def train(args, snapshot_path):
base_lr = args.base_lr
num_classes = args.num_classes
batch_size = args.batch_size
max_iterations = args.max_iterations
def worker_init_fn(worker_id):
random.seed(args.seed + worker_id)
model = net_factory(net_type=args.model, in_chns=1, class_num=num_classes)
db_train = BaseDataSets(base_dir=args.root_path,
split="train",
num=None,
transform=transforms.Compose(
[RandomGenerator(args.patch_size)]))
total_slices = len(db_train)
labeled_slice = patients_to_slices(args.root_path, args.labeled_num)
print("Total silices is: {}, labeled slices is: {}".format(
total_slices, labeled_slice))
labeled_idxs = list(range(0, labeled_slice))
unlabeled_idxs = list(range(labeled_slice, total_slices))
batch_sampler = TwoStreamBatchSampler(labeled_idxs, unlabeled_idxs,
batch_size,
batch_size - args.labeled_bs)
trainloader = DataLoader(db_train,
batch_sampler=batch_sampler,
num_workers=16,
pin_memory=True,
worker_init_fn=worker_init_fn)
db_val = BaseDataSets(base_dir=args.root_path, split="val")
valloader = DataLoader(db_val, batch_size=1, shuffle=False, num_workers=1)
model.train()
optimizer = optim.SGD(model.parameters(),
lr=base_lr,
momentum=0.9,
weight_decay=0.0001)
ce_loss = CrossEntropyLoss()
dice_loss = losses.DiceLoss(num_classes)
writer = SummaryWriter(snapshot_path + '/log')
logging.info("{} iterations per epoch".format(len(trainloader)))
iter_num = 0
max_epoch = max_iterations // len(trainloader) + 1
best_performance = 0.0
iterator = tqdm(range(max_epoch), ncols=70)
for epoch_num in iterator:
for i_batch, sampled_batch in enumerate(trainloader):
volume_batch, label_batch = sampled_batch['image'], sampled_batch[
'label']
volume_batch, label_batch = volume_batch.cuda(), label_batch.cuda()
unlabeled_volume_batch = volume_batch[args.labeled_bs:]
outputs = model(volume_batch)
outputs_soft = torch.softmax(outputs, dim=1)
loss_ce = ce_loss(outputs[:args.labeled_bs],
label_batch[:][:args.labeled_bs].long())
loss_dice = dice_loss(outputs_soft[:args.labeled_bs],
label_batch[:args.labeled_bs].unsqueeze(1))
supervised_loss = 0.5 * (loss_dice + loss_ce)
consistency_weight = get_current_consistency_weight(iter_num //
150)
consistency_loss = losses.entropy_loss(outputs_soft, C=4)
loss = supervised_loss + consistency_weight * consistency_loss
optimizer.zero_grad()
loss.backward()
optimizer.step()
lr_ = base_lr * (1.0 - iter_num / max_iterations)**0.9
for param_group in optimizer.param_groups:
param_group['lr'] = lr_
iter_num = iter_num + 1
writer.add_scalar('info/lr', lr_, iter_num)
writer.add_scalar('info/total_loss', loss, iter_num)
writer.add_scalar('info/loss_ce', loss_ce, iter_num)
writer.add_scalar('info/loss_dice', loss_dice, iter_num)
writer.add_scalar('info/consistency_loss', consistency_loss,
iter_num)
writer.add_scalar('info/consistency_weight', consistency_weight,
iter_num)
logging.info(
'iteration %d : loss : %f, loss_ce: %f, loss_dice: %f' %
(iter_num, loss.item(), loss_ce.item(), loss_dice.item()))
if iter_num % 20 == 0:
image = volume_batch[1, 0:1, :, :]
writer.add_image('train/Image', image, iter_num)
outputs = torch.argmax(torch.softmax(outputs, dim=1),
dim=1,
keepdim=True)
writer.add_image('train/Prediction', outputs[1, ...] * 50,
iter_num)
labs = label_batch[1, ...].unsqueeze(0) * 50
writer.add_image('train/GroundTruth', labs, iter_num)
if iter_num > 0 and iter_num % 200 == 0:
model.eval()
metric_list = 0.0
for i_batch, sampled_batch in enumerate(valloader):
metric_i = test_single_volume(sampled_batch["image"],
sampled_batch["label"],
model,
classes=num_classes)
metric_list += np.array(metric_i)
metric_list = metric_list / len(db_val)
for class_i in range(num_classes - 1):
writer.add_scalar('info/val_{}_dice'.format(class_i + 1),
metric_list[class_i, 0], iter_num)
writer.add_scalar('info/val_{}_hd95'.format(class_i + 1),
metric_list[class_i, 1], iter_num)
performance = np.mean(metric_list, axis=0)[0]
mean_hd95 = np.mean(metric_list, axis=0)[1]
writer.add_scalar('info/val_mean_dice', performance, iter_num)
writer.add_scalar('info/val_mean_hd95', mean_hd95, iter_num)
if performance > best_performance:
best_performance = performance
save_mode_path = os.path.join(
snapshot_path, 'iter_{}_dice_{}.pth'.format(
iter_num, round(best_performance, 4)))
save_best = os.path.join(
snapshot_path, '{}_best_model.pth'.format(args.model))
torch.save(model.state_dict(), save_mode_path)
torch.save(model.state_dict(), save_best)
logging.info('iteration %d : mean_dice : %f mean_hd95 : %f' %
(iter_num, performance, mean_hd95))
model.train()
if iter_num % 3000 == 0:
save_mode_path = os.path.join(snapshot_path,
'iter_' + str(iter_num) + '.pth')
torch.save(model.state_dict(), save_mode_path)
logging.info("save model to {}".format(save_mode_path))
if iter_num >= max_iterations:
break
if iter_num >= max_iterations:
iterator.close()
break
writer.close()
return "Training Finished!"
def train(args, snapshot_path):
base_lr = args.base_lr
num_classes = args.num_classes
batch_size = args.batch_size
max_iterations = args.max_iterations
model = net_factory(net_type=args.model, in_chns=1, class_num=num_classes)
db_train = BaseDataSets(base_dir=args.root_path,
split="train",
transform=transforms.Compose(
[RandomGenerator(args.patch_size)]),
fold=args.fold,
sup_type=args.sup_type)
db_val = BaseDataSets(base_dir=args.root_path, split="val")
def worker_init_fn(worker_id):
random.seed(args.seed + worker_id)
trainloader = DataLoader(db_train,
batch_size=batch_size,
shuffle=True,
num_workers=8,
pin_memory=True,
worker_init_fn=worker_init_fn)
valloader = DataLoader(db_val, batch_size=1, shuffle=False, num_workers=1)
model.train()
optimizer = optim.SGD(model.parameters(),
lr=base_lr,
momentum=0.9,
weight_decay=0.0001)
ce_loss = CrossEntropyLoss(ignore_index=4)
dice_loss = losses.DiceLoss(num_classes)
gatecrf_loss = ModelLossSemsegGatedCRF()
writer = SummaryWriter(snapshot_path + '/log')
logging.info("{} iterations per epoch".format(len(trainloader)))
iter_num = 0
max_epoch = max_iterations // len(trainloader) + 1
best_performance = 0.0
iterator = tqdm(range(max_epoch), ncols=70)
loss_gatedcrf_kernels_desc = [{"weight": 1, "xy": 6, "rgb": 0.1}]
loss_gatedcrf_radius = 5
for epoch_num in iterator:
for i_batch, sampled_batch in enumerate(trainloader):
volume_batch, label_batch = sampled_batch['image'], sampled_batch[
'label']
volume_batch, label_batch = volume_batch.cuda(), label_batch.cuda()
outputs = model(volume_batch)
outputs_soft = torch.softmax(outputs, dim=1)
loss_ce = ce_loss(outputs, label_batch[:].long())
out_gatedcrf = gatecrf_loss(
outputs_soft,
loss_gatedcrf_kernels_desc,
loss_gatedcrf_radius,
volume_batch,
256,
256,
)["loss"]
loss = loss_ce + 0.1 * out_gatedcrf
optimizer.zero_grad()
loss.backward()
optimizer.step()
lr_ = base_lr * (1.0 - iter_num / max_iterations)**0.9
for param_group in optimizer.param_groups:
param_group['lr'] = lr_
iter_num = iter_num + 1
writer.add_scalar('info/lr', lr_, iter_num)
writer.add_scalar('info/total_loss', loss, iter_num)
writer.add_scalar('info/loss_ce', loss_ce, iter_num)
writer.add_scalar('info/out_gatedcrf', out_gatedcrf, iter_num)
logging.info('iteration %d : loss : %f, loss_ce: %f' %
(iter_num, loss.item(), loss_ce.item()))
if iter_num % 20 == 0:
image = volume_batch[1, 0:1, :, :]
image = (image - image.min()) / (image.max() - image.min())
writer.add_image('train/Image', image, iter_num)
outputs = torch.argmax(torch.softmax(outputs, dim=1),
dim=1,
keepdim=True)
writer.add_image('train/Prediction', outputs[1, ...] * 50,
iter_num)
labs = label_batch[1, ...].unsqueeze(0) * 50
writer.add_image('train/GroundTruth', labs, iter_num)
if iter_num > 0 and iter_num % 200 == 0:
model.eval()
metric_list = 0.0
for i_batch, sampled_batch in enumerate(valloader):
metric_i = test_single_volume(sampled_batch["image"],
sampled_batch["label"],
model,
classes=num_classes)
metric_list += np.array(metric_i)
metric_list = metric_list / len(db_val)
for class_i in range(num_classes - 1):
writer.add_scalar('info/val_{}_dice'.format(class_i + 1),
metric_list[class_i, 0], iter_num)
writer.add_scalar('info/val_{}_hd95'.format(class_i + 1),
metric_list[class_i, 1], iter_num)
performance = np.mean(metric_list, axis=0)[0]
mean_hd95 = np.mean(metric_list, axis=0)[1]
writer.add_scalar('info/val_mean_dice', performance, iter_num)
writer.add_scalar('info/val_mean_hd95', mean_hd95, iter_num)
if performance > best_performance:
best_performance = performance
save_mode_path = os.path.join(
snapshot_path, 'iter_{}_dice_{}.pth'.format(
iter_num, round(best_performance, 4)))
save_best = os.path.join(
snapshot_path, '{}_best_model.pth'.format(args.model))
torch.save(model.state_dict(), save_mode_path)
torch.save(model.state_dict(), save_best)
logging.info('iteration %d : mean_dice : %f mean_hd95 : %f' %
(iter_num, performance, mean_hd95))
model.train()
if iter_num % 3000 == 0:
save_mode_path = os.path.join(snapshot_path,
'iter_' + str(iter_num) + '.pth')
torch.save(model.state_dict(), save_mode_path)
logging.info("save model to {}".format(save_mode_path))
if iter_num >= max_iterations:
break
if iter_num >= max_iterations:
iterator.close()
break
writer.close()
return "Training Finished!"
