# calculate the number of trainsets
trainset_num = 0
for key, value in self.args.trainset.items():
trainset_num += len(value)
# calculate the number of unlabeledsets
unlabeledset_num = 0
for key, value in self.args.unlabeledset.items():
unlabeledset_num += len(value)
# if only one labeled training set and without any unlabeled set
if trainset_num == 1 and unlabeledset_num == 0:
trainset = self._load_dataset(
list(self.args.trainset.keys())[0],
list(self.args.trainset.values())[0][0])
labeled_train_samples = len(trainset.idxs)
# if the 'sublabeled_path' is given
sublabeled_prefix = None
if self.args.sublabeled_path is not None and self.args.sublabeled_path != '':
if not os.path.exists(self.args.sublabeled_path):
logger.log_err(
'Cannot find labeled file: {0}\n'.format(
self.args.sublabeled_path))
else:
with open(self.args.sublabeled_path) as f:
sublabeled_prefix = [
line.strip() for line in f.read().splitlines()
]
sublabeled_prefix = None if len(
sublabeled_prefix) == 0 else sublabeled_prefix
if sublabeled_prefix is not None:
# wrap the trainset by 'SplitUnlabeledWrapper'
trainset = nndata.SplitUnlabeledWrapper(
trainset,
sublabeled_prefix,
ignore_unlabeled=self.args.ignore_unlabeled)
labeled_train_samples = len(trainset.labeled_idxs)
unlabeled_train_samples = len(trainset.unlabeled_idxs)
# if 'sublabeled_prefix' is None but you want to use the unlabeled data for training
elif with_unlabeled_data:
logger.log_err(
'Try to use the unlabeled samples without any SSL dataset wrapper\n'
)
# if more than one labeled training sets are given or the unlabeled training sets are given
elif trainset_num > 1 or unlabeledset_num > 0:
# 'arg.sublabeled_path' is disabled
if self.args.sublabeled_path is not None and self.args.sublabeled_path != '':
logger.log_err(
'Multiple training datasets are given. \n'
'Inter-split unlabeled set is not allowed.\n'
'Please remove the argument \'sublabeled_path\' in the script\n'
)
# load all training sets
labeled_sets = []
for set_name, set_dirs in self.args.trainset.items():
for set_dir in set_dirs:
labeled_sets.append(
self._load_dataset(set_name, set_dir))
# load all extra unlabeled sets
unlabeled_sets = []
# if any extra unlabeled set is given
if unlabeledset_num > 0:
for set_name, set_dirs in self.args.unlabeledset.items():
for set_dir in set_dirs:
unlabeled_sets.append(
self._load_dataset(set_name, set_dir))
# if unalbeledset_num == 0 but you want to use the unlabeled data for training
elif with_unlabeled_data:
logger.log_err(
'Try to use the unlabeled samples without any SSL dataset wrapper\n'
'Please add the argument \'unlabeledset\' in the script\n'
)
# wrap both 'labeled_set' and 'unlabeled_set' by 'JointDatasetsWrapper'
trainset = nndata.JointDatasetsWrapper(
labeled_sets,
unlabeled_sets,
ignore_unlabeled=self.args.ignore_unlabeled)
labeled_train_samples = len(trainset.labeled_idxs)
unlabeled_train_samples = len(trainset.unlabeled_idxs)
# if use labeled data only
if without_unlabeled_data:
self.train_loader = torch.utils.data.DataLoader(
trainset,
batch_size=self.args.batch_size,
shuffle=True,
num_workers=self.args.num_workers,
pin_memory=True,
drop_last=True)
# if use both labeled and unlabeled data
elif with_unlabeled_data:
train_sampler = nndata.TwoStreamBatchSampler(
trainset.labeled_idxs, trainset.unlabeled_idxs,
self.args.labeled_batch_size,
self.args.unlabeled_batch_size)
self.train_loader = torch.utils.data.DataLoader(
trainset,
batch_sampler=train_sampler,
num_workers=self.args.num_workers,
pin_memory=True)
# ---------------------------------------------------------------------
# create dataloader for validation
# ---------------------------------------------------------------------
# calculate the number of valsets
valset_num = 0
for key, value in self.args.valset.items():
valset_num += len(value)
# if only one validation set is given
if valset_num == 1:
valset = self._load_dataset(list(self.args.valset.keys())[0],
list(self.args.valset.values())[0][0],
is_train=False)
val_samples = len(valset.idxs)
# if more than one validation sets are given
elif valset_num > 1:
valsets = []
for set_name, set_dirs in self.args.valset.items():
for set_dir in set_dirs:
valsets.append(
self._load_dataset(set_name, set_dir, is_train=False))
valset = nndata.JointDatasetsWrapper(valsets, [],
ignore_unlabeled=True)
val_samples = len(valset.labeled_idxs)
# NOTE: batch size is set to 1 during the validation
self.val_loader = torch.utils.data.DataLoader(
valset,
batch_size=1,
shuffle=False,
num_workers=self.args.num_workers,
pin_memory=True)
# check the data loaders
if self.train_loader is None and not self.args.validation:
logger.log_err(
'Train data loader is required if validate mode is closed\n')
elif self.val_loader is None and self.args.validation:
logger.log_err(
'Validate data loader is required if validate mode is opened\n'
)
elif self.val_loader is None:
logger.log_warn(
'No validate data loader, there are no validation during the training\n'
)
# set 'iters_per_epoch', which is required by ITER_LRERS
self.args.iters_per_epoch = len(
self.train_loader) if self.train_loader is not None else -1
logger.log_info(
'Dataset:\n'
' Trainset\t=>\tlabeled samples = {0}\t\tunlabeled samples = {1}\n'
' Valset\t=>\tsamples = {2}\n'.format(labeled_train_samples,
unlabeled_train_samples,
val_samples))
def _run(self):
""" Main pipeline of experiment.
