model.train()
requires_grad_(model, True)
accs = AverageMeter()
losses = AverageMeter()
attack_norms = AverageMeter()
scheduler.step()
length = len(train_loader)
for i, (images, labels) in enumerate(tqdm.tqdm(train_loader, ncols=80)):
images, labels = images.to(DEVICE), labels.to(DEVICE)
if args.adv is not None and epoch >= args.adv:
model.eval()
requires_grad_(model, False)
with torch.no_grad():
accs.append(
(model(images).argmax(1) == labels).float().mean().item())
adv = attacker.attack(model, images, labels)
l2_norms = (adv - images).view(args.batch_size, -1).norm(2, 1)
mean_norm = l2_norms.mean()
if args.max_norm:
adv = torch.renorm(
adv - images, p=2, dim=0, maxnorm=args.max_norm) + images
attack_norms.append(mean_norm.item())
requires_grad_(model, True)
model.train()
logits = model(adv.detach())
else:
logits = model(images)
accs.append((logits.argmax(1) == labels).float().mean().item())
loss = F.cross_entropy(logits, labels)
def main(epochs, seed):
device = torch.device('cuda:0' if torch.cuda.is_available() else 'cpu')
cudnn.deterministic = True
torch.manual_seed(seed)
train_loader, valid_loader, test_loader = load_dataset()
model = load_model()
model = torch.nn.DataParallel(model)
model.to(device)
optimizer, scheduler = get_optimizer_scheduler(
parameters=model.parameters())
train_losses = AverageMeter()
train_accs = AverageMeter()
best_valid_acc = 0
best_valid_loss = float('inf')
best_model_dict = deepcopy(model.module.state_dict())
for epoch in range(epochs):
model.train()
train_losses.reset(), train_accs.reset()
loader_length = len(train_loader)
pbar = tqdm(train_loader, ncols=80, desc='Training')
start = time.time()
for i, (images, labels) in enumerate(pbar):
images, labels = images.to(device), labels.to(device,
non_blocking=True)
logits = model(images)
predictions = model.module.pooling.predictions(logits=logits)
loss = model.module.pooling.loss(logits=logits, labels=labels)
optimizer.zero_grad()
loss.backward()
optimizer.step()
acc = (predictions == labels).float().mean().item()
loss = loss.item()
step = epoch + i / loader_length
ex.log_scalar('training.loss', loss, step)
ex.log_scalar('training.acc', acc, step)
train_losses.append(loss)
train_accs.append(acc)
scheduler.step()
end = time.time()
duration = end - start
# evaluate on validation set
valid_metrics = validation(model=model,
loader=valid_loader,
device=device)
if valid_metrics['losses'].mean() <= best_valid_loss:
best_valid_acc = valid_metrics['accuracy']
best_valid_loss = valid_metrics['losses'].mean()
best_model_dict = deepcopy(model.module.state_dict())
ex.log_scalar('validation.loss', valid_metrics['losses'].mean(),
epoch + 1)
ex.log_scalar('validation.acc', valid_metrics['accuracy'], epoch + 1)
print('Epoch {:02d} | Duration: {:.1f}s - per batch ({}): {:.3f}s'.