def train(args, snapshot_path):
base_lr = args.base_lr
num_classes = args.num_classes
batch_size = args.batch_size
max_iterations = args.max_iterations
def create_model(ema=False):
# Network definition
model = net_factory(net_type=args.model,
in_chns=1,
class_num=num_classes)
if ema:
for param in model.parameters():
param.detach_()
return model
model = create_model()
ema_model = create_model(ema=True)
def worker_init_fn(worker_id):
random.seed(args.seed + worker_id)
db_train = BaseDataSets(base_dir=args.root_path,
split="train",
num=None,
transform=transforms.Compose(
[RandomGenerator(args.patch_size)]))
db_val = BaseDataSets(base_dir=args.root_path, split="val")
total_slices = len(db_train)
labeled_slice = patients_to_slices(args.root_path, args.labeled_num)
print("Total silices is: {}, labeled slices is: {}".format(
total_slices, labeled_slice))
labeled_idxs = list(range(0, labeled_slice))
unlabeled_idxs = list(range(labeled_slice, total_slices))
batch_sampler = TwoStreamBatchSampler(labeled_idxs, unlabeled_idxs,
batch_size,
batch_size - args.labeled_bs)
trainloader = DataLoader(db_train,
batch_sampler=batch_sampler,
num_workers=4,
pin_memory=True,
worker_init_fn=worker_init_fn)
model.train()
valloader = DataLoader(db_val, batch_size=1, shuffle=False, num_workers=1)
optimizer = optim.SGD(model.parameters(),
lr=base_lr,
momentum=0.9,
weight_decay=0.0001)
ce_loss = CrossEntropyLoss()
dice_loss = losses.DiceLoss(num_classes)
writer = SummaryWriter(snapshot_path + '/log')
logging.info("{} iterations per epoch".format(len(trainloader)))
iter_num = 0
max_epoch = max_iterations // len(trainloader) + 1
best_performance = 0.0
iterator = tqdm(range(max_epoch), ncols=70)
for epoch_num in iterator:
for i_batch, sampled_batch in enumerate(trainloader):
volume_batch, label_batch = sampled_batch['image'], sampled_batch[
'label']
volume_batch, label_batch = volume_batch.cuda(), label_batch.cuda()
unlabeled_volume_batch = volume_batch[args.labeled_bs:]
noise = torch.clamp(
torch.randn_like(unlabeled_volume_batch) * 0.1, -0.2, 0.2)
ema_inputs = unlabeled_volume_batch + noise
outputs = model(volume_batch)
outputs_soft = torch.softmax(outputs, dim=1)
with torch.no_grad():
ema_output = ema_model(ema_inputs)
T = 8
_, _, w, h = unlabeled_volume_batch.shape
volume_batch_r = unlabeled_volume_batch.repeat(2, 1, 1, 1)
stride = volume_batch_r.shape[0] // 2
preds = torch.zeros([stride * T, num_classes, w, h]).cuda()
for i in range(T // 2):
ema_inputs = volume_batch_r + \
torch.clamp(torch.randn_like(
volume_batch_r) * 0.1, -0.2, 0.2)
with torch.no_grad():
preds[2 * stride * i:2 * stride *
(i + 1)] = ema_model(ema_inputs)
preds = F.softmax(preds, dim=1)
preds = preds.reshape(T, stride, num_classes, w, h)
preds = torch.mean(preds, dim=0)
uncertainty = -1.0 * \
torch.sum(preds*torch.log(preds + 1e-6), dim=1, keepdim=True)
loss_ce = ce_loss(outputs[:args.labeled_bs],
label_batch[:args.labeled_bs][:].long())
loss_dice = dice_loss(outputs_soft[:args.labeled_bs],
label_batch[:args.labeled_bs].unsqueeze(1))
supervised_loss = 0.5 * (loss_dice + loss_ce)
consistency_weight = get_current_consistency_weight(iter_num //
150)
consistency_dist = losses.softmax_mse_loss(
outputs[args.labeled_bs:],
ema_output) # (batch, 2, 112,112,80)
threshold = (0.75 + 0.25 * ramps.sigmoid_rampup(
iter_num, max_iterations)) * np.log(2)
mask = (uncertainty < threshold).float()
consistency_loss = torch.sum(
mask * consistency_dist) / (2 * torch.sum(mask) + 1e-16)
loss = supervised_loss + consistency_weight * consistency_loss
optimizer.zero_grad()
loss.backward()
optimizer.step()
update_ema_variables(model, ema_model, args.ema_decay, iter_num)
lr_ = base_lr * (1.0 - iter_num / max_iterations)**0.9
for param_group in optimizer.param_groups:
param_group['lr'] = lr_
iter_num = iter_num + 1
writer.add_scalar('info/lr', lr_, iter_num)
writer.add_scalar('info/total_loss', loss, iter_num)
writer.add_scalar('info/loss_ce', loss_ce, iter_num)
writer.add_scalar('info/loss_dice', loss_dice, iter_num)
writer.add_scalar('info/consistency_loss', consistency_loss,
iter_num)
writer.add_scalar('info/consistency_weight', consistency_weight,
iter_num)
logging.info(
'iteration %d : loss : %f, loss_ce: %f, loss_dice: %f' %
(iter_num, loss.item(), loss_ce.item(), loss_dice.item()))
if iter_num % 20 == 0:
image = volume_batch[1, 0:1, :, :]
writer.add_image('train/Image', image, iter_num)
outputs = torch.argmax(torch.softmax(outputs, dim=1),
dim=1,
keepdim=True)
writer.add_image('train/Prediction', outputs[1, ...] * 50,
iter_num)
labs = label_batch[1, ...].unsqueeze(0) * 50
writer.add_image('train/GroundTruth', labs, iter_num)
if iter_num > 0 and iter_num % 200 == 0:
model.eval()
metric_list = 0.0
for i_batch, sampled_batch in enumerate(valloader):
metric_i = test_single_volume(sampled_batch["image"],
sampled_batch["label"],
model,
classes=num_classes)
metric_list += np.array(metric_i)
metric_list = metric_list / len(db_val)
for class_i in range(num_classes - 1):
writer.add_scalar('info/val_{}_dice'.format(class_i + 1),
metric_list[class_i, 0], iter_num)
writer.add_scalar('info/val_{}_hd95'.format(class_i + 1),
metric_list[class_i, 1], iter_num)
performance = np.mean(metric_list, axis=0)[0]
mean_hd95 = np.mean(metric_list, axis=0)[1]
writer.add_scalar('info/val_mean_dice', performance, iter_num)
writer.add_scalar('info/val_mean_hd95', mean_hd95, iter_num)
if performance > best_performance:
best_performance = performance
save_mode_path = os.path.join(
snapshot_path, 'iter_{}_dice_{}.pth'.format(
iter_num, round(best_performance, 4)))
save_best = os.path.join(
snapshot_path, '{}_best_model.pth'.format(args.model))
torch.save(model.state_dict(), save_mode_path)
torch.save(model.state_dict(), save_best)
logging.info('iteration %d : mean_dice : %f mean_hd95 : %f' %
(iter_num, performance, mean_hd95))
model.train()
if iter_num % 3000 == 0:
save_mode_path = os.path.join(snapshot_path,
'iter_' + str(iter_num) + '.pth')
torch.save(model.state_dict(), save_mode_path)
logging.info("save model to {}".format(save_mode_path))
if iter_num >= max_iterations:
break
if iter_num >= max_iterations:
iterator.close()
break
writer.close()
return "Training Finished!"
def train(args, snapshot_path):
base_lr = args.base_lr
num_classes = 4
batch_size = args.batch_size
max_iterations = args.max_iterations
def worker_init_fn(worker_id):
random.seed(args.seed + worker_id)
model = UNet('efficientnet-b3',
encoder_weights='imagenet',
in_channels=1,
classes=num_classes).cuda()
DAN = FCDiscriminator(num_classes=num_classes)
DAN = DAN.cuda()
db_train = ACDC(base_dir=args.root_path,
split="train",
num=None,
transform=transforms.Compose(
[RandomGenerator(args.patch_size)]))
labeled_idxs = list(range(0, args.labeled_num))
unlabeled_idxs = list(range(args.labeled_num, 1312))
batch_sampler = TwoStreamBatchSampler(labeled_idxs, unlabeled_idxs,
batch_size,
batch_size - args.labeled_bs)
trainloader = DataLoader(db_train,
batch_sampler=batch_sampler,
num_workers=16,
pin_memory=True,
worker_init_fn=worker_init_fn)
db_val = ACDC(base_dir=args.root_path, split="val")
valloader = DataLoader(db_val, batch_size=1, shuffle=False, num_workers=1)
model.train()
optimizer = optim.SGD(model.parameters(),
lr=base_lr,
momentum=0.9,
weight_decay=0.0001)
DAN_optimizer = optim.Adam(DAN.parameters(),
lr=args.DAN_lr,
betas=(0.9, 0.99))
ce_loss = CrossEntropyLoss()
dice_loss = losses.DiceLoss(num_classes)
writer = SummaryWriter(snapshot_path + '/log')
logging.info("{} iterations per epoch".format(len(trainloader)))
iter_num = 0
max_epoch = max_iterations // len(trainloader) + 1
best_performance = 0.0
iterator = tqdm(range(max_epoch), ncols=70)
for epoch_num in iterator:
for i_batch, sampled_batch in enumerate(trainloader):
volume_batch, label_batch = sampled_batch['image'], sampled_batch[
'label']
volume_batch, label_batch = volume_batch.cuda(), label_batch.cuda()
DAN_target = torch.tensor([0] * args.batch_size).cuda()
DAN_target[:args.labeled_bs] = 1
model.train()
DAN.eval()
outputs = model(volume_batch)
outputs_soft = torch.softmax(outputs, dim=1)
loss_ce = ce_loss(outputs[:args.labeled_bs],
label_batch[:][:args.labeled_bs].long())
loss_dice = dice_loss(outputs_soft[:args.labeled_bs],
label_batch[:args.labeled_bs].unsqueeze(1))
supervised_loss = 0.5 * (loss_dice + loss_ce)
consistency_weight = get_current_consistency_weight(iter_num //
150)
DAN_outputs = DAN(outputs_soft[args.labeled_bs:],
volume_batch[args.labeled_bs:])
consistency_loss = F.cross_entropy(
DAN_outputs, (DAN_target[:args.labeled_bs]).long())
loss = supervised_loss + consistency_weight * consistency_loss
optimizer.zero_grad()
loss.backward()
optimizer.step()
model.eval()
DAN.train()
with torch.no_grad():
outputs = model(volume_batch)
outputs_soft = torch.softmax(outputs, dim=1)
DAN_outputs = DAN(outputs_soft, volume_batch)
DAN_loss = F.cross_entropy(DAN_outputs, DAN_target.long())
DAN_optimizer.zero_grad()
DAN_loss.backward()
DAN_optimizer.step()
lr_ = base_lr * (1.0 - iter_num / max_iterations)**0.9
for param_group in optimizer.param_groups:
param_group['lr'] = lr_
iter_num = iter_num + 1
writer.add_scalar('info/lr', lr_, iter_num)
writer.add_scalar('info/total_loss', loss, iter_num)
writer.add_scalar('info/loss_ce', loss_ce, iter_num)
writer.add_scalar('info/loss_dice', loss_dice, iter_num)
writer.add_scalar('info/consistency_loss', consistency_loss,
iter_num)
writer.add_scalar('info/consistency_weight', consistency_weight,
iter_num)
logging.info(
'iteration %d : loss : %f, loss_ce: %f, loss_dice: %f' %
(iter_num, loss.item(), loss_ce.item(), loss_dice.item()))
if iter_num % 20 == 0:
image = volume_batch[1, 0:1, :, :]
writer.add_image('train/Image', image, iter_num)
outputs = torch.argmax(torch.softmax(outputs, dim=1),
dim=1,
keepdim=True)
writer.add_image('train/Prediction', outputs[1, ...] * 50,
iter_num)
labs = label_batch[1, ...].unsqueeze(0) * 50
writer.add_image('train/GroundTruth', labs, iter_num)
if iter_num > 0 and iter_num % 200 == 0:
model.eval()
first_total, second_total, third_total = 0.0, 0.0, 0.0
for i_batch, sampled_batch in enumerate(valloader):
first, second, third = test_single_volume(
sampled_batch["image"], sampled_batch["label"], model)
first_total += np.asarray(first)
second_total += np.asarray(second)
third_total += np.asarray(third)
first_total, second_total, third_total = first_total / \
len(db_val), second_total / \
len(db_val), third_total/len(db_val)
writer.add_scalar('info/val_one_dice', first_total[0],
iter_num)
writer.add_scalar('info/val_one_hd95', first_total[1],
iter_num)
writer.add_scalar('info/val_two_dice', second_total[0],
iter_num)
writer.add_scalar('info/val_two_hd95', second_total[1],
iter_num)
writer.add_scalar('info/val_three_dice', third_total[0],
iter_num)
writer.add_scalar('info/val_three_hd95', third_total[1],
iter_num)
performance = (first_total[0] + second_total[0] +
third_total[0]) / 3
mean_hd95 = (first_total[1] + second_total[1] +
third_total[1]) / 3
writer.add_scalar('info/val_mean_dice', performance, iter_num)
writer.add_scalar('info/val_mean_hd95', mean_hd95, iter_num)
if performance > best_performance:
best_performance = performance
save_mode_path = os.path.join(
snapshot_path, 'iter_{}_dice_{}.pth'.format(
iter_num, round(best_performance, 4)))
save_best = os.path.join(
snapshot_path, '{}_best_model.pth'.format(args.model))
torch.save(model.state_dict(), save_mode_path)
torch.save(model.state_dict(), save_best)
logging.info('iteration %d : mean_dice : %f mean_hd95 : %f' %
(iter_num, performance, mean_hd95))
model.train()
if iter_num % 3000 == 0:
save_mode_path = os.path.join(snapshot_path,
'iter_' + str(iter_num) + '.pth')
torch.save(model.state_dict(), save_mode_path)
logging.info("save model to {}".format(save_mode_path))
if iter_num >= max_iterations:
break
if iter_num >= max_iterations:
iterator.close()
break
writer.close()
return "Training Finished!"