Please override this function if you want a special pipeline.
"""
start_epoch = 0
if self.args.resume is not None and self.args.resume != '':
logger.log_info('Load checkpoint from: {0}'.format(
self.args.resume))
start_epoch = self.ssl_algorithm.load_checkpoint()
if self.args.validation:
if self.val_loader is None:
logger.log_err('No data loader for validation.\n'
'Please set right \'valset\' in the script.\n')
logger.log_info(
['=' * 78, '\nStart to validate model\n', '=' * 78])
with torch.no_grad():
self.ssl_algorithm.validate(self.val_loader, start_epoch - 1)
return
for epoch in range(start_epoch, self.args.epochs):
timer = time.time()
logger.log_info([
'=' * 78, '\nStart to train epoch-{0}\n'.format(epoch),
'=' * 78
])
self.ssl_algorithm.train(self.train_loader, epoch)
if epoch % self.args.val_freq == 0 and self.val_loader is not None:
logger.log_info([
'=' * 78, '\nStart to validate epoch-{0}\n'.format(epoch),
'=' * 78
])
with torch.no_grad():
self.ssl_algorithm.validate(self.val_loader, epoch)
if (epoch + 1) % self.args.checkpoint_freq == 0:
self.ssl_algorithm.save_checkpoint(epoch + 1)
logger.log_info("Save checkpoint for epoch {0}".format(epoch))
logger.log_info(
'Finish epoch in {0} seconds\n'.format(time.time() - timer))
logger.log_info('Finish experiment {0}\n'.format(self.args.exp_id))
def _validate(self, data_loader, epoch):
self.meters.reset()
self.model.eval()
self.d_model.eval()
for idx, (inp, gt) in enumerate(data_loader):
timer = time.time()
inp, gt = self._batch_prehandle(inp, gt)
if len(gt) > 1 and idx == 0:
self._inp_warn()
resulter, debugger = self.model.forward(inp)
if not 'pred' in resulter.keys(
) or not 'activated_pred' in resulter.keys():
self._pred_err()
pred = tool.dict_value(resulter, 'pred')
activated_pred = tool.dict_value(resulter, 'activated_pred')
task_loss = self.criterion.forward(pred, gt, inp)
task_loss = torch.mean(task_loss)
self.meters.update('task_loss', task_loss.data)
d_resulter, d_debugger = self.d_model.forward(activated_pred[0])
unhandled_fake_confidence_map = tool.dict_value(
d_resulter, 'confidence')
fake_confidence_map, fake_confidence_gt = \
self.task_func.ssladv_preprocess_fcd_criterion(unhandled_fake_confidence_map, gt[0], False)
fake_d_loss = self.d_criterion.forward(fake_confidence_map,
fake_confidence_gt)
fake_d_loss = self.args.discriminator_scale * torch.mean(
fake_d_loss)
self.meters.update('fake_d_loss', fake_d_loss.data)
real_gt = self.task_func.ssladv_convert_task_gt_to_fcd_input(gt[0])
d_resulter, d_debugger = self.d_model.forward(real_gt)
unhandled_real_confidence_map = tool.dict_value(
d_resulter, 'confidence')
real_confidence_map, real_confidence_gt = \
self.task_func.ssladv_preprocess_fcd_criterion(unhandled_real_confidence_map, gt[0], True)
real_d_loss = self.d_criterion.forward(real_confidence_map,
real_confidence_gt)
real_d_loss = self.args.discriminator_scale * torch.mean(
real_d_loss)
self.meters.update('real_d_loss', real_d_loss.data)
self.task_func.metrics(activated_pred,
gt,
inp,
self.meters,
id_str='task')
self.meters.update('batch_time', time.time() - timer)
if idx % self.args.log_freq == 0:
logger.log_info(
'step: [{0}][{1}/{2}]\tbatch-time: {meters[batch_time]:.3f}\n'
' task-{3}\t=>\t'
'task-loss: {meters[task_loss]:.6f}\t'
' fc-discriminator\t=>\t'
'fake-d-loss: {meters[fake_d_loss]:.6f}\t'
'real-d-loss: {meters[real_d_loss]:.6f}\n'.format(
epoch + 1,
idx,
len(data_loader),
self.args.task,
meters=self.meters))
if self.args.visualize and idx % self.args.visual_freq == 0:
self._visualize(
epoch, idx, False,
func.split_tensor_tuple(inp, 0, 1, reduce_dim=True),
func.split_tensor_tuple(activated_pred,
0,
1,
reduce_dim=True),
func.split_tensor_tuple(gt, 0, 1, reduce_dim=True),
torch.sigmoid(unhandled_fake_confidence_map[0]))
# metrics
metrics_info = {'task': ''}
for key in sorted(list(self.meters.keys())):
if self.task_func.METRIC_STR in key:
for id_str in metrics_info.keys():
if key.startswith(id_str):
