def train_module(_opt):
#def train_module(_train_path, _train_save, _resume_snapshot,_batchsize):
#parser = argparse.ArgumentParser()
#parser.add_argument('--epoch', type=int, default=10, help='epoch number')
#parser.add_argument('--lr', type=float, default=3e-4, help='learning rate')
#parser.add_argument('--batchsize', type=int, default=_batchsize, help='training batch size')
#parser.add_argument('--trainsize', type=int, default=352, help='training dataset size')
#parser.add_argument('--clip', type=float, default=0.5, help='gradient clipping margin')
#parser.add_argument('--decay_rate', type=float, default=0.1, help='decay rate of learning rate')
#parser.add_argument('--decay_epoch', type=int, default=50, help='every n epochs decay learning rate')
#parser.add_argument('--train_path', type=str, default=_train_path)
#parser.add_argument('--train_save', type=str, default=_train_save)
#parser.add_argument('--resume_snapshot', type=str, default=_resume_snapshot)
#opt = parser.parse_args()
opt = _opt
# ---- build models ----
torch.cuda.set_device(0)
model = Network(channel=32, n_class=1).cuda()
model.load_state_dict(torch.load(opt.resume_snapshot))
params = model.parameters()
optimizer = torch.optim.Adam(params, opt.lr)
image_root = '{}/Imgs/'.format(opt.train_path)
gt_root = '{}/GT/'.format(opt.train_path)
edge_root = '{}/Edge/'.format(opt.train_path)
train_loader = get_loader(image_root,
gt_root,
edge_root,
batchsize=opt.batchsize,
trainsize=opt.trainsize)
total_step = len(train_loader)
print("#" * 20, "Start Training", "#" * 20)
for epoch in range(1, opt.epoch):
adjust_lr(optimizer, opt.lr, epoch, opt.decay_rate, opt.decay_epoch)
trainer(train_loader=train_loader,
model=model,
optimizer=optimizer,
epoch=epoch,
opt=opt,
total_step=total_step)
BCE = torch.nn.BCEWithLogitsLoss()
params = model.parameters()
optimizer = torch.optim.Adam(params, opt.lr)
image_root = '{}/Imgs/'.format(opt.train_path)
gt_root = '{}/GT/'.format(opt.train_path)
edge_root = '{}/Edge/'.format(opt.train_path)
train_loader = get_loader(image_root,
gt_root,
edge_root,
batchsize=opt.batchsize,
trainsize=opt.trainsize,
num_workers=opt.num_workers)
total_step = len(train_loader)
# ---- start !! -----
print(
"#" * 20,
"\nStart Training (Inf-Net-{})\n{}\nThis code is written for 'Inf-Net: Automatic COVID-19 Lung "
"Infection Segmentation from CT Scans', 2020, TMI.\n"
"----\nPlease cite the paper if you use this code and dataset. "
"And any questions feel free to contact me "
"via E-mail ([email protected])\n----\n".format(opt.backbone,
opt), "#" * 20)
for epoch in range(1, opt.epoch):
adjust_lr(optimizer, opt.lr, epoch, opt.decay_rate, opt.decay_epoch)
train(train_loader, model, optimizer, epoch, train_save)
def cross_validation(train_save, opt):
image_root = '{}/Imgs/'.format(opt.all_path)
gt_root = '{}/GT/'.format(opt.all_path)
edge_root = '{}/Edge/'.format(opt.all_path)
images = np.array(
sorted([
image_root + f for f in os.listdir(image_root)
if f.endswith('.jpg') or f.endswith('.png')
]))
gts = np.array(
sorted(
[gt_root + f for f in os.listdir(gt_root) if f.endswith('.png')]))
edges = np.array(
sorted([
edge_root + f for f in os.listdir(edge_root) if f.endswith('.png')
]))
k_folds = KFold(opt.folds)
VALIDATION_EARLY_STOPPING = 6
for fold_index, (train_index,
test_index) in enumerate(k_folds.split(images)):
best_loss = 99999
current_validation_early_count = 0
random.seed(opt.seed)
np.random.seed(opt.seed)
torch.manual_seed(opt.seed)
torch.cuda.manual_seed(opt.seed)
torch.random.manual_seed(opt.seed)
model, optimizer = create_model(opt)
train_dataset = IndicesDataset(images[train_index], gts[train_index],
edges[train_index], opt.trainsize,
opt.is_data_augment, opt.random_cutout)
test_dataset = IndicesDataset(images[test_index],
gts[test_index],
None,
opt.trainsize,
opt.is_data_augment,
opt.random_cutout,
is_test=True)
train_loader = torch.utils.data.DataLoader(dataset=train_dataset,
batch_size=opt.batchsize,
shuffle=True,
num_workers=opt.num_workers,
pin_memory=True,
drop_last=False)
test_loader = torch.utils.data.DataLoader(dataset=test_dataset,
batch_size=opt.batchsize,
shuffle=True,
num_workers=opt.num_workers,
pin_memory=True,
drop_last=False)
for epoch in range(1, opt.epoch):
adjust_lr(optimizer, opt.lr, epoch, opt.decay_rate,
opt.decay_epoch)
average_test_loss = train(train_loader, test_loader, model,
optimizer, epoch, train_save, opt.device,
opt)
if average_test_loss < best_loss:
best_loss = average_test_loss
current_validation_early_count = 0
else:
current_validation_early_count += 1
if current_validation_early_count >= VALIDATION_EARLY_STOPPING:
break
metric_string = eval(test_loader, model, opt.device, None,
opt.eval_threshold, opt)
# write the metrics
os.makedirs(os.path.join(opt.metric_path, opt.train_save),
exist_ok=True)
filename = os.path.join(opt.metric_path, opt.train_save,
f"metrics_{fold_index}.txt")
with open(f'{filename}', 'a') as f:
f.write(metric_string)