def train(args, snapshot_path):
num_classes = 2
base_lr = args.base_lr
train_data_path = args.root_path
batch_size = args.batch_size
max_iterations = args.max_iterations
net = unet_3D(n_classes=num_classes, in_channels=1)
model = net.cuda()
DAN = FC3DDiscriminator(num_classes=num_classes)
DAN = DAN.cuda()
db_train = BraTS2019(base_dir=train_data_path,
split='train',
num=None,
transform=transforms.Compose([
RandomRotFlip(),
RandomCrop(args.patch_size),
ToTensor(),
]))
def worker_init_fn(worker_id):
random.seed(args.seed + worker_id)
labeled_idxs = list(range(0, args.labeled_num))
unlabeled_idxs = list(range(args.labeled_num, 250))
batch_sampler = TwoStreamBatchSampler(labeled_idxs, unlabeled_idxs,
batch_size,
batch_size - args.labeled_bs)
trainloader = DataLoader(db_train,
batch_sampler=batch_sampler,
num_workers=4,
pin_memory=True,
worker_init_fn=worker_init_fn)
model.train()
optimizer = optim.SGD(model.parameters(),
lr=base_lr,
momentum=0.9,
weight_decay=0.0001)
DAN_optimizer = optim.Adam(DAN.parameters(),
lr=args.DAN_lr,
betas=(0.9, 0.99))
ce_loss = CrossEntropyLoss()
dice_loss = losses.DiceLoss(2)
writer = SummaryWriter(snapshot_path + '/log')
logging.info("{} iterations per epoch".format(len(trainloader)))
iter_num = 0
max_epoch = max_iterations // len(trainloader) + 1
best_performance = 0.0
iterator = tqdm(range(max_epoch), ncols=70)
for epoch_num in iterator:
for i_batch, sampled_batch in enumerate(trainloader):
volume_batch, label_batch = sampled_batch['image'], sampled_batch[
'label']
volume_batch, label_batch = volume_batch.cuda(), label_batch.cuda()
DAN_target = torch.tensor([1, 1, 0, 0]).cuda()
model.train()
DAN.eval()
outputs = model(volume_batch)
outputs_soft = torch.softmax(outputs, dim=1)
loss_ce = ce_loss(outputs, label_batch[:])
loss_dice = dice_loss(outputs_soft, label_batch.unsqueeze(1))
supervised_loss = 0.5 * (loss_dice + loss_ce)
consistency_weight = get_current_consistency_weight(iter_num //
150)
DAN_outputs = DAN(outputs_soft[args.labeled_bs:],
volume_batch[args.labeled_bs:])
consistency_loss = F.cross_entropy(
DAN_outputs, (DAN_target[:args.labeled_bs]).long())
loss = supervised_loss + consistency_weight * consistency_loss
optimizer.zero_grad()
loss.backward()
optimizer.step()
model.eval()
DAN.train()
with torch.no_grad():
outputs = model(volume_batch)
outputs_soft = torch.softmax(outputs, dim=1)
DAN_outputs = DAN(outputs_soft, volume_batch)
DAN_loss = F.cross_entropy(DAN_outputs, DAN_target.long())
DAN_optimizer.zero_grad()
DAN_loss.backward()
DAN_optimizer.step()
lr_ = base_lr * (1.0 - iter_num / max_iterations)**0.9
for param_group in optimizer.param_groups:
param_group['lr'] = lr_
iter_num = iter_num + 1
writer.add_scalar('info/lr', lr_, iter_num)
writer.add_scalar('info/total_loss', loss, iter_num)
writer.add_scalar('info/loss_ce', loss_ce, iter_num)
writer.add_scalar('info/loss_dice', loss_dice, iter_num)
writer.add_scalar('info/consistency_loss', consistency_loss,
iter_num)
writer.add_scalar('info/consistency_weight', consistency_weight,
iter_num)
logging.info(
'iteration %d : loss : %f, loss_ce: %f, loss_dice: %f' %
(iter_num, loss.item(), loss_ce.item(), loss_dice.item()))
if iter_num % 20 == 0:
image = volume_batch[0, 0:1, :, :,
20:61:10].permute(3, 0, 1,
2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=True)
writer.add_image('train/Image', grid_image, iter_num)
image = outputs_soft[0, 1:2, :, :,
20:61:10].permute(3, 0, 1,
2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=False)
writer.add_image('train/Predicted_label', grid_image, iter_num)
image = label_batch[0, :, :, 20:61:10].unsqueeze(0).permute(
3, 0, 1, 2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=False)
writer.add_image('train/Groundtruth_label', grid_image,
iter_num)
if iter_num > 0 and iter_num % 200 == 0:
model.eval()
avg_metric = test_all_case(model,
args.root_path,
test_list="val.txt",
num_classes=2,
patch_size=args.patch_size,
stride_xy=64,
stride_z=64)
if avg_metric[:, 0].mean() > best_performance:
best_performance = avg_metric[:, 0].mean()
save_mode_path = os.path.join(
snapshot_path, 'iter_{}_dice_{}.pth'.format(
iter_num, round(best_performance, 4)))
save_best = os.path.join(
snapshot_path, '{}_best_model.pth'.format(args.model))
torch.save(model.state_dict(), save_mode_path)
torch.save(model.state_dict(), save_best)
writer.add_scalar('info/val_dice_score', avg_metric[0, 0],
iter_num)
writer.add_scalar('info/val_hd95', avg_metric[0, 1], iter_num)
logging.info('iteration %d : dice_score : %f hd95 : %f' %
(iter_num, avg_metric[0, 0].mean(),
avg_metric[0, 1].mean()))
model.train()
if iter_num % 3000 == 0:
save_mode_path = os.path.join(snapshot_path,
'iter_' + str(iter_num) + '.pth')
torch.save(model.state_dict(), save_mode_path)
logging.info("save model to {}".format(save_mode_path))
if iter_num >= max_iterations:
break
if iter_num >= max_iterations:
iterator.close()
break
writer.close()
return "Training Finished!"
