def test(args):
print("Predicting ...")
test_paths = os.listdir(os.path.join(args.dataset_dir, args.test_img_dir))
print(len(test_paths), 'test images found')
test_df = pd.DataFrame({'ImageId': test_paths, 'EncodedPixels': None})
from skimage.morphology import binary_opening, disk
test_df = test_df[:5000]
test_loader = make_dataloader(test_df,
args,
batch_size=args.batch_size,
shuffle=False,
transform=None,
mode='predict')
model = UNet()
if args.gpu and torch.cuda.is_available():
model = model.cuda()
run_id = 1
print("Resuming run #{}...".format(run_id))
model_path = Path('model_{run_id}.pt'.format(run_id=run_id))
state = torch.load(str(model_path))
state = {
key.replace('module.', ''): value
for key, value in state['model'].items()
}
model.load_state_dict(state)
out_pred_rows = []
for batch_id, (inputs,
image_paths) in enumerate(tqdm(test_loader,
desc='Predict')):
if args.gpu and torch.cuda.is_available():
inputs = inputs.cuda()
inputs = torch.tensor(inputs)
outputs = model(inputs)
for i, image_name in enumerate(image_paths):
mask = torch.sigmoid(outputs[i, 0]).data.cpu().numpy()
cur_seg = binary_opening(mask > 0.5, disk(2))
cur_rles = multi_rle_encode(cur_seg)
if len(cur_rles) > 0:
for c_rle in cur_rles:
out_pred_rows += [{
'ImageId': image_name,
'EncodedPixels': c_rle
}]
else:
out_pred_rows += [{
'ImageId': image_name,
'EncodedPixels': None
}]
submission_df = pd.DataFrame(out_pred_rows)[['ImageId', 'EncodedPixels']]
submission_df.to_csv('submission.csv', index=False)
print("done.")
def main(args):
train_image_dir = args.train_image_dir
train_label_dir = args.train_label_dir
val_image_dir = args.val_image_dir
val_label_dir = args.val_label_dir
batch_size = 4
num_workers = 4
optimizer = optim.SGD
criterion = MixLoss(nn.BCEWithLogitsLoss(), 0.5, DiceLoss(), 1)
thresh = 0.1
recall_partial = partial(recall, thresh=thresh)
precision_partial = partial(precision, thresh=thresh)
fbeta_score_partial = partial(fbeta_score, thresh=thresh)
model = UNet(1, 1, first_out_channels=16)
model = nn.DataParallel(model.cuda())
transforms = [
tsfm.Window(-200, 1000),
tsfm.MinMaxNorm(-200, 1000)
]
ds_train = FracNetTrainDataset(train_image_dir, train_label_dir,
transforms=transforms)
dl_train = FracNetTrainDataset.get_dataloader(ds_train, batch_size, False,
num_workers)
ds_val = FracNetTrainDataset(val_image_dir, val_label_dir,
transforms=transforms)
dl_val = FracNetTrainDataset.get_dataloader(ds_val, batch_size, False,
num_workers)
databunch = DataBunch(dl_train, dl_val,
collate_fn=FracNetTrainDataset.collate_fn)
learn = Learner(
databunch,
model,
opt_func=optimizer,
loss_func=criterion,
metrics=[dice, recall_partial, precision_partial, fbeta_score_partial]
)
learn.fit_one_cycle(
200,
1e-1,
pct_start=0,
div_factor=1000,
callbacks=[
ShowGraph(learn),
]
)
if args.save_model:
save(model.module.state_dict(), "./model_weights.pth")
def main():
global args, best_prec1
args = parser.parse_args()
print(args)
if args.saveTest == 'True':
args.saveTest = True
elif args.saveTest == 'False':
args.saveTest = False
# Check if the save directory exists or not
if not os.path.exists(args.save_dir):
os.makedirs(args.save_dir)
cudnn.benchmark = True
data_transforms = {
'train': transforms.Compose([
transforms.Resize((args.imageSize, args.imageSize), interpolation=Image.NEAREST),