metrics_info[id_str] += '{0}: {1:.6}\t'.format(
key, self.meters[key])
logger.log_info('Validation metrics:\n task-metrics\t=>\t{0}\n'.format(
metrics_info['task'].replace('_', '-')))
def _train(self, data_loader, epoch):
self.meters.reset()
lbs = self.args.labeled_batch_size
self.model.train()
self.d_model.train()
# both 'inp' and 'gt' are tuples
for idx, (inp, gt) in enumerate(data_loader):
timer = time.time()
inp, gt = self._batch_prehandle(inp, gt)
if len(gt) > 1 and idx == 0:
self._inp_warn()
# -----------------------------------------------------------------------------
# step-1: train the task model
# -----------------------------------------------------------------------------
self.optimizer.zero_grad()
# forward the task model
resulter, debugger = self.model.forward(inp)
if not 'pred' in resulter.keys(
) or not 'activated_pred' in resulter.keys():
self._pred_err()
pred = tool.dict_value(resulter, 'pred')
activated_pred = tool.dict_value(resulter, 'activated_pred')
# forward the FC discriminator
# 'confidence_map' is a tensor
d_resulter, d_debugger = self.d_model.forward(activated_pred[0])
confidence_map = tool.dict_value(d_resulter, 'confidence')
# calculate the supervised task constraint on the labeled data
l_pred = func.split_tensor_tuple(pred, 0, lbs)
l_gt = func.split_tensor_tuple(gt, 0, lbs)
l_inp = func.split_tensor_tuple(inp, 0, lbs)
# 'task_loss' is a tensor of 1-dim & n elements, where n == batch_size
task_loss = self.criterion.forward(l_pred, l_gt, l_inp)
task_loss = torch.mean(task_loss)
self.meters.update('task_loss', task_loss.data)
# calculate the adversarial constraint
# calculate the adversarial constraint for the labeled data
if self.args.adv_for_labeled:
l_confidence_map = confidence_map[:lbs, ...]
# preprocess prediction and ground truch for the adversarial constraint
l_adv_confidence_map, l_adv_confidence_gt = \
self.task_func.ssladv_preprocess_fcd_criterion(l_confidence_map, l_gt[0], True)
l_adv_loss = self.d_criterion(l_adv_confidence_map,
l_adv_confidence_gt)
labeled_adv_loss = self.args.labeled_adv_scale * torch.mean(
l_adv_loss)
self.meters.update('labeled_adv_loss', labeled_adv_loss.data)
else:
labeled_adv_loss = 0
self.meters.update('labeled_adv_loss', labeled_adv_loss)
# calculate the adversarial constraint for the unlabeled data
if self.args.unlabeled_batch_size > 0:
u_confidence_map = confidence_map[lbs:self.args.batch_size,
...]
# preprocess prediction and ground truch for the adversarial constraint
u_adv_confidence_map, u_adv_confidence_gt = \
self.task_func.ssladv_preprocess_fcd_criterion(u_confidence_map, None, True)
u_adv_loss = self.d_criterion(u_adv_confidence_map,
u_adv_confidence_gt)
unlabeled_adv_loss = self.args.unlabeled_adv_scale * torch.mean(
u_adv_loss)
self.meters.update('unlabeled_adv_loss',
unlabeled_adv_loss.data)
else:
unlabeled_adv_loss = 0
self.meters.update('unlabeled_adv_loss', unlabeled_adv_loss)
adv_loss = labeled_adv_loss + unlabeled_adv_loss
# backward and update the task model
loss = task_loss + adv_loss
loss.backward()
self.optimizer.step()
# -----------------------------------------------------------------------------
# step-2: train the FC discriminator
# -----------------------------------------------------------------------------
self.d_optimizer.zero_grad()
# forward the task prediction (fake)
if self.args.unlabeled_for_discriminator:
fake_pred = activated_pred[0].detach()
else:
fake_pred = activated_pred[0][:lbs, ...].detach()
d_resulter, d_debugger = self.d_model.forward(fake_pred)
fake_confidence_map = tool.dict_value(d_resulter, 'confidence')
l_fake_confidence_map = fake_confidence_map[:lbs, ...]
l_fake_confidence_map, l_fake_confidence_gt = \
self.task_func.ssladv_preprocess_fcd_criterion(l_fake_confidence_map, l_gt[0], False)
if self.args.unlabeled_for_discriminator and self.args.unlabeled_batch_size != 0:
u_fake_confidence_map = fake_confidence_map[
lbs:self.args.batch_size, ...]