def train(args, snapshot_path):
base_lr = args.base_lr
train_data_path = args.root_path
batch_size = args.batch_size
max_iterations = args.max_iterations
num_classes = 2
def create_model(ema=False):
# Network definition
net = net_factory_3d(net_type=args.model,
in_chns=1,
class_num=num_classes)
model = net.cuda()
if ema:
for param in model.parameters():
param.detach_()
return model
model = create_model()
ema_model = create_model(ema=True)
db_train = BraTS2019(base_dir=train_data_path,
split='train',
num=None,
transform=transforms.Compose([
RandomRotFlip(),
RandomCrop(args.patch_size),
ToTensor(),
]))
def worker_init_fn(worker_id):
random.seed(args.seed + worker_id)
labeled_idxs = list(range(0, args.labeled_num))
unlabeled_idxs = list(range(args.labeled_num, 250))
batch_sampler = TwoStreamBatchSampler(labeled_idxs, unlabeled_idxs,
batch_size,
batch_size - args.labeled_bs)
trainloader = DataLoader(db_train,
batch_sampler=batch_sampler,
num_workers=4,
pin_memory=True,
worker_init_fn=worker_init_fn)
model.train()
ema_model.train()
optimizer = optim.SGD(model.parameters(),
lr=base_lr,
momentum=0.9,
weight_decay=0.0001)
ce_loss = CrossEntropyLoss()
dice_loss = losses.DiceLoss(2)
writer = SummaryWriter(snapshot_path + '/log')
logging.info("{} iterations per epoch".format(len(trainloader)))
iter_num = 0
max_epoch = max_iterations // len(trainloader) + 1
best_performance = 0.0
iterator = tqdm(range(max_epoch), ncols=70)
for epoch_num in iterator:
for i_batch, sampled_batch in enumerate(trainloader):
volume_batch, label_batch = sampled_batch['image'], sampled_batch[
'label']
volume_batch, label_batch = volume_batch.cuda(), label_batch.cuda()
unlabeled_volume_batch = volume_batch[args.labeled_bs:]
noise = torch.clamp(
torch.randn_like(unlabeled_volume_batch) * 0.1, -0.2, 0.2)
ema_inputs = unlabeled_volume_batch + noise
outputs = model(volume_batch)
outputs_soft = torch.softmax(outputs, dim=1)
with torch.no_grad():
ema_output = ema_model(ema_inputs)
T = 8
_, _, d, w, h = unlabeled_volume_batch.shape
volume_batch_r = unlabeled_volume_batch.repeat(2, 1, 1, 1, 1)
stride = volume_batch_r.shape[0] // 2
preds = torch.zeros([stride * T, 2, d, w, h]).cuda()
for i in range(T // 2):
ema_inputs = volume_batch_r + \
torch.clamp(torch.randn_like(
volume_batch_r) * 0.1, -0.2, 0.2)
with torch.no_grad():
preds[2 * stride * i:2 * stride *
(i + 1)] = ema_model(ema_inputs)
preds = torch.softmax(preds, dim=1)
preds = preds.reshape(T, stride, 2, d, w, h)
preds = torch.mean(preds, dim=0)
uncertainty = -1.0 * \
torch.sum(preds*torch.log(preds + 1e-6), dim=1, keepdim=True)
loss_ce = ce_loss(outputs[:args.labeled_bs],
label_batch[:args.labeled_bs][:])
loss_dice = dice_loss(outputs_soft[:args.labeled_bs],
label_batch[:args.labeled_bs].unsqueeze(1))
supervised_loss = 0.5 * (loss_dice + loss_ce)
consistency_weight = get_current_consistency_weight(iter_num //
150)
consistency_dist = losses.softmax_mse_loss(
outputs[args.labeled_bs:],
ema_output) # (batch, 2, 112,112,80)
threshold = (0.75 + 0.25 * ramps.sigmoid_rampup(
iter_num, max_iterations)) * np.log(2)
mask = (uncertainty < threshold).float()
consistency_loss = torch.sum(
mask * consistency_dist) / (2 * torch.sum(mask) + 1e-16)
loss = supervised_loss + consistency_weight * consistency_loss
optimizer.zero_grad()
loss.backward()
optimizer.step()
update_ema_variables(model, ema_model, args.ema_decay, iter_num)
lr_ = base_lr * (1.0 - iter_num / max_iterations)**0.9
for param_group in optimizer.param_groups:
param_group['lr'] = lr_
iter_num = iter_num + 1
writer.add_scalar('info/lr', lr_, iter_num)
writer.add_scalar('info/total_loss', loss, iter_num)
writer.add_scalar('info/loss_ce', loss_ce, iter_num)
writer.add_scalar('info/loss_dice', loss_dice, iter_num)
writer.add_scalar('info/consistency_loss', consistency_loss,
iter_num)
writer.add_scalar('info/consistency_weight', consistency_weight,
iter_num)
logging.info(
'iteration %d : loss : %f, loss_ce: %f, loss_dice: %f' %
(iter_num, loss.item(), loss_ce.item(), loss_dice.item()))
writer.add_scalar('loss/loss', loss, iter_num)
if iter_num % 20 == 0:
image = volume_batch[0, 0:1, :, :,
20:61:10].permute(3, 0, 1,
2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=True)
writer.add_image('train/Image', grid_image, iter_num)
image = outputs_soft[0, 1:2, :, :,
20:61:10].permute(3, 0, 1,
2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=False)
writer.add_image('train/Predicted_label', grid_image, iter_num)
image = label_batch[0, :, :, 20:61:10].unsqueeze(0).permute(
3, 0, 1, 2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=False)
writer.add_image('train/Groundtruth_label', grid_image,
iter_num)
if iter_num > 0 and iter_num % 200 == 0:
model.eval()
avg_metric = test_all_case(model,
args.root_path,
test_list="val.txt",
num_classes=2,
patch_size=args.patch_size,
stride_xy=64,
stride_z=64)
if avg_metric[:, 0].mean() > best_performance:
best_performance = avg_metric[:, 0].mean()
save_mode_path = os.path.join(
snapshot_path, 'iter_{}_dice_{}.pth'.format(
iter_num, round(best_performance, 4)))
save_best = os.path.join(
snapshot_path, '{}_best_model.pth'.format(args.model))
torch.save(model.state_dict(), save_mode_path)
torch.save(model.state_dict(), save_best)
writer.add_scalar('info/val_dice_score', avg_metric[0, 0],
iter_num)
writer.add_scalar('info/val_hd95', avg_metric[0, 1], iter_num)
logging.info('iteration %d : dice_score : %f hd95 : %f' %
(iter_num, avg_metric[0, 0].mean(),
avg_metric[0, 1].mean()))
model.train()
if iter_num % 3000 == 0:
save_mode_path = os.path.join(snapshot_path,
'iter_' + str(iter_num) + '.pth')
torch.save(model.state_dict(), save_mode_path)
logging.info("save model to {}".format(save_mode_path))
if iter_num >= max_iterations:
break
if iter_num >= max_iterations:
iterator.close()
break
writer.close()
return "Training Finished!"
def train(args, snapshot_path):
num_classes = 3
base_lr = args.base_lr
train_data_path = args.root_path
batch_size = args.batch_size
max_iterations = args.max_iterations
net = unet_3D_dv_semi(n_classes=num_classes, in_channels=1)
model = net.cuda()
db_train = BraTS2019(base_dir=train_data_path,
split='train',
num=None,
transform=transforms.Compose([
RandomRotFlip(),
RandomCrop(args.patch_size),
ToTensor(),
]))
def worker_init_fn(worker_id):
random.seed(args.seed + worker_id)
labeled_idxs = list(range(0, args.labeled_num))
unlabeled_idxs = list(range(args.labeled_num, args.total_labeled_num))
batch_sampler = TwoStreamBatchSampler(labeled_idxs, unlabeled_idxs,
batch_size,
batch_size - args.labeled_bs)
trainloader = DataLoader(db_train,
batch_sampler=batch_sampler,
num_workers=4,
pin_memory=True,
worker_init_fn=worker_init_fn)
model.train()
optimizer = optim.SGD(model.parameters(),
lr=base_lr,
momentum=0.9,
weight_decay=0.0001)
ce_loss = CrossEntropyLoss()
dice_loss = losses.DiceLoss(num_classes)
writer = SummaryWriter(snapshot_path + '/log')
logging.info("{} iterations per epoch".format(len(trainloader)))
iter_num = 0
max_epoch = max_iterations // len(trainloader) + 1
best_performance = 0.0
iterator = tqdm(range(max_epoch), ncols=70)
kl_distance = nn.KLDivLoss(reduction='none')
for epoch_num in iterator:
for i_batch, sampled_batch in enumerate(trainloader):
volume_batch, label_batch = sampled_batch['image'], sampled_batch[
'label']
volume_batch, label_batch = volume_batch.cuda(), label_batch.cuda()
unlabeled_volume_batch = volume_batch[args.labeled_bs:]
outputs_aux1, outputs_aux2, outputs_aux3, outputs_aux4, = model(
volume_batch)
outputs_aux1_soft = torch.softmax(outputs_aux1, dim=1)
outputs_aux2_soft = torch.softmax(outputs_aux2, dim=1)
outputs_aux3_soft = torch.softmax(outputs_aux3, dim=1)
outputs_aux4_soft = torch.softmax(outputs_aux4, dim=1)
loss_ce_aux1 = ce_loss(outputs_aux1[:args.labeled_bs],
label_batch[:args.labeled_bs])
loss_ce_aux2 = ce_loss(outputs_aux2[:args.labeled_bs],
label_batch[:args.labeled_bs])
loss_ce_aux3 = ce_loss(outputs_aux3[:args.labeled_bs],
label_batch[:args.labeled_bs])
loss_ce_aux4 = ce_loss(outputs_aux4[:args.labeled_bs],
label_batch[:args.labeled_bs])
loss_dice_aux1 = dice_loss(
outputs_aux1_soft[:args.labeled_bs],
label_batch[:args.labeled_bs].unsqueeze(1))
loss_dice_aux2 = dice_loss(
outputs_aux2_soft[:args.labeled_bs],
label_batch[:args.labeled_bs].unsqueeze(1))
loss_dice_aux3 = dice_loss(
outputs_aux3_soft[:args.labeled_bs],
label_batch[:args.labeled_bs].unsqueeze(1))
loss_dice_aux4 = dice_loss(
outputs_aux4_soft[:args.labeled_bs],
label_batch[:args.labeled_bs].unsqueeze(1))
supervised_loss = (loss_ce_aux1 + loss_ce_aux2 + loss_ce_aux3 +
loss_ce_aux4 + loss_dice_aux1 + loss_dice_aux2 +
loss_dice_aux3 + loss_dice_aux4) / 8
preds = (outputs_aux1_soft + outputs_aux2_soft +
outputs_aux3_soft + outputs_aux4_soft) / 4
variance_aux1 = torch.sum(kl_distance(
torch.log(outputs_aux1_soft[args.labeled_bs:]),
preds[args.labeled_bs:]),
dim=1,
keepdim=True)
exp_variance_aux1 = torch.exp(-variance_aux1)
variance_aux2 = torch.sum(kl_distance(
torch.log(outputs_aux2_soft[args.labeled_bs:]),
preds[args.labeled_bs:]),
dim=1,
keepdim=True)
exp_variance_aux2 = torch.exp(-variance_aux2)
variance_aux3 = torch.sum(kl_distance(
torch.log(outputs_aux3_soft[args.labeled_bs:]),
preds[args.labeled_bs:]),
dim=1,
keepdim=True)
exp_variance_aux3 = torch.exp(-variance_aux3)
variance_aux4 = torch.sum(kl_distance(
torch.log(outputs_aux4_soft[args.labeled_bs:]),
preds[args.labeled_bs:]),
dim=1,
keepdim=True)
exp_variance_aux4 = torch.exp(-variance_aux4)
consistency_weight = get_current_consistency_weight(iter_num //