format(epoch, duration, loader_length, duration / loader_length))
print(
' ' * 8,
'| Train loss: {:.4f} acc: {:.3f}'.format(train_losses.avg,
train_accs.avg))
print(
' ' * 8, '| Valid loss: {:.4f} acc: {:.3f}'.format(
valid_metrics['losses'].mean(), valid_metrics['accuracy']))
# load best model based on validation loss
model = load_model()
model.load_state_dict(best_model_dict)
model.to(device)
# evaluate on test set
test_metrics = test(model=model, loader=test_loader, device=device)
ex.log_scalar('test.loss', test_metrics['losses'].mean(), epochs)
ex.log_scalar('test.acc', test_metrics['accuracy'], epochs)
# save model
save_name = get_save_name() + '.pickle'
torch.save(state_dict_to_cpu(best_model_dict), save_name)
ex.add_artifact(os.path.abspath(save_name))
# save test metrics
if len(ex.current_run.observers) > 0:
dataset = ex.current_run.config['dataset']['name']
pooling = ex.current_run.config['model']['pooling']
split = ex.current_run.config['dataset']['split']
fold = ex.current_run.config['dataset']['fold']
torch.save(
test_metrics,
os.path.join(
ex.current_run.observers[0].dir,
'{}_{}_split-{}_fold-{}.pkl'.format(dataset, pooling, split,
fold)))
# metrics to info.json
info_to_save = [
'labels', 'logits', 'probabilities', 'predictions', 'losses',
'accuracy', 'AP', 'confusion_matrix', 'dice', 'dice_per_image',
'mean_dice', 'iou', 'iou_per_image', 'mean_iou'
]
for k in info_to_save:
ex.info[k] = test_metrics[k]
return test_metrics['mean_dice']
accs = AverageMeter()
losses = AverageMeter()
attack_norms = AverageMeter()
length = len(train_loader)
for i, (images, labels) in enumerate(tqdm.tqdm(train_loader, ncols=80)):
images, labels = images.to(DEVICE), labels.to(DEVICE)
logits = model(images)
loss = F.cross_entropy(logits, labels)
optimizer.zero_grad()
loss.backward()
optimizer.step()
accs.append((logits.argmax(1) == labels).float().mean().item())
losses.append(loss.item())
print('Epoch {} | Training | Loss: {:.4f}, Accs: {:.4f}'.format(
epoch, losses.avg, accs.avg))
cudnn.benchmark = False
model.eval()
requires_grad_(m, False)
val_accs = AverageMeter()
val_losses = AverageMeter()
with torch.no_grad():
for i, (images, labels) in enumerate(tqdm.tqdm(val_loader, ncols=80)):
images, labels = images.to(DEVICE), labels.to(DEVICE)
def main(epochs, seed):
device = torch.device('cuda:0' if torch.cuda.is_available() else 'cpu')
cudnn.deterministic = True
torch.manual_seed(seed)
train_loader, valid_loader, test_loader = load_dataset()
model = load_model()
if torch.cuda.device_count() > 1:
model = torch.nn.DataParallel(model)
model.to(device)
optimizer, scheduler = get_optimizer_scheduler(
parameters=model.parameters())
train_losses = AverageMeter()
train_accs = AverageMeter()
best_valid_acc = 0
best_valid_loss = float('inf')
best_model_dict = deepcopy(model.state_dict())
for epoch in range(epochs):
model.train()
train_losses.reset(), train_accs.reset()
loader_length = len(train_loader)
pbar = tqdm(train_loader, ncols=80, desc='Training')
start = time.time()
for i, (images, labels) in enumerate(pbar):
images, labels = images.to(device), labels.to(device,
non_blocking=True)
logits = model(images)
predictions = model.pooling.predictions(logits=logits)
loss = model.pooling.loss(logits=logits, labels=labels)
optimizer.zero_grad()
loss.backward()
optimizer.step()
acc = (predictions == labels).float().mean().item()
loss = loss.item()
step = epoch + i / loader_length
ex.log_scalar('training.loss', loss, step)
ex.log_scalar('training.acc', acc, step)
train_losses.append(loss)
train_accs.append(acc)
scheduler.step()
end = time.time()
duration = end - start
# evaluate on validation set
valid_metrics = evaluate(model=model,
loader=valid_loader,
device=device)
if valid_metrics['loss'] <= best_valid_loss:
best_valid_acc = valid_metrics['accuracy']
best_valid_loss = valid_metrics['loss']
best_model_dict = deepcopy(model.state_dict())
ex.log_scalar('validation.loss', valid_metrics['loss'], epoch + 1)
ex.log_scalar('validation.acc', valid_metrics['accuracy'], epoch + 1)
print('Epoch {:02d} | Duration: {:.1f}s - per batch ({}): {:.3f}s'.