transforms.TenCrop(args.resizedImageSize),
transforms.Lambda(lambda crops: torch.stack([transforms.ToTensor()(crop) for crop in crops])),
#transforms.Lambda(lambda normalized: torch.stack([transforms.Normalize([0.295, 0.204, 0.197], [0.221, 0.188, 0.182])(crop) for crop in normalized]))
#transforms.RandomResizedCrop(224, interpolation=Image.NEAREST),
#transforms.RandomHorizontalFlip(),
#transforms.RandomVerticalFlip(),
#transforms.ToTensor(),
]),
'test': transforms.Compose([
transforms.Resize((args.imageSize, args.imageSize), interpolation=Image.NEAREST),
transforms.ToTensor(),
#transforms.Normalize([0.295, 0.204, 0.197], [0.221, 0.188, 0.182])
]),
}
# Data Loading
data_dir = 'datasets/miccaiSegRefined'
# json path for class definitions
json_path = 'datasets/miccaiSegClasses.json'
image_datasets = {x: miccaiSegDataset(os.path.join(data_dir, x), data_transforms[x],
json_path) for x in ['train', 'test']}
dataloaders = {x: torch.utils.data.DataLoader(image_datasets[x],
batch_size=args.batchSize,
shuffle=True,
num_workers=args.workers)
for x in ['train', 'test']}
dataset_sizes = {x: len(image_datasets[x]) for x in ['train', 'test']}
# Get the dictionary for the id and RGB value pairs for the dataset
classes = image_datasets['train'].classes
key = utils.disentangleKey(classes)
num_classes = len(key)
# Initialize the model
model = UNet(num_classes)
# # Optionally resume from a checkpoint
# if args.resume:
# if os.path.isfile(args.resume):
# print("=> loading checkpoint '{}'".format(args.resume))
# checkpoint = torch.load(args.resume)
# #args.start_epoch = checkpoint['epoch']
# pretrained_dict = checkpoint['state_dict']
# pretrained_dict = {k: v for k, v in pretrained_dict.items() if k in model.state_dict()}
# model.state_dict().update(pretrained_dict)
# model.load_state_dict(model.state_dict())
# print("=> loaded checkpoint (epoch {})".format(checkpoint['epoch']))
# else:
# print("=> no checkpoint found at '{}'".format(args.resume))
#
# # # Freeze the encoder weights
# # for param in model.encoder.parameters():
# # param.requires_grad = False
#
# optimizer = optim.Adam(model.parameters(), lr = args.lr, weight_decay = args.wd)
# else:
optimizer = optim.Adam(model.parameters(), lr = args.lr, weight_decay = args.wd)
# Load the saved model
if os.path.isfile(args.resume):
print("=> loading checkpoint '{}'".format(args.resume))
checkpoint = torch.load(args.resume)
args.start_epoch = checkpoint['epoch']
model.load_state_dict(checkpoint['state_dict'])
print("=> loaded checkpoint (epoch {})".format(checkpoint['epoch']))
else:
print("=> no checkpoint found at '{}'".format(args.resume))
print(model)
# Define loss function (criterion)
criterion = nn.CrossEntropyLoss()
# Use a learning rate scheduler
scheduler = optim.lr_scheduler.StepLR(optimizer, step_size=10, gamma=0.5)
if use_gpu:
model.cuda()
criterion.cuda()
# Initialize an evaluation Object
evaluator = utils.Evaluate(key, use_gpu)
for epoch in range(args.start_epoch, args.epochs):
#adjust_learning_rate(optimizer, epoch)
# Train for one epoch
print('>>>>>>>>>>>>>>>>>>>>>>>Training<<<<<<<<<<<<<<<<<<<<<<<')
train(dataloaders['train'], model, criterion, optimizer, scheduler, epoch, key)
# Evaulate on validation set
print('>>>>>>>>>>>>>>>>>>>>>>>Testing<<<<<<<<<<<<<<<<<<<<<<<')
