def CreateTrgDataLoader(args):
if args.source == 'triangle':
# for simple triangle dataset
target_dataset = triangleDatasetTgt(args.data_dir_target,
args.data_list_target,
max_iters=args.num_steps *
args.batch_size,
crop_size=image_sizes['triangle'],
mean=IMG_MEAN)
target_dataloader = data.DataLoader(target_dataset,
batch_size=args.batch_size,
shuffle=True,
num_workers=args.num_workers,
pin_memory=True)
return target_dataloader
if args.data_label_folder_target is not None:
target_dataset = cityscapesDataSetLabel(
args.data_dir_target,
args.data_list_target,
max_iters=args.num_steps * args.batch_size,
crop_size=image_sizes['cityscapes'],
mean=IMG_MEAN,
set=args.set,
label_folder=args.data_label_folder_target)
else:
if args.set == 'train':
target_dataset = cityscapesDataSet(
args.data_dir_target,
args.data_list_target,
max_iters=args.num_steps * args.batch_size,
crop_size=image_sizes['cityscapes'],
mean=IMG_MEAN,
set=args.set)
else:
target_dataset = cityscapesDataSet(
args.data_dir_target,
args.data_list_target,
crop_size=image_sizes['cityscapes'],
mean=IMG_MEAN,
set=args.set)
if args.set == 'train':
target_dataloader = data.DataLoader(target_dataset,
batch_size=args.batch_size,
shuffle=True,
num_workers=args.num_workers,
pin_memory=True)
else:
target_dataloader = data.DataLoader(target_dataset,
batch_size=1,
shuffle=False,
pin_memory=True)
return target_dataloader
def CreateTrgDataLoader(args):
if args.set == 'train' or args.set == 'trainval':
target_dataset = cityscapesDataSetLabel(
args.data_dir_target,
args.data_list_target,
crop_size=image_sizes['cityscapes'],
mean=IMG_MEAN,
max_iters=args.num_steps * args.batch_size,
set=args.set)
else:
target_dataset = cityscapesDataSet(
args.data_dir_target,
args.data_list_target,
crop_size=cs_size_test['cityscapes'],
mean=IMG_MEAN,
set=args.set)
if args.set == 'train' or args.set == 'trainval':
target_dataloader = data.DataLoader(target_dataset,
batch_size=args.batch_size,
shuffle=True,
num_workers=args.num_workers,
pin_memory=True)
else:
target_dataloader = data.DataLoader(target_dataset,
batch_size=1,
shuffle=False,
pin_memory=True)
return target_dataloader
def CreateTrgDataSSLLoader(args):
target_dataset = cityscapesDataSet(args.data_dir_target,
args.data_list_target,
crop_size=image_sizes['cityscapes'],
mean=IMG_MEAN,
set=args.set)
target_dataloader = data.DataLoader(target_dataset,
batch_size=1,
shuffle=False,
pin_memory=True)
return target_dataloader
def CreateTrgDataSSLLoader(args):
"""
Create the Target data loader for SSL training
Args:
commandline arguments
Returns:
torch.utils.data.DataLoader
"""
target_dataset = cityscapesDataSet(args.data_dir_target,
args.data_list_target,
crop_size=image_sizes['cityscapes'],
mean=IMG_MEAN,
set=args.set)
target_dataloader = data.DataLoader(target_dataset,
batch_size=1,
shuffle=False,
pin_memory=True)
return target_dataloader
def main():
'''
Create the model and start the training.
'''
# Device 설정
device = torch.device("cuda" if not args.cpu else "cpu")
# Source와 Target 모두 1280 * 720으로 resizing
w, h = map(int, args.input_size.split(','))
input_size = (w, h)
w, h = map(int, args.input_size_target.split(','))
input_size_target = (w, h)
cudnn.enabled = True
# 모델 생성
if args.model == 'DeepLab':
model = DeeplabMulti(num_classes=args.num_classes)
if args.restore_from[:4] == 'http' : # 미리 학습된 weight를 다운로드
saved_state_dict = model_zoo.load_url(args.restore_from)
else: # pth 파일을 직접 설정할 경우
saved_state_dict = torch.load(args.restore_from)
new_params = model.state_dict().copy()
for i in saved_state_dict:
# Scale.layer5.conv2d_list.3.weight
i_parts = i.split('.')