format(epoch, duration, loader_length, duration / loader_length))
print(
' ' * 8, '| Train\tloss: {:.4f}\tacc: {:.3f}'.format(
train_losses.avg, train_accs.avg))
print(
' ' * 8, '| Valid\tloss: {:.4f}\tacc: {:.3f}'.format(
valid_metrics['loss'], valid_metrics['accuracy']))
# load best model based on validation loss
model.load_state_dict(best_model_dict)
# evaluate on test set
test_metrics = evaluate(model=model, loader=test_loader, device=device)
ex.log_scalar('test.loss', test_metrics['loss'], epochs)
ex.log_scalar('test.acc', test_metrics['accuracy'], epochs)
# save model
save_name = get_save_name() + '.pickle'
torch.save(state_dict_to_cpu(best_model_dict), save_name)
ex.add_artifact(os.path.abspath(save_name))
# metrics to info.json
for k, v in test_metrics.items():
ex.info[k] = v
return test_metrics['accuracy']
def main(epochs, seed):
device = torch.device('cuda:0' if torch.cuda.is_available() else 'cpu')
cudnn.deterministic = True
torch.manual_seed(seed)
train_loader, valid_loader, test_loader = load_dataset()
model = load_unet()
model = torch.nn.DataParallel(model)
model.to(device)
optimizer, scheduler = get_optimizer_scheduler(
parameters=model.parameters())
train_losses = AverageMeter()
batch_evaluator = Evaluator(2)
train_dices_background = AverageMeter()
train_dices = AverageMeter()
best_valid_dice = 0
best_valid_loss = float('inf')
best_model_dict = deepcopy(model.module.state_dict())
for epoch in range(epochs):
model.train()
train_losses.reset(), train_dices_background.reset(
), train_dices.reset()
loader_length = len(train_loader)
pbar = tqdm(train_loader, ncols=80, desc='Training')
start = time.time()
for i, (images, mask, label) in enumerate(pbar):
images, mask = images.to(device), mask.squeeze(1).to(
device, non_blocking=True)
seg_logits = model(images)
if ex.current_run.config['dataset']['name'] == 'caltech_birds':
class_mask = (mask > 0.5).long()
else:
class_mask = (mask != 0).long()
loss = F.cross_entropy(seg_logits, class_mask)
optimizer.zero_grad()
loss.backward()
optimizer.step()
batch_evaluator.add_batch(class_mask, seg_logits.argmax(1))
dices = batch_evaluator.dice()
dice_background = dices[0].item()
dice = dices[1].item()
batch_evaluator.reset()
loss = loss.item()
step = epoch + i / loader_length
ex.log_scalar('training.loss', loss, step)
ex.log_scalar('training.mean_dice_background', dice_background,
step)
ex.log_scalar('training.mean_dice', dice, step)
train_losses.append(loss)
train_dices_background.append(dice_background)
train_dices.append(dice)
scheduler.step()
duration = time.time() - start
# evaluate on validation set
valid_metrics = evaluate(model=model,
loader=valid_loader,
device=device)
if valid_metrics['losses'].mean() <= best_valid_loss:
best_valid_dice = valid_metrics['mean_dice']
best_valid_loss = valid_metrics['losses'].mean()
best_model_dict = deepcopy(model.module.state_dict())
ex.log_scalar('validation.loss', np.mean(valid_metrics['losses']),
epoch + 1)
ex.log_scalar('validation.mean_dice', valid_metrics['mean_dice'],
epoch + 1)
print('Epoch {:02d} | Duration: {:.1f}s - per batch ({}): {:.3f}s'.
format(epoch, duration, loader_length, duration / loader_length))
print(
' ' * 8,
'| Train loss: {:.4f} dice(b): {:.3f} dice: {:.3f}'.format(
train_losses.avg, train_dices_background.avg, train_dices.avg))
print(
' ' * 8,
'| Valid loss: {:.4f} dice(b): {:.3f} dice: {:.3f}'.format(
valid_metrics['losses'].mean(),
valid_metrics['mean_dice_background'],
valid_metrics['mean_dice']))
# load best model based on validation loss
model = load_unet()
model.load_state_dict(best_model_dict)
model.to(device)
# evaluate on test set
test_metrics = evaluate(model=model,
loader=test_loader,
device=device,
test=True)
ex.log_scalar('test.loss', test_metrics['losses'].mean(), epochs)
ex.log_scalar('test.mean_dice_background',
test_metrics['mean_dice_background'], epochs)
ex.log_scalar('test.mean_dice', test_metrics['mean_dice'], epochs)
# save model
save_name = get_save_name() + '.pickle'
torch.save(state_dict_to_cpu(best_model_dict), save_name)
ex.add_artifact(os.path.abspath(save_name))
# save test metrics
if len(ex.current_run.observers) > 0:
dataset = ex.current_run.config['dataset']['name']
split = ex.current_run.config['dataset']['split']
fold = ex.current_run.config['dataset']['fold']
torch.save(
test_metrics,
os.path.join(
ex.current_run.observers[0].dir,
'{}_unet_split-{}_fold-{}.pkl'.format(dataset, split, fold)))
# metrics to info.json
info_to_save = [
'labels', 'losses', 'dice_per_image', 'mean_dice', 'dice',
'iou_per_image', 'mean_iou', 'iou'
]
for k in info_to_save:
ex.info[k] = test_metrics[k]
return test_metrics['mean_dice']