validate(dataloaders['test'], model, criterion, epoch, key, evaluator)
# Calculate the metrics
print('>>>>>>>>>>>>>>>>>> Evaluating the Metrics <<<<<<<<<<<<<<<<<')
IoU = evaluator.getIoU()
print('Mean IoU: {}, Class-wise IoU: {}'.format(torch.mean(IoU), IoU))
PRF1 = evaluator.getPRF1()
precision, recall, F1 = PRF1[0], PRF1[1], PRF1[2]
print('Mean Precision: {}, Class-wise Precision: {}'.format(torch.mean(precision), precision))
print('Mean Recall: {}, Class-wise Recall: {}'.format(torch.mean(recall), recall))
print('Mean F1: {}, Class-wise F1: {}'.format(torch.mean(F1), F1))
evaluator.reset()
save_checkpoint({
'epoch': epoch + 1,
'state_dict': model.state_dict(),
'optimizer': optimizer.state_dict(),
}, filename=os.path.join(args.save_dir, 'checkpoint_{}.tar'.format(epoch)))
def train(args):
print("Traning")
print("Prepaing data")
masks = pd.read_csv(os.path.join(args.dataset_dir, args.train_masks))
unique_img_ids = get_unique_img_ids(masks, args)
train_df, valid_df = get_balanced_train_valid(masks, unique_img_ids, args)
if args.stage == 0:
train_shape = (256, 256)
batch_size = args.stage0_batch_size
extra_epoch = args.stage0_epochs
elif args.stage == 1:
train_shape = (384, 384)
batch_size = args.stage1_batch_size
extra_epoch = args.stage1_epochs
elif args.stage == 2:
train_shape = (512, 512)
batch_size = args.stage2_batch_size
extra_epoch = args.stage2_epochs
elif args.stage == 3:
train_shape = (768, 768)
batch_size = args.stage3_batch_size
extra_epoch = args.stage3_epochs
print("Stage {}".format(args.stage))
train_transform = DualCompose([
Resize(train_shape),
HorizontalFlip(),
VerticalFlip(),
RandomRotate90(),
Shift(),
Transpose(),
# ImageOnly(RandomBrightness()),
# ImageOnly(RandomContrast()),
])
val_transform = DualCompose([
Resize(train_shape),
])
train_dataloader = make_dataloader(train_df,
args,
batch_size,
args.shuffle,
transform=train_transform)
val_dataloader = make_dataloader(valid_df,
args,
batch_size // 2,
args.shuffle,
transform=val_transform)
# Build model
model = UNet()
optimizer = Adam(model.parameters(), lr=args.lr)
scheduler = StepLR(optimizer, step_size=args.decay_fr, gamma=0.1)
if args.gpu and torch.cuda.is_available():
model = model.cuda()
# Restore model ...
run_id = 4
model_path = Path('model_{run_id}.pt'.format(run_id=run_id))
if not model_path.exists() and args.stage > 0:
raise ValueError(
'model_{run_id}.pt does not exist, initial train first.'.format(
run_id=run_id))
if model_path.exists():
state = torch.load(str(model_path))
last_epoch = state['epoch']
step = state['step']
model.load_state_dict(state['model'])
print('Restore model, epoch {}, step {:,}'.format(last_epoch, step))
else:
last_epoch = 1
step = 0
log_file = open('train_{run_id}.log'.format(run_id=run_id),
'at',
encoding='utf8')
loss_fn = LossBinary(jaccard_weight=args.iou_weight)
valid_losses = []
print("Start training ...")
for _ in range(last_epoch):
scheduler.step()
for epoch in range(last_epoch, last_epoch + extra_epoch):
scheduler.step()
model.train()
random.seed()
tq = tqdm(total=len(train_dataloader) * batch_size)
tq.set_description('Run Id {}, Epoch {} of {}, lr {}'.format(
run_id, epoch, last_epoch + extra_epoch,
args.lr * (0.1**(epoch // args.decay_fr))))
losses = []
try:
mean_loss = 0.