u_fake_confidence_map, u_fake_confidence_gt = \
self.task_func.ssladv_preprocess_fcd_criterion(u_fake_confidence_map, None, False)
fake_confidence_map = torch.cat(
(l_fake_confidence_map, u_fake_confidence_map), dim=0)
fake_confidence_gt = torch.cat(
(l_fake_confidence_gt, u_fake_confidence_gt), dim=0)
else:
fake_confidence_map, fake_confidence_gt = l_fake_confidence_map, l_fake_confidence_gt
fake_d_loss = self.d_criterion.forward(fake_confidence_map,
fake_confidence_gt)
fake_d_loss = self.args.discriminator_scale * torch.mean(
fake_d_loss)
self.meters.update('fake_d_loss', fake_d_loss.data)
# forward the ground truth (real)
# convert the format of ground truch
real_gt = self.task_func.ssladv_convert_task_gt_to_fcd_input(
l_gt[0])
d_resulter, d_debugger = self.d_model.forward(real_gt)
real_confidence_map = tool.dict_value(d_resulter, 'confidence')
real_confidence_map, real_confidence_gt = \
self.task_func.ssladv_preprocess_fcd_criterion(real_confidence_map, l_gt[0], True)
real_d_loss = self.d_criterion(real_confidence_map,
real_confidence_gt)
real_d_loss = self.args.discriminator_scale * torch.mean(
real_d_loss)
self.meters.update('real_d_loss', real_d_loss.data)
# backward and update the FC discriminator
d_loss = (fake_d_loss + real_d_loss) / 2
d_loss.backward()
self.d_optimizer.step()
# logging
self.meters.update('batch_time', time.time() - timer)
if idx % self.args.log_freq == 0:
logger.log_info(
'step: [{0}][{1}/{2}]\tbatch-time: {meters[batch_time]:.3f}\n'
' task-{3}\t=>\t'
'task-loss: {meters[task_loss]:.6f}\t'
'labeled-adv-loss: {meters[labeled_adv_loss]:.6f}\t'
'unlabeled-adv-loss: {meters[unlabeled_adv_loss]:.6f}\n'
' fc-discriminator\t=>\t'
'fake-d-loss: {meters[fake_d_loss]:.6f}\t'
'real-d-loss: {meters[real_d_loss]:.6f}\n'.format(
epoch + 1,
idx,
len(data_loader),
self.args.task,
meters=self.meters))
# visualization
if self.args.visualize and idx % self.args.visual_freq == 0:
u_inp_sample, u_pred_sample, u_cmap_sample = None, None, None
if self.args.unlabeled_batch_size > 0:
u_inp_sample = func.split_tensor_tuple(inp,
lbs,
lbs + 1,
reduce_dim=True)
u_pred_sample = func.split_tensor_tuple(activated_pred,
lbs,
lbs + 1,
reduce_dim=True)
u_cmap_sample = torch.sigmoid(fake_confidence_map[lbs])
self._visualize(
epoch, idx, True,
func.split_tensor_tuple(inp, 0, 1, reduce_dim=True),
func.split_tensor_tuple(activated_pred,
0,
1,
reduce_dim=True),
func.split_tensor_tuple(gt, 0, 1, reduce_dim=True),
torch.sigmoid(confidence_map[0]), u_inp_sample,
u_pred_sample, u_cmap_sample)
# the FC discriminator uses polynomiallr [ITER_LRERS]
self.d_lrer.step()
# update iteration-based lrers
if not self.args.is_epoch_lrer:
self.lrer.step()
# update epoch-based lrers
if self.args.is_epoch_lrer:
self.lrer.step()
def _train(self, data_loader, epoch):
self.meters.reset()
original_lbs = int(self.args.labeled_batch_size / 2)
original_bs = int(self.args.batch_size / 2)
self.model.train()
for idx, (inp, gt) in enumerate(data_loader):
timer = time.time()
# the rotated samples are generated in the 'self._batch_prehandle' function
# both 'inp' and 'gt' are tuples
# the last element in the tuple 'gt' is the ground truth of the rotation angle
inp, gt = self._batch_prehandle(inp, gt, True)
if len(gt) - 1 > 1 and idx == 0:
self._inp_warn()
self.optimizer.zero_grad()
# forward the model
resulter, debugger = self.model.forward(inp)
pred = tool.dict_value(resulter, 'pred')
activated_pred = tool.dict_value(resulter, 'activated_pred')
pred_rotation = tool.dict_value(resulter, 'rotation')
# calculate the supervised task constraint on the un-rotated labeled data
l_pred = func.split_tensor_tuple(pred, 0, original_lbs)
l_gt = func.split_tensor_tuple(gt, 0, original_lbs)
l_inp = func.split_tensor_tuple(inp, 0, original_lbs)
unrotated_task_loss = self.criterion.forward(
l_pred, l_gt[:-1], l_inp)
unrotated_task_loss = torch.mean(unrotated_task_loss)
self.meters.update('unrotated_task_loss', unrotated_task_loss.data)
# calculate the supervised task constraint on the rotated labeled data
l_rotated_pred = func.split_tensor_tuple(
pred, original_bs, original_bs + original_lbs)
l_rotated_gt = func.split_tensor_tuple(gt, original_bs,
original_bs + original_lbs)
l_rotated_inp = func.split_tensor_tuple(inp, original_bs,