150)
consistency_dist_aux1 = (preds[args.labeled_bs:] -
outputs_aux1_soft[args.labeled_bs:])**2
consistency_loss_aux1 = torch.mean(
consistency_dist_aux1 *
exp_variance_aux1) / (torch.mean(exp_variance_aux1) +
1e-8) + torch.mean(variance_aux1)
consistency_dist_aux2 = (preds[args.labeled_bs:] -
outputs_aux2_soft[args.labeled_bs:])**2
consistency_loss_aux2 = torch.mean(
consistency_dist_aux2 *
exp_variance_aux2) / (torch.mean(exp_variance_aux2) +
1e-8) + torch.mean(variance_aux2)
consistency_dist_aux3 = (preds[args.labeled_bs:] -
outputs_aux3_soft[args.labeled_bs:])**2
consistency_loss_aux3 = torch.mean(
consistency_dist_aux3 *
exp_variance_aux3) / (torch.mean(exp_variance_aux3) +
1e-8) + torch.mean(variance_aux3)
consistency_dist_aux4 = (preds[args.labeled_bs:] -
outputs_aux4_soft[args.labeled_bs:])**2
consistency_loss_aux4 = torch.mean(
consistency_dist_aux4 *
exp_variance_aux4) / (torch.mean(exp_variance_aux4) +
1e-8) + torch.mean(variance_aux4)
consistency_loss = (consistency_loss_aux1 + consistency_loss_aux2 +
consistency_loss_aux3 +
consistency_loss_aux4) / 4
loss = supervised_loss + consistency_weight * consistency_loss
optimizer.zero_grad()
loss.backward()
optimizer.step()
lr_ = base_lr * (1.0 - iter_num / max_iterations)**0.9
for param_group in optimizer.param_groups:
param_group['lr'] = lr_
iter_num = iter_num + 1
writer.add_scalar('info/lr', lr_, iter_num)
writer.add_scalar('info/total_loss', loss, iter_num)
writer.add_scalar('info/supervised_loss', supervised_loss,
iter_num)
writer.add_scalar('info/consistency_loss', consistency_loss,
iter_num)
writer.add_scalar('info/consistency_weight', consistency_weight,
iter_num)
logging.info('iteration %d : loss : %f, supervised_loss: %f' %
(iter_num, loss.item(), supervised_loss.item()))
if iter_num % 20 == 0:
image = volume_batch[0, 0:1, :, :,
20:61:10].permute(3, 0, 1,
2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=True)
writer.add_image('train/Image', grid_image, iter_num)
image = torch.argmax(
outputs_aux1_soft,
dim=1, keepdim=True)[0, 0:1, :, :, 20:61:10].permute(
3, 0, 1, 2).repeat(1, 3, 1, 1) * 100
grid_image = make_grid(image, 5, normalize=False)
writer.add_image('train/Predicted_label', grid_image, iter_num)
image = label_batch[0, :, :, 20:61:10].unsqueeze(0).permute(
3, 0, 1, 2).repeat(1, 3, 1, 1) * 100
grid_image = make_grid(image, 5, normalize=False)
writer.add_image('train/Groundtruth_label', grid_image,
iter_num)
if iter_num > 0 and iter_num % 200 == 0:
model.eval()
avg_metric = test_all_case(model,
args.root_path,
test_list="val.txt",
num_classes=num_classes,
patch_size=args.patch_size,
stride_xy=64,
stride_z=64)
if avg_metric[:, 0].mean() > best_performance:
best_performance = avg_metric[:, 0].mean()
save_mode_path = os.path.join(
snapshot_path, 'iter_{}_dice_{}.pth'.format(
iter_num, round(best_performance, 4)))
save_best = os.path.join(
snapshot_path, '{}_best_model.pth'.format(args.model))
torch.save(model.state_dict(), save_mode_path)
torch.save(model.state_dict(), save_best)
for cls in range(1, num_classes):
writer.add_scalar('info/val_cls_{}_dice_score'.format(cls),
avg_metric[cls - 1, 0], iter_num)
writer.add_scalar('info/val_cls_{}_hd95'.format(cls),
avg_metric[cls - 1, 1], iter_num)
writer.add_scalar('info/val_mean_dice_score',
avg_metric[:, 0].mean(), iter_num)
writer.add_scalar('info/val_mean_hd95',
avg_metric[:, 1].mean(), iter_num)
logging.info('iteration %d : dice_score : %f hd95 : %f' %
(iter_num, avg_metric[:, 0].mean(),
avg_metric[:, 1].mean()))
model.train()
if iter_num % 3000 == 0:
save_mode_path = os.path.join(snapshot_path,
'iter_' + str(iter_num) + '.pth')
torch.save(model.state_dict(), save_mode_path)
logging.info("save model to {}".format(save_mode_path))
if iter_num >= max_iterations:
break
if iter_num >= max_iterations:
iterator.close()
break
writer.close()
return "Training Finished!"
def train(args, snapshot_path):
base_lr = args.base_lr
train_data_path = args.root_path
batch_size = args.batch_size
max_iterations = args.max_iterations
def create_model(ema=False):
# Network definition
net = unet_3D(n_classes=2, in_channels=1)
model = net.cuda()
if ema:
for param in model.parameters():
param.detach_()
return model
model = create_model()
ema_model = create_model(ema=True)
db_train = BraTS2019(base_dir=train_data_path,
split='train',
num=None,
transform=transforms.Compose([
RandomRotFlip(),
RandomCrop(args.patch_size),
ToTensor(),
]))
def worker_init_fn(worker_id):
random.seed(args.seed + worker_id)
labeled_idxs = list(range(0, args.labeled_num))
unlabeled_idxs = list(range(args.labeled_num, args.total_labeled_num))
batch_sampler = TwoStreamBatchSampler(
labeled_idxs, unlabeled_idxs, batch_size, batch_size-args.labeled_bs)
trainloader = DataLoader(db_train, batch_sampler=batch_sampler,
num_workers=4, pin_memory=True, worker_init_fn=worker_init_fn)
model.train()
ema_model.train()
optimizer = optim.SGD(model.parameters(), lr=base_lr,
momentum=0.9, weight_decay=0.0001)
ce_loss = CrossEntropyLoss()
dice_loss = losses.DiceLoss(2)
writer = SummaryWriter(snapshot_path + '/log')
logging.info("{} iterations per epoch".format(len(trainloader)))
iter_num = 0
max_epoch = max_iterations // len(trainloader) + 1
best_performance = 0.0
iterator = tqdm(range(max_epoch), ncols=70)
for epoch_num in iterator:
for i_batch, sampled_batch in enumerate(trainloader):
volume_batch, label_batch = sampled_batch['image'], sampled_batch['label']
volume_batch, label_batch = volume_batch.cuda(), label_batch.cuda()
labeled_volume_batch = volume_batch[:args.labeled_bs]
unlabeled_volume_batch = volume_batch[args.labeled_bs:]
# ICT mix factors
ict_mix_factors = np.random.beta(
args.ict_alpha, args.ict_alpha, size=(args.labeled_bs//2, 1, 1, 1, 1))
ict_mix_factors = torch.tensor(
ict_mix_factors, dtype=torch.float).cuda()
unlabeled_volume_batch_0 = unlabeled_volume_batch[0:1, ...]
unlabeled_volume_batch_1 = unlabeled_volume_batch[1:2, ...]
# Mix images
batch_ux_mixed = unlabeled_volume_batch_0 * \
(1.0 - ict_mix_factors) + \
unlabeled_volume_batch_1 * ict_mix_factors
input_volume_batch = torch.cat(
[labeled_volume_batch, batch_ux_mixed], dim=0)
outputs = model(input_volume_batch)
outputs_soft = torch.softmax(outputs, dim=1)
with torch.no_grad():
ema_output_ux0 = torch.softmax(
ema_model(unlabeled_volume_batch_0), dim=1)
ema_output_ux1 = torch.softmax(
ema_model(unlabeled_volume_batch_1), dim=1)
batch_pred_mixed = ema_output_ux0 * \
(1.0 - ict_mix_factors) + ema_output_ux1 * ict_mix_factors
loss_ce = ce_loss(outputs[:args.labeled_bs],
label_batch[:args.labeled_bs][:])
loss_dice = dice_loss(
outputs_soft[:args.labeled_bs], label_batch[:args.labeled_bs].unsqueeze(1))
supervised_loss = 0.5 * (loss_dice + loss_ce)
consistency_weight = get_current_consistency_weight(iter_num//150)
consistency_loss = torch.mean(
(outputs_soft[args.labeled_bs:] - batch_pred_mixed)**2)
loss = supervised_loss + consistency_weight * consistency_loss
optimizer.zero_grad()
loss.backward()
optimizer.step()
update_ema_variables(model, ema_model, args.ema_decay, iter_num)
lr_ = base_lr * (1.0 - iter_num / max_iterations) ** 0.9
for param_group in optimizer.param_groups:
param_group['lr'] = lr_
iter_num = iter_num + 1
writer.add_scalar('info/lr', lr_, iter_num)
writer.add_scalar('info/total_loss', loss, iter_num)
writer.add_scalar('info/loss_ce', loss_ce, iter_num)
writer.add_scalar('info/loss_dice', loss_dice, iter_num)
writer.add_scalar('info/consistency_loss',
consistency_loss, iter_num)
writer.add_scalar('info/consistency_weight',
consistency_weight, iter_num)
logging.info(
'iteration %d : loss : %f, loss_ce: %f, loss_dice: %f' %
(iter_num, loss.item(), loss_ce.item(), loss_dice.item()))
writer.add_scalar('loss/loss', loss, iter_num)
if iter_num % 20 == 0:
image = volume_batch[0, 0:1, :, :, 20:61:10].permute(
3, 0, 1, 2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=True)
writer.add_image('train/Image', grid_image, iter_num)
image = outputs_soft[0, 1:2, :, :, 20:61:10].permute(
3, 0, 1, 2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=False)
writer.add_image('train/Predicted_label',
grid_image, iter_num)
image = label_batch[0, :, :, 20:61:10].unsqueeze(
0).permute(3, 0, 1, 2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=False)
writer.add_image('train/Groundtruth_label',
grid_image, iter_num)
if iter_num > 0 and iter_num % 200 == 0:
model.eval()
avg_metric = test_all_case(
model, args.root_path, test_list="val.txt", num_classes=2, patch_size=args.patch_size,
stride_xy=32, stride_z=32)
if avg_metric[:, 0].mean() > best_performance:
best_performance = avg_metric[:, 0].mean()
save_mode_path = os.path.join(snapshot_path,
'iter_{}_dice_{}.pth'.format(
iter_num, round(best_performance, 4)))
save_best = os.path.join(snapshot_path,
'{}_best_model.pth'.format(args.model))
torch.save(model.state_dict(), save_mode_path)
torch.save(model.state_dict(), save_best)
writer.add_scalar('info/val_dice_score',
avg_metric[0, 0], iter_num)
writer.add_scalar('info/val_hd95',
avg_metric[0, 1], iter_num)
logging.info(
'iteration %d : dice_score : %f hd95 : %f' % (iter_num, avg_metric[0, 0].mean(), avg_metric[0, 1].mean()))
model.train()
if iter_num % 3000 == 0:
save_mode_path = os.path.join(
snapshot_path, 'iter_' + str(iter_num) + '.pth')
torch.save(model.state_dict(), save_mode_path)
logging.info("save model to {}".format(save_mode_path))
if iter_num >= max_iterations:
break
if iter_num >= max_iterations:
iterator.close()
break
writer.close()
return "Training Finished!"