for i, (inputs, targets) in enumerate(train_dataloader):
inputs, targets = torch.tensor(inputs), torch.tensor(targets)
if args.gpu and torch.cuda.is_available():
inputs = inputs.cuda()
targets = targets.cuda()
outputs = model(inputs)
loss = loss_fn(outputs, targets)
loss.backward()
optimizer.step()
step += 1
tq.update(batch_size)
losses.append(loss.item())
mean_loss = np.mean(losses[-args.log_fr:])
tq.set_postfix(loss="{:.5f}".format(mean_loss))
if i and (i % args.log_fr) == 0:
write_event(log_file, step, loss=mean_loss)
write_event(log_file, step, loss=mean_loss)
tq.close()
save_model(model, epoch, step, model_path)
valid_metrics = validation(args, model, loss_fn, val_dataloader)
write_event(log_file, step, **valid_metrics)
valid_loss = valid_metrics['valid_loss']
valid_losses.append(valid_loss)
except KeyboardInterrupt:
tq.close()
print('Ctrl+C, saving snapshot')
save_model(model, epoch, step, model_path)
print('Terminated.')
print('Done.')
class BaseModel:
losses = {'train': [], 'val': []}
acces = {'train': [], 'val': []}
scores = {'train': [], 'val': []}
pred = {'train': [], 'val': []}
true = {'train': [], 'val': []}
def __init__(self, args):
self.args = args
self.net = None
print(args.model_name)
if args.model_name == 'UNet':
self.net = UNet(args.in_channels, args.num_classes)
self.net.apply(weights_init)
elif args.model_name == 'UNetResNet34':
self.net = UNetResNet34(args.num_classes, dropout_2d=0.2)
elif args.model_name == 'UNetResNet152':
self.net = UNetResNet152(args.num_classes, dropout_2d=0.2)
elif args.model_name == 'UNet11':
self.net = UNet11(args.num_classes, pretrained=True)
elif args.model_name == 'UNetVGG16':
self.net = UNetVGG16(args.num_classes,
pretrained=True,
dropout_2d=0.0,
is_deconv=True)
elif args.model_name == 'deeplab50_v2':
if args.ms:
raise NotImplemented
else:
self.net = deeplab50_v2(args.num_classes,
pretrained=args.pretrained)
elif args.model_name == 'deeplab_v2':
if args.ms:
self.net = ms_deeplab_v2(args.num_classes,
pretrained=args.pretrained,
scales=args.ms_scales)
else:
self.net = deeplab_v2(args.num_classes,
pretrained=args.pretrained)
elif args.model_name == 'deeplab_v3':
if args.ms:
self.net = ms_deeplab_v3(args.num_classes,
out_stride=args.out_stride,
pretrained=args.pretrained,
scales=args.ms_scales)
else:
self.net = deeplab_v3(args.num_classes,
out_stride=args.out_stride,
pretrained=args.pretrained)
elif args.model_name == 'deeplab_v3_plus':
if args.ms:
self.net = ms_deeplab_v3_plus(args.num_classes,
out_stride=args.out_stride,
pretrained=args.pretrained,
scales=args.ms_scales)
else:
self.net = deeplab_v3_plus(args.num_classes,
out_stride=args.out_stride,
pretrained=args.pretrained)
self.interp = nn.Upsample(size=args.size, mode='bilinear')
self.iterations = args.epochs
self.lr_current = args.lr
self.cuda = args.cuda
self.phase = args.phase
self.lr_policy = args.lr_policy
self.cyclic_m = args.cyclic_m
if self.lr_policy == 'cyclic':
print('using cyclic')
assert self.iterations % self.cyclic_m == 0
if args.loss == 'CELoss':
self.criterion = nn.CrossEntropyLoss(size_average=True)
elif args.loss == 'DiceLoss':
self.criterion = DiceLoss(num_classes=args.num_classes)
elif args.loss == 'MixLoss':
self.criterion = MixLoss(args.num_classes,
weights=args.loss_weights)
elif args.loss == 'LovaszLoss':
self.criterion = LovaszSoftmax(per_image=args.loss_per_img)
elif args.loss == 'FocalLoss':
self.criterion = FocalLoss(args.num_classes, alpha=None, gamma=2)
else:
raise RuntimeError('must define loss')
if 'deeplab' in args.model_name:
self.optimizer = optim.SGD(
[{
'params': get_1x_lr_params_NOscale(self.net),
'lr': args.lr
}, {
'params': get_10x_lr_params(self.net),
'lr': 10 * args.lr
}],
lr=args.lr,
momentum=args.momentum,
weight_decay=args.weight_decay)
else:
self.optimizer = optim.SGD(filter(lambda p: p.requires_grad,
self.net.parameters()),
lr=args.lr,
momentum=args.momentum,
weight_decay=args.weight_decay)
self.iters = 0
self.best_val = 0.0
self.count = 0
def init_model(self):
if self.args.resume_model:
saved_state_dict = torch.load(
self.args.resume_model,
map_location=lambda storage, loc: storage)
if self.args.ms:
new_params = self.net.Scale.state_dict().copy()
for i in saved_state_dict:
# Scale.layer5.conv2d_list.3.weight
i_parts = i.split('.')
