def fine_tune_train_and_val(args, recorder):
# =
global lowest_val_loss, best_prec1
os.environ['TF_CPP_MIN_LOG_LEVEL'] = '2' # close the warning
torch.manual_seed(1)
cudnn.benchmark = True
timer = Timer()
# == dataset config==
num_class, data_length, image_tmpl = ft_data_config(args)
train_transforms, test_transforms, eval_transforms = ft_augmentation_config(
args)
train_data_loader, val_data_loader, _, _, _, _ = ft_data_loader_init(
args, data_length, image_tmpl, train_transforms, test_transforms,
eval_transforms)
# == model config==
model = ft_model_config(args, num_class)
recorder.record_message('a', '=' * 100)
recorder.record_message('a', '-' * 40 + 'finetune' + '-' * 40)
recorder.record_message('a', '=' * 100)
# == optim config==
train_criterion, val_criterion, optimizer = ft_optim_init(args, model)
# == data augmentation(self-supervised) config==
tc = TC(args)
# == train and eval==
print('*' * 70 + 'Step2: fine tune' + '*' * 50)
for epoch in range(args.ft_start_epoch, args.ft_epochs):
timer.tic()
ft_adjust_learning_rate(optimizer, args.ft_lr, epoch, args.ft_lr_steps)
train_prec1, train_loss = train(args, tc, train_data_loader, model,
train_criterion, optimizer, epoch,
recorder)
# train_prec1, train_loss = random.random() * 100, random.random()
recorder.record_ft_train(train_loss / 5.0, train_prec1 / 100.0)
if (epoch + 1) % args.ft_eval_freq == 0:
val_prec1, val_loss = validate(args, tc, val_data_loader, model,
val_criterion, recorder)
# val_prec1, val_loss = random.random() * 100, random.random()
recorder.record_ft_val(val_loss / 5.0, val_prec1 / 100.0)
is_best = val_prec1 > best_prec1
best_prec1 = max(val_prec1, best_prec1)
checkpoint = {
'epoch': epoch + 1,
'arch': "i3d",
'state_dict': model.state_dict(),
'best_prec1': best_prec1
}
recorder.save_ft_model(checkpoint, is_best)
timer.toc()
left_time = timer.average_time * (args.ft_epochs - epoch)
message = "Step2: fine tune best_prec1 is: {} left time is : {} now is : {}".format(
best_prec1, timer.format(left_time), datetime.now())
print(message)
recorder.record_message('a', message)
return recorder.filename
def pretext_train(args, recorder):
if args.gpus is not None:
print("Use GPU: {} for pretext training".format(args.gpus))
num_class, data_length, image_tmpl = pt_data_config(args)
# print("tp_length is: ", data_length)
train_transforms, test_transforms, eval_transforms = pt_augmentation_config(
args)
train_loader, val_loader, eval_loader, train_samples, val_samples, eval_samples = pt_data_loader_init(
args, data_length, image_tmpl, train_transforms, test_transforms,
eval_transforms)
n_data = len(train_loader)
model, model_ema = pt_model_config(args, num_class)
# == optim config==
contrast, criterion, optimizer = pt_optim_init(args, model, n_data)
model = model.cuda()
# == load weights ==
model, model_ema = pt_load_weight(args, model, model_ema, optimizer,
contrast)
if args.pt_method in ['dsm', 'moco']:
model_ema = model_ema.cuda()
# copy weights from `model' to `model_ema'
moment_update(model, model_ema, 0)
cudnn.benchmark = True
# optionally resume from a checkpoint
args.start_epoch = 1
# ==================================== our data augmentation method=================================
if args.pt_method in ['dsm', 'dsm_triplet']:
pos_aug = GenPositive()
neg_aug = GenNegative()
# =======================================add message =====================
recorder.record_message('a', '=' * 100)
recorder.record_message('a', '-' * 40 + 'pretrain' + '-' * 40)
recorder.record_message('a', '=' * 100)
# ====================update lr_decay from str to numpy=========
iterations = args.pt_lr_decay_epochs.split(',')
args.pt_lr_decay_epochs = list([])
for it in iterations:
args.pt_lr_decay_epochs.append(int(it))
timer = Timer()
# routine
print('*' * 70 + 'Step1: pretrain' + '*' * 20 + '*' * 50)
for epoch in range(args.pt_start_epoch, args.pt_epochs + 1):
timer.tic()
pt_adjust_learning_rate(epoch, args, optimizer)
print("==> training...")