# print i_parts
if not args.num_classes == 19 or not i_parts[1] == 'layer5':
new_params['.'.join(i_parts[1:])] = saved_state_dict[i]
# print i_parts
model.load_state_dict(new_params)
model.train()
model.to(device)
cudnn.benchmark = True
# Discriminator 생성
model_D1 = FCDiscriminator(num_classes=args.num_classes).to(device)
model_D2 = FCDiscriminator(num_classes=args.num_classes).to(device)
model_D1.train()
model_D1.to(device)
model_D2.train()
model_D2.to(device)
if not os.path.exists(args.snapshot_dir):
os.makedirs(args.snapshot_dir)
trainloader = data.DataLoader(
GTA5DataSet(args.data_dir, args.data_list, max_iters=args.num_steps * args.iter_size * args.batch_size,
crop_size=input_size,
scale=args.random_scale, mirror=args.random_mirror, mean=IMG_MEAN),
batch_size=args.batch_size, shuffle=True, num_workers=args.num_workers, pin_memory=True)
trainloader_iter = enumerate(trainloader)
targetloader = data.DataLoader(cityscapesDataSet(args.data_dir_target, args.data_list_target,
max_iters=args.num_steps * args.iter_size * args.batch_size,
crop_size=input_size_target,
scale=False, mirror=args.random_mirror, mean=IMG_MEAN,
set=args.set),
batch_size=args.batch_size, shuffle=True, num_workers=args.num_workers,
pin_memory=True)
targetloader_iter = enumerate(targetloader)
# implement model.optim_parameters(args) to handle different models' lr setting
optimizer = optim.SGD(model.optim_parameters(args),
lr=args.learning_rate, momentum=args.momentum, weight_decay=args.weight_decay)
optimizer.zero_grad()
optimizer_D1 = optim.Adam(model_D1.parameters(), lr=args.learning_rate_D, betas=(0.9, 0.99))
optimizer_D1.zero_grad()
optimizer_D2 = optim.Adam(model_D2.parameters(), lr=args.learning_rate_D, betas=(0.9, 0.99))
optimizer_D2.zero_grad()
if args.gan == 'Vanilla':
bce_loss = torch.nn.BCEWithLogitsLoss()
elif args.gan == 'LS':
bce_loss = torch.nn.MSELoss()
seg_loss = torch.nn.CrossEntropyLoss(ignore_index=255)
interp = nn.Upsample(size=(input_size[1], input_size[0]), mode='bilinear', align_corners=True)
interp_target = nn.Upsample(size=(input_size_target[1], input_size_target[0]), mode='bilinear', align_corners=True)
# labels for adversarial training
source_label = 0
target_label = 1
# set up tensor board
if args.tensorboard:
if not os.path.exists(args.log_dir):
os.makedirs(args.log_dir)
writer = SummaryWriter(args.log_dir)
for i_iter in range(args.num_steps):
loss_seg_value1 = 0
loss_adv_target_value1 = 0
loss_D_value1 = 0
loss_seg_value2 = 0
loss_adv_target_value2 = 0
loss_D_value2 = 0
optimizer.zero_grad()
adjust_learning_rate(optimizer, i_iter)
optimizer_D1.zero_grad()
optimizer_D2.zero_grad()
adjust_learning_rate_D(optimizer_D1, i_iter)
adjust_learning_rate_D(optimizer_D2, i_iter)
for sub_i in range(args.iter_size):
# train G
# don't accumulate grads in D
for param in model_D1.parameters():
param.requires_grad = False
for param in model_D2.parameters():
param.requires_grad = False
# train with source
_, batch = trainloader_iter.__next__()
images, labels, _, _, domainess = batch
adw = torch.sqrt(1-domainess).float()
adw.requires_grad = False
images = images.to(device)
labels = labels.long().to(device)
pred1, pred2 = model(images)
pred1 = interp(pred1)
pred2 = interp(pred2)
loss_seg1 = seg_loss(pred1, labels)
loss_seg2 = seg_loss(pred2, labels)
loss = loss_seg2 + args.lambda_seg * loss_seg1
# proper normalization
loss = loss / args.iter_size
loss.backward()
loss_seg_value1 += loss_seg1.item() / args.iter_size
loss_seg_value2 += loss_seg2.item() / args.iter_size
# train with target
_, batch = targetloader_iter.__next__()