original_bs + original_lbs)
rotated_task_loss = self.criterion.forward(l_rotated_pred,
l_rotated_gt[:-1],
l_rotated_inp)
rotated_task_loss = self.args.rotated_sup_scale * torch.mean(
rotated_task_loss)
self.meters.update('rotated_task_loss', rotated_task_loss.data)
task_loss = unrotated_task_loss + rotated_task_loss
# calculate the self-supervised rotation constraint
rotation_loss = self.rotation_criterion.forward(
pred_rotation, gt[-1])
rotation_loss = self.args.rotation_scale * torch.mean(
rotation_loss)
self.meters.update('rotation_loss', rotation_loss.data)
# backward and update the model
loss = task_loss + rotation_loss
loss.backward()
self.optimizer.step()
# calculate the accuracy of the rotation classifier
_, angle_idx = pred_rotation.topk(1, 1, True, True)
angle_idx = angle_idx.t()
rotation_acc = angle_idx.eq(gt[-1].view(1,
-1).expand_as(angle_idx))
rotation_acc = rotation_acc.view(-1).float().sum(
0, keepdim=True).mul_(100.0 / self.args.batch_size)
self.meters.update('rotation_acc', rotation_acc.data[0])
# logging
self.meters.update('batch_time', time.time() - timer)
if idx % self.args.log_freq == 0:
logger.log_info(
'step: [{0}][{1}/{2}]\tbatch-time: {meters[batch_time]:.3f}\n'
' task-{3}\t=>\t'
'unrotated-task-loss: {meters[unrotated_task_loss]:.6f}\t'
'rotated-task-loss: {meters[rotated_task_loss]:.6f}\n'
' rotation-{3}\t=>\t'
'rotation-loss: {meters[rotation_loss]:.6f}\t'
'rotation-acc: {meters[rotation_acc]:.6f}\n'.format(
epoch,
idx,
len(data_loader),
self.args.task,
meters=self.meters))
# visualization
if self.args.visualize and idx % self.args.visual_freq == 0:
self._visualize(
epoch, idx, True,
func.split_tensor_tuple(inp, 0, 1, reduce_dim=True),
func.split_tensor_tuple(activated_pred,
0,
1,
reduce_dim=True),
func.split_tensor_tuple(gt[:-1], 0, 1, reduce_dim=True))
# update iteration-based lrers
if not self.args.is_epoch_lrer:
self.lrer.step()
# update epoch-based lrers
if self.args.is_epoch_lrer:
self.lrer.step()
def _train(self, data_loader, epoch):
self.meters.reset()
lbs = self.args.labeled_batch_size
self.s_model.train()
self.t_model.train()
for idx, (inp, gt) in enumerate(data_loader):
timer = time.time()
# 's_inp', 't_inp' and 'gt' are tuples
s_inp, t_inp, gt = self._batch_prehandle(inp, gt, True)
if len(gt) > 1 and idx == 0:
self._inp_warn()
# calculate the ramp-up coefficient of the consistency constraint
cur_step = len(data_loader) * epoch + idx
total_steps = len(data_loader) * self.args.cons_rampup_epochs
cons_rampup_scale = func.sigmoid_rampup(cur_step, total_steps)
self.s_optimizer.zero_grad()
# forward the student model
s_resulter, s_debugger = self.s_model.forward(s_inp)
if not 'pred' in s_resulter.keys(
) or not 'activated_pred' in s_resulter.keys():
self._pred_err()
s_pred = tool.dict_value(s_resulter, 'pred')
s_activated_pred = tool.dict_value(s_resulter, 'activated_pred')
# calculate the supervised task constraint on the labeled data
l_s_pred = func.split_tensor_tuple(s_pred, 0, lbs)
l_gt = func.split_tensor_tuple(gt, 0, lbs)
l_s_inp = func.split_tensor_tuple(s_inp, 0, lbs)
# 'task_loss' is a tensor of 1-dim & n elements, where n == batch_size
s_task_loss = self.s_criterion.forward(l_s_pred, l_gt, l_s_inp)
s_task_loss = torch.mean(s_task_loss)
self.meters.update('s_task_loss', s_task_loss.data)
# forward the teacher model
with torch.no_grad():
t_resulter, t_debugger = self.t_model.forward(t_inp)
if not 'pred' in t_resulter.keys():
self._pred_err()
t_pred = tool.dict_value(t_resulter, 'pred')
t_activated_pred = tool.dict_value(t_resulter,
'activated_pred')
# calculate 't_task_loss' for recording
l_t_pred = func.split_tensor_tuple(t_pred, 0, lbs)
l_t_inp = func.split_tensor_tuple(t_inp, 0, lbs)
t_task_loss = self.s_criterion.forward(l_t_pred, l_gt, l_t_inp)
t_task_loss = torch.mean(t_task_loss)
self.meters.update('t_task_loss', t_task_loss.data)
# calculate the consistency constraint from the teacher model to the student model
t_pseudo_gt = Variable(t_pred[0].detach().data,
requires_grad=False)
if self.args.cons_for_labeled:
cons_loss = self.cons_criterion(s_pred[0], t_pseudo_gt)
elif self.args.unlabeled_batch_size > 0:
cons_loss = self.cons_criterion(s_pred[0][lbs:, ...],
t_pseudo_gt[lbs:, ...])