def train(args, snapshot_path):
base_lr = args.base_lr
train_data_path = args.root_path
batch_size = args.batch_size
max_iterations = args.max_iterations
num_classes = 2
model = net_factory_3d(net_type=args.model, in_chns=1, class_num=num_classes)
db_train = BraTS2019(base_dir=train_data_path,
split='train',
num=args.labeled_num,
transform=transforms.Compose([
RandomRotFlip(),
RandomCrop(args.patch_size),
ToTensor(),
]))
def worker_init_fn(worker_id):
random.seed(args.seed + worker_id)
trainloader = DataLoader(db_train, batch_size=batch_size, shuffle=True,
num_workers=16, pin_memory=True, worker_init_fn=worker_init_fn)
model.train()
optimizer = optim.SGD(model.parameters(), lr=base_lr,
momentum=0.9, weight_decay=0.0001)
ce_loss = CrossEntropyLoss()
dice_loss = losses.DiceLoss(2)
writer = SummaryWriter(snapshot_path + '/log')
logging.info("{} iterations per epoch".format(len(trainloader)))
iter_num = 0
max_epoch = max_iterations // len(trainloader) + 1
best_performance = 0.0
iterator = tqdm(range(max_epoch), ncols=70)
for epoch_num in iterator:
for i_batch, sampled_batch in enumerate(trainloader):
volume_batch, label_batch = sampled_batch['image'], sampled_batch['label']
volume_batch, label_batch = volume_batch.cuda(), label_batch.cuda()
outputs = model(volume_batch)
outputs_soft = torch.softmax(outputs, dim=1)
loss_ce = ce_loss(outputs, label_batch[:])
loss_dice = dice_loss(outputs_soft, label_batch.unsqueeze(1))
loss = 0.5 * (loss_dice + loss_ce)
optimizer.zero_grad()
loss.backward()
optimizer.step()
lr_ = base_lr * (1.0 - iter_num / max_iterations) ** 0.9
for param_group in optimizer.param_groups:
param_group['lr'] = lr_
iter_num = iter_num + 1
writer.add_scalar('info/lr', lr_, iter_num)
writer.add_scalar('info/total_loss', loss, iter_num)
writer.add_scalar('info/loss_ce', loss_ce, iter_num)
writer.add_scalar('info/loss_dice', loss_dice, iter_num)
logging.info(
'iteration %d : loss : %f, loss_ce: %f, loss_dice: %f' %
(iter_num, loss.item(), loss_ce.item(), loss_dice.item()))
writer.add_scalar('loss/loss', loss, iter_num)
if iter_num % 20 == 0:
image = volume_batch[0, 0:1, :, :, 20:61:10].permute(
3, 0, 1, 2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=True)
writer.add_image('train/Image', grid_image, iter_num)
image = outputs_soft[0, 1:2, :, :, 20:61:10].permute(
3, 0, 1, 2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=False)
writer.add_image('train/Predicted_label',
grid_image, iter_num)
image = label_batch[0, :, :, 20:61:10].unsqueeze(
0).permute(3, 0, 1, 2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=False)
writer.add_image('train/Groundtruth_label',
grid_image, iter_num)
if iter_num > 0 and iter_num % 200 == 0:
model.eval()
avg_metric = test_all_case(
model, args.root_path, test_list="val.txt", num_classes=2, patch_size=args.patch_size,
stride_xy=64, stride_z=64)
if avg_metric[:, 0].mean() > best_performance:
best_performance = avg_metric[:, 0].mean()
save_mode_path = os.path.join(snapshot_path,
'iter_{}_dice_{}.pth'.format(
iter_num, round(best_performance, 4)))
save_best = os.path.join(snapshot_path,
'{}_best_model.pth'.format(args.model))
torch.save(model.state_dict(), save_mode_path)
torch.save(model.state_dict(), save_best)
writer.add_scalar('info/val_dice_score',
avg_metric[0, 0], iter_num)
writer.add_scalar('info/val_hd95',
avg_metric[0, 1], iter_num)
logging.info(
'iteration %d : dice_score : %f hd95 : %f' % (iter_num, avg_metric[0, 0].mean(), avg_metric[0, 1].mean()))
model.train()
if iter_num % 3000 == 0:
save_mode_path = os.path.join(
snapshot_path, 'iter_' + str(iter_num) + '.pth')
torch.save(model.state_dict(), save_mode_path)
logging.info("save model to {}".format(save_mode_path))
if iter_num >= max_iterations:
break
if iter_num >= max_iterations:
iterator.close()
break
writer.close()
return "Training Finished!"
from torch import nn
from torch.utils.data import DataLoader, ConcatDataset
from torch.utils.tensorboard import SummaryWriter
from nets.unet import AttentionUNet, UNet
from nets import MODEL_DICT
from utils import losses, metrics
from utils.plot import plot_prediction
from utils.loaders import denormalize, get_datasets
import config
from config import MODEL_KWARGS, PATCH_SIZE, parser as base_parser
LOSSES_DICT = {
"crossentropy": nn.CrossEntropyLoss(),
"dice": losses.DiceLoss(variant='soft'), # we use the soft Dice by default
"iou": losses.soft_iou_loss,
"focal": losses.focal_loss,
"combined": losses.CombinedLoss()
}
parser = argparse.ArgumentParser(parents=[base_parser])
parser.add_argument("--model",
type=str,
choices=list(MODEL_DICT.keys()),
required=True)
parser.add_argument("--loss",
type=str,
choices=list(LOSSES_DICT.keys()),
default="crossentropy")
parser.add_argument("--dataset",
def train(args, snapshot_path):
base_lr = args.base_lr
train_data_path = args.root_path
batch_size = args.batch_size
max_iterations = args.max_iterations
num_classes = 2
net1 = net_factory_3d(net_type=args.model,
in_chns=1,
class_num=num_classes).cuda()
net2 = net_factory_3d(net_type=args.model,
in_chns=1,
class_num=num_classes).cuda()
model1 = kaiming_normal_init_weight(net1)
model2 = xavier_normal_init_weight(net2)
model1.train()
model2.train()
db_train = BraTS2019(base_dir=train_data_path,
split='train',
num=None,
transform=transforms.Compose([
RandomRotFlip(),
RandomCrop(args.patch_size),
ToTensor(),
]))
def worker_init_fn(worker_id):
random.seed(args.seed + worker_id)
labeled_idxs = list(range(0, args.labeled_num))
unlabeled_idxs = list(range(args.labeled_num, 250))
batch_sampler = TwoStreamBatchSampler(labeled_idxs, unlabeled_idxs,
batch_size,
batch_size - args.labeled_bs)
trainloader = DataLoader(db_train,
batch_sampler=batch_sampler,
num_workers=4,
pin_memory=True,
worker_init_fn=worker_init_fn)
optimizer1 = optim.SGD(model1.parameters(),
lr=base_lr,
momentum=0.9,
weight_decay=0.0001)
optimizer2 = optim.SGD(model2.parameters(),
lr=base_lr,
momentum=0.9,
weight_decay=0.0001)
best_performance1 = 0.0
best_performance2 = 0.0
iter_num = 0
ce_loss = CrossEntropyLoss()
dice_loss = losses.DiceLoss(num_classes)
writer = SummaryWriter(snapshot_path + '/log')
logging.info("{} iterations per epoch".format(len(trainloader)))
max_epoch = max_iterations // len(trainloader) + 1
iterator = tqdm(range(max_epoch), ncols=70)
for epoch_num in iterator:
for i_batch, sampled_batch in enumerate(trainloader):
volume_batch, label_batch = sampled_batch['image'], sampled_batch[
'label']
volume_batch, label_batch = volume_batch.cuda(), label_batch.cuda()
outputs1 = model1(volume_batch)
outputs_soft1 = torch.softmax(outputs1, dim=1)
outputs2 = model2(volume_batch)
outputs_soft2 = torch.softmax(outputs2, dim=1)
consistency_weight = get_current_consistency_weight(iter_num //
150)
loss1 = 0.5 * (
ce_loss(outputs1[:args.labeled_bs],
label_batch[:][:args.labeled_bs].long()) +
dice_loss(outputs_soft1[:args.labeled_bs],
label_batch[:args.labeled_bs].unsqueeze(1)))
loss2 = 0.5 * (
ce_loss(outputs2[:args.labeled_bs],
label_batch[:][:args.labeled_bs].long()) +
dice_loss(outputs_soft2[:args.labeled_bs],
label_batch[:args.labeled_bs].unsqueeze(1)))
pseudo_outputs1 = torch.argmax(
outputs_soft1[args.labeled_bs:].detach(), dim=1, keepdim=False)
pseudo_outputs2 = torch.argmax(
outputs_soft2[args.labeled_bs:].detach(), dim=1, keepdim=False)
pseudo_supervision1 = ce_loss(outputs1[args.labeled_bs:],
pseudo_outputs2)
pseudo_supervision2 = ce_loss(outputs2[args.labeled_bs:],
pseudo_outputs1)
model1_loss = loss1 + consistency_weight * pseudo_supervision1
model2_loss = loss2 + consistency_weight * pseudo_supervision2
loss = model1_loss + model2_loss
optimizer1.zero_grad()
optimizer2.zero_grad()
loss.backward()
optimizer1.step()
optimizer2.step()
iter_num = iter_num + 1
lr_ = base_lr * (1.0 - iter_num / max_iterations)**0.9
for param_group1 in optimizer1.param_groups:
param_group1['lr'] = lr_
for param_group2 in optimizer2.param_groups:
param_group2['lr'] = lr_
writer.add_scalar('lr', lr_, iter_num)
writer.add_scalar('consistency_weight/consistency_weight',
consistency_weight, iter_num)
writer.add_scalar('loss/model1_loss', model1_loss, iter_num)
writer.add_scalar('loss/model2_loss', model2_loss, iter_num)
logging.info('iteration %d : model1 loss : %f model2 loss : %f' %
(iter_num, model1_loss.item(), model2_loss.item()))
if iter_num % 50 == 0:
image = volume_batch[0, 0:1, :, :,
20:61:10].permute(3, 0, 1,
2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=True)
writer.add_image('train/Image', grid_image, iter_num)
image = outputs_soft1[0, 0:1, :, :,
20:61:10].permute(3, 0, 1,
2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=False)
writer.add_image('train/Model1_Predicted_label', grid_image,
iter_num)
image = outputs_soft2[0, 0:1, :, :,
20:61:10].permute(3, 0, 1,
2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=False)
writer.add_image('train/Model2_Predicted_label', grid_image,
iter_num)
image = label_batch[0, :, :, 20:61:10].unsqueeze(0).permute(
3, 0, 1, 2).repeat(1, 3, 1, 1)
grid_image = make_grid(image, 5, normalize=False)
writer.add_image('train/Groundtruth_label', grid_image,
iter_num)
if iter_num > 0 and iter_num % 200 == 0:
model1.eval()
avg_metric1 = test_all_case(model1,
args.root_path,
test_list="val.txt",
num_classes=2,
patch_size=args.patch_size,
stride_xy=64,
stride_z=64)
if avg_metric1[:, 0].mean() > best_performance1:
best_performance1 = avg_metric1[:, 0].mean()
save_mode_path = os.path.join(
snapshot_path, 'model1_iter_{}_dice_{}.pth'.format(
iter_num, round(best_performance1, 4)))
save_best = os.path.join(