time1 = time.time()
if args.pt_method == "moco":
loss, prob = train_moco(epoch, train_loader, model, model_ema,
contrast, criterion, optimizer, args,
recorder)
elif args.pt_method == "dsm":
loss, prob = train_dsm(epoch, train_loader, model, model_ema,
contrast, criterion, optimizer, args,
pos_aug, neg_aug, recorder)
# loss, prob = epoch * 0.01, 0.02*epoch
elif args.pt_method == "dsm_triplet":
loss = train_dsm_triplet(epoch, train_loader, model, optimizer,
args, pos_aug, neg_aug, recorder)
else:
Exception("Not support method now!")
recorder.record_pt_train(loss)
time2 = time.time()
print('epoch {}, total time {:.2f}'.format(epoch, time2 - time1))
timer.toc()
left_time = timer.average_time * (args.pt_epochs - epoch)
message = "Step1: pretrain now loss is: {} left time is : {} now is: {}".format(
loss, timer.format(left_time), datetime.now())
print(message)
recorder.record_message('a', message)
state = {
'opt': args,
'model': model.state_dict(),
'contrast': contrast.state_dict(),
'optimizer': optimizer.state_dict(),
'epoch': epoch,
}
recorder.save_pt_model(args, state, epoch)
print("finished pretrain, the trained model is record in: {}".format(
recorder.pt_checkpoint))
return recorder.pt_checkpoint
def train_and_eval(args):
# =
global lowest_val_loss, best_prec1
os.environ['TF_CPP_MIN_LOG_LEVEL'] = '2' # close the warning
os.environ["CUDA_VISIBLE_DEVICES"] = args.gpus
torch.manual_seed(1)
cudnn.benchmark = True
timer = Timer()
recorder = Record(args)
# == dataset config==
num_class, data_length, image_tmpl = data_config(args)
train_transforms, test_transforms = augmentation_config(args)
train_data_loader, val_data_loader = data_loader_init(
args, data_length, image_tmpl, train_transforms, test_transforms)
# == model config==
models = []
optimizers = []
for i in range(args.mutual_num):
model = model_config(args, num_class)
models.append(model)
recorder.record_message('a', '=' * 100)
recorder.record_message('a', str(model.module))
recorder.record_message('a', '=' * 100)
# == optim config==
for i in range(args.mutual_num):
train_criterion, val_criterion, optimizer = optim_init(args, model)
optimizers.append(optimizer)
# == data augmentation(self-supervised) config==
tc = TC(args)
# == train and eval==
for epoch in range(args.start_epoch, args.epochs):
timer.tic()
for i in range(args.mutual_num):
adjust_learning_rate(optimizers[i], args.lr, epoch, args.lr_steps)
if args.eval_indict == 'acc':
train_prec1, train_loss = train(args, tc, train_data_loader,
models, train_criterion,
optimizers, epoch, recorder)
# train_prec1, train_loss = random.random() * 100, random.random()
recorder.record_train(train_loss / 5.0, train_prec1 / 100.0)
else:
train_loss = train(args, tc, train_data_loader, models,
train_criterion, optimizers, epoch, recorder)
# train_prec1, train_loss = random.random() * 100, random.random()
recorder.record_train(train_loss)
if (epoch + 1) % args.eval_freq == 0:
if args.eval_indict == 'acc':
val_prec1, val_loss = validate(args, tc, val_data_loader,
models, val_criterion, recorder)
# val_prec1, val_loss = random.random() * 100, random.random()
recorder.record_val(val_loss / 5.0, val_prec1 / 100.0)
is_best = val_prec1 > best_prec1
best_prec1 = max(val_prec1, best_prec1)
checkpoint = {
'epoch': epoch + 1,
'arch': "i3d",
'state_dict': model.state_dict(),
'best_prec1': best_prec1
}
else:
val_loss = validate(args, tc, val_data_loader, models,
val_criterion, recorder)
# val_loss = random.random()
# val_prec1, val_loss = random.random() * 100, random.random()
recorder.record_val(val_loss)
is_best = val_loss < lowest_val_loss
lowest_val_loss = min(val_loss, lowest_val_loss)
checkpoint = {
'epoch': epoch + 1,
'arch': "i3d",
'state_dict': model.state_dict(),
'lowest_val': lowest_val_loss
}
recorder.save_model(checkpoint, is_best)
timer.toc()
left_time = timer.average_time * (args.epochs - epoch)
if args.eval_indict == 'acc':
message = "best_prec1 is: {} left time is : {}".format(
best_prec1, timer.format(left_time))
else:
message = "lowest_val_loss is: {} left time is : {}".format(
lowest_val_loss, timer.format(left_time))
print(message)
recorder.record_message('a', message)
# return recorder.best_name
return recorder.filename