else:
cons_loss = self.zero_tensor
cons_loss = cons_rampup_scale * self.args.cons_scale * torch.mean(
cons_loss)
self.meters.update('cons_loss', cons_loss.data)
# backward and update the student model
loss = s_task_loss + cons_loss
loss.backward()
self.s_optimizer.step()
# update the teacher model by EMA
self._update_ema_variables(self.s_model, self.t_model,
self.args.ema_decay, cur_step)
# logging
self.meters.update('batch_time', time.time() - timer)
if idx % self.args.log_freq == 0:
logger.log_info(
'step: [{0}][{1}/{2}]\tbatch-time: {meters[batch_time]:.3f}\n'
' student-{3}\t=>\t'
's-task-loss: {meters[s_task_loss]:.6f}\t'
's-cons-loss: {meters[cons_loss]:.6f}\n'
' teacher-{3}\t=>\t'
't-task-loss: {meters[t_task_loss]:.6f}\n'.format(
epoch + 1,
idx,
len(data_loader),
self.args.task,
meters=self.meters))
# visualization
if self.args.visualize and idx % self.args.visual_freq == 0:
self._visualize(
epoch, idx, True,
func.split_tensor_tuple(s_inp, 0, 1, reduce_dim=True),
func.split_tensor_tuple(s_activated_pred,
0,
1,
reduce_dim=True),
func.split_tensor_tuple(t_inp, 0, 1, reduce_dim=True),
func.split_tensor_tuple(t_activated_pred,
0,
1,
reduce_dim=True),
func.split_tensor_tuple(gt, 0, 1, reduce_dim=True))
# update iteration-based lrers
if not self.args.is_epoch_lrer:
self.s_lrer.step()
# update epoch-based lrers
if self.args.is_epoch_lrer:
self.s_lrer.step()
def _train(self, data_loader, epoch):
self.meters.reset()
lbs = self.args.labeled_batch_size
self.l_model.train()
self.r_model.train()
self.fd_model.train()
# both 'inp' and 'gt' are tuples
for idx, (inp, gt) in enumerate(data_loader):
timer = time.time()
(l_inp, l_gt), (r_inp, r_gt) = self._batch_prehandle(inp, gt)
if len(l_gt) == len(r_gt) > 1 and idx == 0:
self._inp_warn()
# calculate the ramp-up coefficient of the dynamic consistency constraint
cur_steps = len(data_loader) * epoch + idx
total_steps = len(data_loader) * self.args.dc_rampup_epochs
dc_rampup_scale = func.sigmoid_rampup(cur_steps, total_steps)
# -----------------------------------------------------------------------------
# step-0: pre-forwarding to save GPU memory
# - forward the task models and the flaw detector
# - generate pseudo ground truth for the unlabeled data if the dynamic
# consistency constraint is enabled
# -----------------------------------------------------------------------------
with torch.no_grad():
l_resulter, l_debugger = self.l_model.forward(l_inp)
l_activated_pred = tool.dict_value(l_resulter,
'activated_pred')
r_resulter, r_debugger = self.r_model.forward(r_inp)
r_activated_pred = tool.dict_value(r_resulter,
'activated_pred')
# 'l_flawmap' and 'r_flawmap' will be used in step-2
fd_resulter, fd_debugger = self.fd_model.forward(
l_inp, l_activated_pred[0])
l_flawmap = tool.dict_value(fd_resulter, 'flawmap')
fd_resulter, fd_debugger = self.fd_model.forward(
r_inp, r_activated_pred[0])
r_flawmap = tool.dict_value(fd_resulter, 'flawmap')
l_dc_gt, r_dc_gt = None, None
l_fc_mask, r_fc_mask = None, None
# generate the pseudo ground truth for the dynamic consistency constraint
if self.args.ssl_mode in [MODE_GCT, MODE_DC]:
with torch.no_grad():
l_handled_flawmap = self.flawmap_handler.forward(l_flawmap)
r_handled_flawmap = self.flawmap_handler.forward(r_flawmap)
l_dc_gt, r_dc_gt, l_fc_mask, r_fc_mask = self.dcgt_generator.forward(
l_activated_pred[0].detach(),
r_activated_pred[0].detach(), l_handled_flawmap,
r_handled_flawmap)
# -----------------------------------------------------------------------------
# step-1: train the task models
# -----------------------------------------------------------------------------
for param in self.fd_model.parameters():
param.requires_grad = False
# train the 'l' task model
l_loss = self._task_model_iter(epoch, idx, True, 'l', lbs, l_inp,
l_gt, l_dc_gt, l_fc_mask,
dc_rampup_scale)
self.l_optimizer.zero_grad()
l_loss.backward()
self.l_optimizer.step()
# train the 'r' task model
r_loss = self._task_model_iter(epoch, idx, True, 'r', lbs, r_inp,
r_gt, r_dc_gt, r_fc_mask,
dc_rampup_scale)
self.r_optimizer.zero_grad()
r_loss.backward()
self.r_optimizer.step()
# -----------------------------------------------------------------------------
# step-2: train the flaw detector
# -----------------------------------------------------------------------------
for param in self.fd_model.parameters():
param.requires_grad = True
# generate the ground truth for the flaw detector (on labeled data only)
with torch.no_grad():
l_flawmap_gt = self.fdgt_generator.forward(
l_activated_pred[0][:lbs, ...].detach(),
self.task_func.sslgct_prepare_task_gt_for_fdgt(
l_gt[0][:lbs, ...]))
r_flawmap_gt = self.fdgt_generator.forward(
r_activated_pred[0][:lbs, ...].detach(),
self.task_func.sslgct_prepare_task_gt_for_fdgt(
r_gt[0][:lbs, ...]))