snapshot_path, '{}_best_model1.pth'.format(args.model))
torch.save(model1.state_dict(), save_mode_path)
torch.save(model1.state_dict(), save_best)
writer.add_scalar('info/model1_val_dice_score',
avg_metric1[0, 0], iter_num)
writer.add_scalar('info/model1_val_hd95', avg_metric1[0, 1],
iter_num)
logging.info(
'iteration %d : model1_dice_score : %f model1_hd95 : %f' %
(iter_num, avg_metric1[0, 0].mean(),
avg_metric1[0, 1].mean()))
model1.train()
model2.eval()
avg_metric2 = test_all_case(model2,
args.root_path,
test_list="val.txt",
num_classes=2,
patch_size=args.patch_size,
stride_xy=64,
stride_z=64)
if avg_metric2[:, 0].mean() > best_performance2:
best_performance2 = avg_metric2[:, 0].mean()
save_mode_path = os.path.join(
snapshot_path, 'model2_iter_{}_dice_{}.pth'.format(
iter_num, round(best_performance2, 4)))
save_best = os.path.join(
snapshot_path, '{}_best_model2.pth'.format(args.model))
torch.save(model2.state_dict(), save_mode_path)
torch.save(model2.state_dict(), save_best)
writer.add_scalar('info/model2_val_dice_score',
avg_metric2[0, 0], iter_num)
writer.add_scalar('info/model2_val_hd95', avg_metric2[0, 1],
iter_num)
logging.info(
'iteration %d : model2_dice_score : %f model2_hd95 : %f' %
(iter_num, avg_metric2[0, 0].mean(),
avg_metric2[0, 1].mean()))
model2.train()
if iter_num % 3000 == 0:
save_mode_path = os.path.join(
snapshot_path, 'model1_iter_' + str(iter_num) + '.pth')
torch.save(model1.state_dict(), save_mode_path)
logging.info("save model1 to {}".format(save_mode_path))
save_mode_path = os.path.join(
snapshot_path, 'model2_iter_' + str(iter_num) + '.pth')
torch.save(model2.state_dict(), save_mode_path)
logging.info("save model2 to {}".format(save_mode_path))
if iter_num >= max_iterations:
break
time1 = time.time()
if iter_num >= max_iterations:
iterator.close()
break
writer.close()
def train(args, snapshot_path):
base_lr = args.base_lr
num_classes = 4
batch_size = args.batch_size
max_iterations = args.max_iterations
def create_model(ema=False):
# Network definition
net = UNet('efficientnet-b3',
encoder_weights='imagenet',
in_channels=1,
classes=num_classes)
model = net.cuda()
if ema:
for param in model.parameters():
param.detach_()
return model
model = create_model()
ema_model = create_model(ema=True)
def worker_init_fn(worker_id):
random.seed(args.seed + worker_id)
db_train = ACDC(base_dir=args.root_path,
split="train",
num=None,
transform=transforms.Compose(
[RandomGenerator(args.patch_size)]))
db_val = ACDC(base_dir=args.root_path, split="val")
labeled_idxs = list(range(0, args.labeled_num))
unlabeled_idxs = list(range(args.labeled_num, 1312))
batch_sampler = TwoStreamBatchSampler(labeled_idxs, unlabeled_idxs,
batch_size,
batch_size - args.labeled_bs)
trainloader = DataLoader(db_train,
batch_sampler=batch_sampler,
num_workers=4,
pin_memory=True,
worker_init_fn=worker_init_fn)
model.train()
ema_model.train()
valloader = DataLoader(db_val, batch_size=1, shuffle=False, num_workers=1)
optimizer = optim.SGD(model.parameters(),
lr=base_lr,
momentum=0.9,
weight_decay=0.0001)
ce_loss = CrossEntropyLoss()
dice_loss = losses.DiceLoss(num_classes)
writer = SummaryWriter(snapshot_path + '/log')
logging.info("{} iterations per epoch".format(len(trainloader)))
iter_num = 0
max_epoch = max_iterations // len(trainloader) + 1
best_performance = 0.0
iterator = tqdm(range(max_epoch), ncols=70)
for epoch_num in iterator:
for i_batch, sampled_batch in enumerate(trainloader):
volume_batch, label_batch = sampled_batch['image'], sampled_batch[
'label']
volume_batch, label_batch = volume_batch.cuda(), label_batch.cuda()
unlabeled_volume_batch = volume_batch[args.labeled_bs:]
labeled_volume_batch = volume_batch[:args.labeled_bs]
# ICT mix factors
ict_mix_factors = np.random.beta(args.ict_alpha,
args.ict_alpha,
size=(args.labeled_bs // 2, 1, 1,
1))
ict_mix_factors = torch.tensor(ict_mix_factors,
dtype=torch.float).cuda()
unlabeled_volume_batch_0 = unlabeled_volume_batch[
0:args.labeled_bs // 2, ...]
unlabeled_volume_batch_1 = unlabeled_volume_batch[
args.labeled_bs // 2:, ...]
# Mix images
batch_ux_mixed = unlabeled_volume_batch_0 * \
(1.0 - ict_mix_factors) + \
unlabeled_volume_batch_1 * ict_mix_factors
input_volume_batch = torch.cat(
[labeled_volume_batch, batch_ux_mixed], dim=0)
outputs = model(input_volume_batch)
outputs_soft = torch.softmax(outputs, dim=1)
with torch.no_grad():
ema_output_ux0 = torch.softmax(
ema_model(unlabeled_volume_batch_0), dim=1)
ema_output_ux1 = torch.softmax(
ema_model(unlabeled_volume_batch_1), dim=1)
batch_pred_mixed = ema_output_ux0 * \
(1.0 - ict_mix_factors) + ema_output_ux1 * ict_mix_factors
loss_ce = ce_loss(outputs[:args.labeled_bs],
label_batch[:args.labeled_bs][:].long())
loss_dice = dice_loss(outputs_soft[:args.labeled_bs],
label_batch[:args.labeled_bs].unsqueeze(1))
supervised_loss = 0.5 * (loss_dice + loss_ce)
consistency_weight = get_current_consistency_weight(iter_num //
150)
consistency_loss = torch.mean(
(outputs_soft[args.labeled_bs:] - batch_pred_mixed)**2)
loss = supervised_loss + consistency_weight * consistency_loss
optimizer.zero_grad()
loss.backward()
optimizer.step()
update_ema_variables(model, ema_model, args.ema_decay, iter_num)
lr_ = base_lr * (1.0 - iter_num / max_iterations)**0.9
for param_group in optimizer.param_groups:
param_group['lr'] = lr_
iter_num = iter_num + 1
writer.add_scalar('info/lr', lr_, iter_num)
writer.add_scalar('info/total_loss', loss, iter_num)
writer.add_scalar('info/loss_ce', loss_ce, iter_num)
writer.add_scalar('info/loss_dice', loss_dice, iter_num)
writer.add_scalar('info/consistency_loss', consistency_loss,
iter_num)
writer.add_scalar('info/consistency_weight', consistency_weight,
iter_num)
logging.info(
'iteration %d : loss : %f, loss_ce: %f, loss_dice: %f' %
(iter_num, loss.item(), loss_ce.item(), loss_dice.item()))
if iter_num % 20 == 0:
image = volume_batch[1, 0:1, :, :]
writer.add_image('train/Image', image, iter_num)
outputs = torch.argmax(torch.softmax(outputs, dim=1),
dim=1,
keepdim=True)
writer.add_image('train/Prediction', outputs[1, ...] * 50,
iter_num)
image = batch_ux_mixed[1, 0:1, :, :]
writer.add_image('train/Mixed_Unlabeled', image, iter_num)
labs = label_batch[1, ...].unsqueeze(0) * 50
writer.add_image('train/GroundTruth', labs, iter_num)
if iter_num > 0 and iter_num % 200 == 0:
model.eval()
first_total, second_total, third_total = 0.0, 0.0, 0.0
for i_batch, sampled_batch in enumerate(valloader):
first, second, third = test_single_volume(
sampled_batch["image"], sampled_batch["label"], model)
first_total += np.asarray(first)
second_total += np.asarray(second)
third_total += np.asarray(third)
first_total, second_total, third_total = first_total / \
len(db_val), second_total / \
len(db_val), third_total/len(db_val)
writer.add_scalar('info/val_one_dice', first_total[0],
iter_num)
writer.add_scalar('info/val_one_hd95', first_total[1],
iter_num)
writer.add_scalar('info/val_two_dice', second_total[0],
iter_num)
writer.add_scalar('info/val_two_hd95', second_total[1],
iter_num)
writer.add_scalar('info/val_three_dice', third_total[0],
iter_num)
writer.add_scalar('info/val_three_hd95', third_total[1],
iter_num)
performance = (first_total[0] + second_total[0] +
third_total[0]) / 3
mean_hd95 = (first_total[1] + second_total[1] +
third_total[1]) / 3
writer.add_scalar('info/val_mean_dice', performance, iter_num)
writer.add_scalar('info/val_mean_hd95', mean_hd95, iter_num)
if performance > best_performance:
best_performance = performance
save_mode_path = os.path.join(
snapshot_path, 'iter_{}_dice_{}.pth'.format(
iter_num, round(best_performance, 4)))
save_best = os.path.join(
snapshot_path, '{}_best_model.pth'.format(args.model))
torch.save(model.state_dict(), save_mode_path)
torch.save(model.state_dict(), save_best)
logging.info('iteration %d : mean_dice : %f mean_hd95 : %f' %
(iter_num, performance, mean_hd95))
model.train()
if iter_num % 3000 == 0:
save_mode_path = os.path.join(snapshot_path,
'iter_' + str(iter_num) + '.pth')
torch.save(model.state_dict(), save_mode_path)
logging.info("save model to {}".format(save_mode_path))
if iter_num >= max_iterations:
break
if iter_num >= max_iterations:
iterator.close()
break
writer.close()
return "Training Finished!"
def __init__(self,
model,
loss,
n_classes,
learning_rate=0.001,
decay_after=1000000,
weight_decay=0.,
model_file=None,
*args,
**kwargs):
self.model = model
self.model.cuda()
self.init_lr = learning_rate
self.n_classes = n_classes
self.evaluate_with_dropout = kwargs.get("use_mc", False)
self.lr_schedule_type = kwargs.get("lr_schedule_type", 'default')
self.loss_name = loss
print("INFO - Trainer ", model.__class__, loss, n_classes)
self.loss_mask = None
if loss == 'ce':
self.criterion = nn.NLLLoss()
self.criterion_key = 'log_softmax'
elif loss == 'dice':
self.criterion = losses.DiceLoss(n_classes)
self.criterion_key = 'softmax'
elif loss == 'dicev2':
self.criterion = losses.DiceLossv2(n_classes)
self.criterion_key = 'softmax'
elif loss == "dicev3":
self.criterion = losses.soft_dice_loss
self.criterion_key = 'softmax'
elif loss == "brier":
self.criterion = losses.BrierLoss(n_classes)
self.criterion_key = 'softmax'
elif loss == 'brierv2':
self.criterion = losses.brier_score_loss
self.criterion_key = 'softmax'
else:
raise ValueError(
"ERROR - Trainer - loss function unknown {}".format(loss))
self.optimizer = torch.optim.Adam(self.model.parameters(),
lr=learning_rate,
amsgrad=True,
weight_decay=weight_decay)
if self.lr_schedule_type == "default":
print("INFO - using default lr schedule!")