images, _, _ = batch
images = images.to(device)
pred_target1, pred_target2 = model(images)
pred_target1 = interp_target(pred_target1)
pred_target2 = interp_target(pred_target2)
D_out1 = model_D1(F.softmax(pred_target1))
D_out2 = model_D2(F.softmax(pred_target2))
loss_adv_target1 = adw*bce_loss(D_out1, torch.FloatTensor(D_out1.data.size()).fill_(source_label).to(device))
loss_adv_target2 = adw*bce_loss(D_out2, torch.FloatTensor(D_out2.data.size()).fill_(source_label).to(device))
loss = args.lambda_adv_target1 * loss_adv_target1 + args.lambda_adv_target2 * loss_adv_target2
loss = loss / args.iter_size
loss.backward()
loss_adv_target_value1 += loss_adv_target1.item() / args.iter_size
loss_adv_target_value2 += loss_adv_target2.item() / args.iter_size
# train D
# bring back requires_grad
for param in model_D1.parameters():
param.requires_grad = True
for param in model_D2.parameters():
param.requires_grad = True
# train with source
pred1 = pred1.detach()
pred2 = pred2.detach()
D_out1 = model_D1(F.softmax(pred1))
D_out2 = model_D2(F.softmax(pred2))
loss_D1 = bce_loss(D_out1, torch.FloatTensor(D_out1.data.size()).fill_(source_label).to(device))
loss_D2 = bce_loss(D_out2, torch.FloatTensor(D_out2.data.size()).fill_(source_label).to(device))
loss_D1 = loss_D1 / args.iter_size / 2
loss_D2 = loss_D2 / args.iter_size / 2
loss_D1.backward()
loss_D2.backward()
loss_D_value1 += loss_D1.item()
loss_D_value2 += loss_D2.item()
# train with target
pred_target1 = pred_target1.detach()
pred_target2 = pred_target2.detach()
D_out1 = model_D1(F.softmax(pred_target1))
D_out2 = model_D2(F.softmax(pred_target2))
loss_D1 = bce_loss(D_out1, torch.FloatTensor(D_out1.data.size()).fill_(target_label).to(device))
loss_D2 = bce_loss(D_out2, torch.FloatTensor(D_out2.data.size()).fill_(target_label).to(device))
loss_D1 = loss_D1 / args.iter_size / 2
loss_D2 = loss_D2 / args.iter_size / 2
loss_D1.backward()
loss_D2.backward()
loss_D_value1 += loss_D1.item()
loss_D_value2 += loss_D2.item()
optimizer.step()
optimizer_D1.step()
optimizer_D2.step()
if args.tensorboard:
scalar_info = {
'loss_seg1': loss_seg_value1,
'loss_seg2': loss_seg_value2,
'loss_adv_target1': loss_adv_target_value1,
'loss_adv_target2': loss_adv_target_value2,
'loss_D1': loss_D_value1,
'loss_D2': loss_D_value2,
}
if i_iter % 10 == 0:
for key, val in scalar_info.items():
writer.add_scalar(key, val, i_iter)
print('exp = {}'.format(args.snapshot_dir))
print(
'iter = {0:8d}/{1:8d}, loss_seg1 = {2:.3f} loss_seg2 = {3:.3f} loss_adv1 = {4:.3f}, loss_adv2 = {5:.3f} loss_D1 = {6:.3f} loss_D2 = {7:.3f}'.format(
i_iter, args.num_steps, loss_seg_value1, loss_seg_value2, loss_adv_target_value1, loss_adv_target_value2, loss_D_value1, loss_D_value2))
if i_iter >= args.num_steps_stop - 1:
print('save model ...')
torch.save(model.state_dict(), osp.join(args.snapshot_dir, 'GTA5_' + str(args.num_steps_stop) + '.pth'))
torch.save(model_D1.state_dict(), osp.join(args.snapshot_dir, 'GTA5_' + str(args.num_steps_stop) + '_D1.pth'))
torch.save(model_D2.state_dict(), osp.join(args.snapshot_dir, 'GTA5_' + str(args.num_steps_stop) + '_D2.pth'))
break
if i_iter % args.save_pred_every == 0 and i_iter != 0:
print('taking snapshot ...')
torch.save(model.state_dict(), osp.join(args.snapshot_dir, 'GTA5_' + str(i_iter) + '.pth'))
torch.save(model_D1.state_dict(), osp.join(args.snapshot_dir, 'GTA5_' + str(i_iter) + '_D1.pth'))
torch.save(model_D2.state_dict(), osp.join(args.snapshot_dir, 'GTA5_' + str(i_iter) + '_D2.pth'))
if args.tensorboard:
writer.close()