l_fd_loss = self.fd_criterion.forward(l_flawmap[:lbs, ...],
l_flawmap_gt)
l_fd_loss = self.args.fd_scale * torch.mean(l_fd_loss)
self.meters.update('l_fd_loss', l_fd_loss.data)
r_fd_loss = self.fd_criterion.forward(r_flawmap[:lbs, ...],
r_flawmap_gt)
r_fd_loss = self.args.fd_scale * torch.mean(r_fd_loss)
self.meters.update('r_fd_loss', r_fd_loss.data)
fd_loss = (l_fd_loss + r_fd_loss) / 2
self.fd_optimizer.zero_grad()
fd_loss.backward()
self.fd_optimizer.step()
# logging
self.meters.update('batch_time', time.time() - timer)
if idx % self.args.log_freq == 0:
logger.log_info(
'step: [{0}][{1}/{2}]\tbatch-time: {meters[batch_time]:.3f}\n'
' l-{3}\t=>\t'
'l-task-loss: {meters[l_task_loss]:.6f}\t'
'l-dc-loss: {meters[l_dc_loss]:.6f}\t'
'l-fc-loss: {meters[l_fc_loss]:.6f}\n'
' r-{3}\t=>\t'
'r-task-loss: {meters[r_task_loss]:.6f}\t'
'r-dc-loss: {meters[r_dc_loss]:.6f}\t'
'r-fc-loss: {meters[r_fc_loss]:.6f}\n'
' fd\t=>\t'
'l-fd-loss: {meters[l_fd_loss]:.6f}\t'
'r-fd-loss: {meters[r_fd_loss]:.6f}\n'.format(
epoch,
idx,
len(data_loader),
self.args.task,
meters=self.meters))
# the flaw detector uses polynomiallr [ITER_LRERS]
self.fd_lrer.step()
# update iteration-based lrers
if not self.args.is_epoch_lrer:
self.l_lrer.step()
self.r_lrer.step()
# update epoch-based lrers
if self.args.is_epoch_lrer:
self.l_lrer.step()
self.r_lrer.step()
def _validate(self, data_loader, epoch):
self.meters.reset()
lbs = self.args.labeled_batch_size
self.l_model.eval()
self.r_model.eval()
self.fd_model.eval()
for idx, (inp, gt) in enumerate(data_loader):
timer = time.time()
(l_inp, l_gt), (r_inp, r_gt) = self._batch_prehandle(inp, gt)
if len(l_gt) == len(r_gt) > 1 and idx == 0:
self._inp_warn()
l_dc_gt, r_dc_gt = None, None
l_fc_mask, r_fc_mask = None, None
if self.args.ssl_mode in [MODE_GCT, MODE_DC]:
l_resulter, l_debugger = self.l_model.forward(l_inp)
l_activated_pred = tool.dict_value(l_resulter,
'activated_pred')
r_resulter, r_debugger = self.r_model.forward(r_inp)
r_activated_pred = tool.dict_value(r_resulter,
'activated_pred')
fd_resulter, fd_debugger = self.fd_model.forward(
l_inp, l_activated_pred[0])
l_flawmap = tool.dict_value(fd_resulter, 'flawmap')
fd_resulter, fd_debugger = self.fd_model.forward(
r_inp, r_activated_pred[0])
r_flawmap = tool.dict_value(fd_resulter, 'flawmap')
l_handled_flawmap = self.flawmap_handler.forward(l_flawmap)
r_handled_flawmap = self.flawmap_handler.forward(r_flawmap)
l_dc_gt, r_dc_gt, l_fc_mask, r_fc_mask = self.dcgt_generator.forward(
l_activated_pred[0].detach(), r_activated_pred[0].detach(),
l_handled_flawmap, r_handled_flawmap)
l_loss = self._task_model_iter(epoch, idx, False, 'l', lbs, l_inp,
l_gt, l_dc_gt, l_fc_mask, 1)
r_loss = self._task_model_iter(epoch, idx, False, 'r', lbs, r_inp,
r_gt, r_dc_gt, r_fc_mask, 1)
self.meters.update('batch_time', time.time() - timer)
if idx % self.args.log_freq == 0:
logger.log_info(
'step: [{0}][{1}/{2}]\tbatch-time: {meters[batch_time]:.3f}\n'
' l-{3}\t=>\t'
'l-task-loss: {meters[l_task_loss]:.6f}\t'
'l-dc-loss: {meters[l_dc_loss]:.6f}\t'
'l-fc-loss: {meters[l_fc_loss]:.6f}\n'
' r-{3}\t=>\t'
'r-task-loss: {meters[r_task_loss]:.6f}\t'
'r-dc-loss: {meters[r_dc_loss]:.6f}\t'
'r-fc-loss: {meters[r_fc_loss]:.6f}\n'
' fd\t=>\t'
'l-fd-loss: {meters[l_fd_loss]:.6f}\t'
'r-fd-loss: {meters[r_fd_loss]:.6f}\n'.format(
epoch,
idx,
len(data_loader),
self.args.task,
meters=self.meters))
# metrics
metrics_info = {'l': '', 'r': ''}
for key in sorted(list(self.meters.keys())):
if self.task_func.METRIC_STR in key:
for id_str in metrics_info.keys():
if key.startswith(id_str):
metrics_info[id_str] += '{0}: {1:.6f}\t'.format(
key, self.meters[key])
logger.log_info(
'Validation metrics:\n l-metrics\t=>\t{0}\n r-metrics\t=>\t{1}\n'
.format(metrics_info['l'].replace('_', '-'),
metrics_info['r'].replace('_', '-')))
def _preprocess_arguments(self):
""" Preprocess the arguments in the script.