self.scheduler = torch.optim.lr_scheduler.StepLR(
self.optimizer, step_size=decay_after)
else:
self.optimizer = torch.optim.Adam(self.model.parameters(),
lr=learning_rate,
amsgrad=False,
weight_decay=weight_decay)
self.scheduler = CycleLR(self.optimizer,
alpha_zero=self.init_lr,
cycle_length=10000)
self.training_losses = list()
self.validation_losses = list()
self._train_iter = 0
self.current_training_loss = 0.
self.current_validation_loss = 0.
self.current_aleatoric_loss = 0.
if model_file:
self.load(model_file)
if kwargs.get('verbose', False):
torchsummary.summary(self.model,
(kwargs.get('n_channels'), 256, 256))
def train(args, snapshot_path):
base_lr = args.base_lr
num_classes = args.num_classes
batch_size = args.batch_size
max_iterations = args.max_iterations
def create_model(ema=False):
# Network definition
model = net_factory(net_type=args.model,
in_chns=1,
class_num=num_classes)
if ema:
for param in model.parameters():
param.detach_()
return model
model1 = kaiming_normal_init_weight(create_model())
model2 = xavier_normal_init_weight(create_model())
def worker_init_fn(worker_id):
random.seed(args.seed + worker_id)
db_train = BaseDataSets(base_dir=args.root_path,
split="train",
num=None,
transform=transforms.Compose(
[RandomGenerator(args.patch_size)]))
db_val = BaseDataSets(base_dir=args.root_path, split="val")
total_slices = len(db_train)
labeled_slice = patients_to_slices(args.root_path, args.labeled_num)
print("Total silices is: {}, labeled slices is: {}".format(
total_slices, labeled_slice))
labeled_idxs = list(range(0, labeled_slice))
unlabeled_idxs = list(range(labeled_slice, total_slices))
batch_sampler = TwoStreamBatchSampler(labeled_idxs, unlabeled_idxs,
batch_size,
batch_size - args.labeled_bs)
trainloader = DataLoader(db_train,
batch_sampler=batch_sampler,
num_workers=4,
pin_memory=True,
worker_init_fn=worker_init_fn)
model1.train()
model2.train()
valloader = DataLoader(db_val, batch_size=1, shuffle=False, num_workers=1)
optimizer1 = optim.SGD(model1.parameters(),
lr=base_lr,
momentum=0.9,
weight_decay=0.0001)
optimizer2 = optim.SGD(model2.parameters(),
lr=base_lr,
momentum=0.9,
weight_decay=0.0001)
ce_loss = CrossEntropyLoss()
dice_loss = losses.DiceLoss(num_classes)
writer = SummaryWriter(snapshot_path + '/log')
logging.info("{} iterations per epoch".format(len(trainloader)))
iter_num = 0
max_epoch = max_iterations // len(trainloader) + 1
best_performance1 = 0.0
best_performance2 = 0.0
iterator = tqdm(range(max_epoch), ncols=70)
for epoch_num in iterator:
for i_batch, sampled_batch in enumerate(trainloader):
volume_batch, label_batch = sampled_batch['image'], sampled_batch[
'label']
volume_batch, label_batch = volume_batch.cuda(), label_batch.cuda()
outputs1 = model1(volume_batch)
outputs_soft1 = torch.softmax(outputs1, dim=1)
outputs2 = model2(volume_batch)
outputs_soft2 = torch.softmax(outputs2, dim=1)
consistency_weight = get_current_consistency_weight(iter_num //
150)
loss1 = 0.5 * (
ce_loss(outputs1[:args.labeled_bs],
label_batch[:][:args.labeled_bs].long()) +
dice_loss(outputs_soft1[:args.labeled_bs],
label_batch[:args.labeled_bs].unsqueeze(1)))
loss2 = 0.5 * (
ce_loss(outputs2[:args.labeled_bs],
label_batch[:][:args.labeled_bs].long()) +
dice_loss(outputs_soft2[:args.labeled_bs],
label_batch[:args.labeled_bs].unsqueeze(1)))
pseudo_outputs1 = torch.argmax(
outputs_soft1[args.labeled_bs:].detach(), dim=1, keepdim=False)
pseudo_outputs2 = torch.argmax(
outputs_soft2[args.labeled_bs:].detach(), dim=1, keepdim=False)
pseudo_supervision1 = ce_loss(outputs1[args.labeled_bs:],
pseudo_outputs2)
pseudo_supervision2 = ce_loss(outputs2[args.labeled_bs:],
pseudo_outputs1)
model1_loss = loss1 + consistency_weight * pseudo_supervision1
model2_loss = loss2 + consistency_weight * pseudo_supervision2
loss = model1_loss + model2_loss
optimizer1.zero_grad()
optimizer2.zero_grad()
loss.backward()
optimizer1.step()
optimizer2.step()
iter_num = iter_num + 1
lr_ = base_lr * (1.0 - iter_num / max_iterations)**0.9
for param_group in optimizer1.param_groups:
param_group['lr'] = lr_
for param_group in optimizer2.param_groups:
param_group['lr'] = lr_
writer.add_scalar('lr', lr_, iter_num)
writer.add_scalar('consistency_weight/consistency_weight',
consistency_weight, iter_num)
writer.add_scalar('loss/model1_loss', model1_loss, iter_num)
writer.add_scalar('loss/model2_loss', model2_loss, iter_num)
logging.info('iteration %d : model1 loss : %f model2 loss : %f' %
(iter_num, model1_loss.item(), model2_loss.item()))
if iter_num % 50 == 0:
image = volume_batch[1, 0:1, :, :]
writer.add_image('train/Image', image, iter_num)
outputs = torch.argmax(torch.softmax(outputs1, dim=1),
dim=1,
keepdim=True)
writer.add_image('train/model1_Prediction',
outputs[1, ...] * 50, iter_num)
outputs = torch.argmax(torch.softmax(outputs2, dim=1),
dim=1,
keepdim=True)
writer.add_image('train/model2_Prediction',
outputs[1, ...] * 50, iter_num)
labs = label_batch[1, ...].unsqueeze(0) * 50
writer.add_image('train/GroundTruth', labs, iter_num)
if iter_num > 0 and iter_num % 200 == 0:
model1.eval()
metric_list = 0.0
for i_batch, sampled_batch in enumerate(valloader):
metric_i = test_single_volume(sampled_batch["image"],
sampled_batch["label"],
model1,
classes=num_classes)
metric_list += np.array(metric_i)
metric_list = metric_list / len(db_val)
for class_i in range(num_classes - 1):
writer.add_scalar(
'info/model1_val_{}_dice'.format(class_i + 1),
metric_list[class_i, 0], iter_num)
writer.add_scalar(
'info/model1_val_{}_hd95'.format(class_i + 1),
metric_list[class_i, 1], iter_num)
performance1 = np.mean(metric_list, axis=0)[0]
mean_hd951 = np.mean(metric_list, axis=0)[1]
writer.add_scalar('info/model1_val_mean_dice', performance1,
iter_num)
writer.add_scalar('info/model1_val_mean_hd95', mean_hd951,
iter_num)
if performance1 > best_performance1:
best_performance1 = performance1
save_mode_path = os.path.join(
snapshot_path, 'model1_iter_{}_dice_{}.pth'.format(
iter_num, round(best_performance1, 4)))
save_best = os.path.join(
snapshot_path, '{}_best_model1.pth'.format(args.model))
torch.save(model1.state_dict(), save_mode_path)
torch.save(model1.state_dict(), save_best)
logging.info(
'iteration %d : model1_mean_dice : %f model1_mean_hd95 : %f'
% (iter_num, performance1, mean_hd951))
model1.train()
model2.eval()
metric_list = 0.0
for i_batch, sampled_batch in enumerate(valloader):
metric_i = test_single_volume(sampled_batch["image"],
sampled_batch["label"],
model2,
classes=num_classes)
metric_list += np.array(metric_i)
metric_list = metric_list / len(db_val)
for class_i in range(num_classes - 1):
writer.add_scalar(
'info/model2_val_{}_dice'.format(class_i + 1),
metric_list[class_i, 0], iter_num)
writer.add_scalar(
'info/model2_val_{}_hd95'.format(class_i + 1),
metric_list[class_i, 1], iter_num)
performance2 = np.mean(metric_list, axis=0)[0]
mean_hd952 = np.mean(metric_list, axis=0)[1]
writer.add_scalar('info/model2_val_mean_dice', performance2,
iter_num)
writer.add_scalar('info/model2_val_mean_hd95', mean_hd952,
iter_num)
if performance2 > best_performance2:
best_performance2 = performance2
save_mode_path = os.path.join(
snapshot_path, 'model2_iter_{}_dice_{}.pth'.format(
iter_num, round(best_performance2)))
save_best = os.path.join(
snapshot_path, '{}_best_model2.pth'.format(args.model))
torch.save(model2.state_dict(), save_mode_path)
torch.save(model2.state_dict(), save_best)
logging.info(
'iteration %d : model2_mean_dice : %f model2_mean_hd95 : %f'
% (iter_num, performance2, mean_hd952))
model2.train()
# change lr
if iter_num % 2500 == 0:
lr_ = base_lr * 0.1**(iter_num // 2500)
for param_group in optimizer1.param_groups:
param_group['lr'] = lr_
for param_group in optimizer2.param_groups:
param_group['lr'] = lr_
if iter_num % 3000 == 0:
save_mode_path = os.path.join(
snapshot_path, 'model1_iter_' + str(iter_num) + '.pth')
torch.save(model1.state_dict(), save_mode_path)
logging.info("save model1 to {}".format(save_mode_path))
save_mode_path = os.path.join(
snapshot_path, 'model2_iter_' + str(iter_num) + '.pth')
torch.save(model2.state_dict(), save_mode_path)
logging.info("save model2 to {}".format(save_mode_path))
if iter_num >= max_iterations:
break
time1 = time.time()
if iter_num >= max_iterations:
iterator.close()
break
writer.close()
encoder_name="mobilenetv1",
encoder_weights=False,
encoder_depth=5,
psp_out_channels=512, # PSP out channels after concat not yet final
psp_use_batchnorm=True,
psp_dropout=0.2,
in_channels=3,
classes=len(CLASSES),
activation='sigmoid', # Optional[Union[str, callable]]
dilated=False,
# aux_params={'classes': 1, 'height': 320,
# 'width': 320, 'dropout': 0.2}, # Opt
)
# Define parameters
loss = losses.DiceLoss()
metrics = [
metrics.IoU(threshold=0.5),
metrics.Accuracy(),
metrics.Recall()
]
optimizer = torch.optim.Adam([
dict(params=model.parameters(), lr=FLAGS.learning_rate),
])
# optimizer = adam_optimizer(model, FLAGS.learning_rate, weight_decay=1e-4)
lr_step_size = FLAGS.step_size
scheduler = torch.optim.lr_scheduler.StepLR(optimizer,
step_size=lr_step_size,