"""
# create the output folder to store the results
self.args.out_path = "{root}/{exp_id}/{date:%Y-%m-%d_%H:%M:%S}/".format(
root=self.args.out_path,
exp_id=self.args.exp_id,
date=datetime.now())
if not os.path.exists(self.args.out_path):
os.makedirs(self.args.out_path)
# prepare logger
exp_op = 'val' if self.args.validation else 'train'
logger.log_mode(self.args.debug)
logger.log_file(
os.path.join(self.args.out_path, '{0}.log'.format(exp_op)),
self.args.debug)
logger.log_info('Result folder: \n {0} \n'.format(self.args.out_path))
# print experimental args
cmd.print_args()
# set task name
self.args.task = self.NAME
# check the task-specific components dicts required by the SSL algorithm
if not len(self.args.models) == len(self.args.optimizers) == len(
self.args.lrers) == len(self.args.criterions):
logger.log_err(
'Condition:\n'
'\tlen(self.args.models) == len(self.args.optimizers) == len(self.args.lrers) == len(self.args.criterions\n'
'is not satisfied in the script\n')
for (model, criterion, optimizer, lrer) in \
zip(self.args.models.values(), self.args.criterions.values(), self.args.optimizers.values(), self.args.lrers.values()):
if model not in self.model.__dict__:
logger.log_err(
'Unsupport model: {0} for task: {1}\n'
'Please add the export function in task\'s \'model.py\'\n'.
format(model, self.args.task))
elif criterion not in self.criterion.__dict__:
logger.log_err(
'Unsupport criterion: {0} for task: {1}\n'
'Please add the export function in task\'s \'criterion.py\'\n'
.format(criterion, self.args.task))
elif optimizer not in nnoptimizer.__dict__:
logger.log_err(
'Unsupport optimizer: {0}\n'
'Please implement the optimizer wrapper in \'pixelssl/nn/optimizer.py\'\n'
.format(optimizer))
elif lrer not in nnlrer.__dict__:
logger.log_err(
'Unsupport learning rate scheduler: {0}\n'
'Please implement lr scheduler wrapper in \'pixelssl/nn/lrer.py\'\n'
.format(lrer))
# check the types of lrers
for lrer in self.args.lrers.values():
if lrer in nnlrer.EPOCH_LRERS:
is_epoch_lrer = True
elif lrer in nnlrer.ITER_LRERS:
is_epoch_lrer = False
else:
logger.log_err(
'Unknown learning rate scheduler ({0}) type\n'
'Please add it into either EPOCH_LRERS or ITER_LRERS in \'pixelssl/nn/lrer.py\'\n'
'PixelSSL supports: \n'
' EPOCH_LRERS\t=>\t{1}\n ITER_LRERS\t=>\t{2}\n'.format(
lrer, nnlrer.EPOCH_LRERS, nnlrer.ITER_LRERS))
if self.args.is_epoch_lrer is None:
self.args.is_epoch_lrer = is_epoch_lrer
elif self.args.is_epoch_lrer != is_epoch_lrer:
logger.log_err(
'Unmatched lr scheduler types\t=>\t{0}\n'
'All lrers of the task models should have the same types (either EPOCH_LRERS or ITER_LRERS)\n'
'PixelSSL supports: \n'
' EPOCH_LRERS\t=>\t{1}\n ITER_LRERS\t=>\t{2}\n'.format(
self.args.lrers, nnlrer.EPOCH_LRERS,
nnlrer.ITER_LRERS))
self.args.checkpoint_path = os.path.join(self.args.out_path, 'ckpt')
if not os.path.exists(self.args.checkpoint_path):
os.makedirs(self.args.checkpoint_path)
if self.args.visualize:
self.args.visual_debug_path = os.path.join(self.args.out_path,
'visualization/debug')
self.args.visual_train_path = os.path.join(self.args.out_path,
'visualization/train')
self.args.visual_val_path = os.path.join(self.args.out_path,
'visualization/val')
for vpath in [
self.args.visual_debug_path, self.args.visual_train_path,
self.args.visual_val_path
]:
if not os.path.exists(vpath):
os.makedirs(vpath)
# handle argumens for multiply GPUs training
self.args.gpus = torch.cuda.device_count()
if self.args.gpus < 1:
logger.log_err('No GPU be detected\n'
'PixelSSL requires at least one Nvidia GPU\n')
logger.log_info('GPU: \n Total GPU(s): {0}'.format(self.args.gpus))
self.args.lr *= self.args.gpus
self.args.num_workers *= self.args.gpus
self.args.batch_size *= self.args.gpus
self.args.unlabeled_batch_size *= self.args.gpus
# TODO: support unsupervised and self-supervised training
if self.args.unlabeled_batch_size >= self.args.batch_size:
logger.log_err(
'The argument \'unlabeled_batch_size\' ({0}) should be smaller than \'batch_size\' ({1}) '
'since PixelSSL only supports semi-supervised learning now\n')
self.args.labeled_batch_size = self.args.batch_size - self.args.unlabeled_batch_size
logger.log_info(
' Total learn rate: {0}\n Total labeled batch size: {1}\n'
' Total unlabeled batch size: {2}\n Total data workers: {3}\n'.
format(self.args.lr, self.args.labeled_batch_size,
self.args.unlabeled_batch_size, self.args.num_workers))