# print i_parts
if not (not i_parts[0] == 'layer5') and (not i_parts[0]
== 'decoder'):
new_params[i] = saved_state_dict[i]
self.net.Scale.load_state_dict(new_params)
else:
new_params = self.net.state_dict().copy()
for i in saved_state_dict:
# Scale.layer5.conv2d_list.3.weight
i_parts = i.split('.')
# print i_parts
if (not i_parts[0] == 'layer5') and (not i_parts[0]
== 'decoder'):
# if not i_parts[0] == 'layer5':
new_params[i] = saved_state_dict[i]
self.net.load_state_dict(new_params)
print('Resuming training, image net loading {}...'.format(
self.args.resume_model))
# self.load_weights(self.net, self.args.resume_model)
if self.args.mGPUs:
self.net = nn.DataParallel(self.net)
if self.args.cuda:
self.net = self.net.cuda()
cudnn.benchmark = True
def _adjust_learning_rate(self, epoch):
"""Sets the learning rate to the initial LR decayed by 10 at every specified step
# Adapted from PyTorch Imagenet example:
# https://github.com/pytorch/examples/blob/master/imagenet/main.py
"""
if epoch < int(self.iterations * 0.5):
self.lr_current = max(self.lr_current * self.args.gamma, 1e-4)
elif epoch < int(self.iterations * 0.85):
self.lr_current = max(self.lr_current * self.args.gamma, 1e-5)
else:
self.lr_current = max(self.lr_current * self.args.gamma, 1e-6)
self.optimizer.param_groups[0]['lr'] = self.lr_current
self.optimizer.param_groups[1]['lr'] = self.lr_current * 10
def save_network(self, net, net_name, epoch, label=''):
save_fname = '%s_%s_%s.pth' % (epoch, net_name, label)
save_path = os.path.join(self.args.save_folder, self.args.exp_name,
save_fname)
torch.save(net.state_dict(), save_path)
def load_weights(self, net, base_file):
other, ext = os.path.splitext(base_file)
if ext == '.pkl' or '.pth':
print('Loading weights into state dict...')
net.load_state_dict(
torch.load(base_file,
map_location=lambda storage, loc: storage))
print('Finished!')
else:
print('Sorry only .pth and .pkl files supported.')
def load_trained_model(self):
path = os.path.join(self.args.save_folder, self.args.exp_name,
self.args.trained_model)
print('eval cls, image net loading {}...'.format(path))
if self.args.ms:
self.load_weights(self.net.Scale, path)
else:
self.load_weights(self.net, path)
def eval(self, dataloader):
assert self.phase == 'test', "Command arg phase should be 'test'. "
from tqdm import tqdm
self.net.eval()
output = []
for i, image in tqdm(enumerate(dataloader)):
if self.cuda:
image = Variable(image.cuda(), volatile=True)
else:
image = Variable(image, volatile=True)
# cls forward
out = self.net(image)
if isinstance(out, list):
out_max = out[-1]
if out_max.size(2) != image.size(2):
out = self.interp(out_max)
else:
if out.size(2) != image.size(2):
out = self.interp(out)
# out [bs * num_tta, c, h, w]
if self.args.use_tta:
num_tta = len(tta_config)
# out = F.softmax(out, dim=1)
out = detta_score(
out.view(num_tta, -1, self.args.num_classes, out.size(2),
out.size(3))) # [num_tta, bs, nclass, H, W]
out = out.mean(dim=0) # [bs, nclass, H, W]
out = F.softmax(out)
output.extend([
resize(pred[1].data.cpu().numpy(), (101, 101)) for pred in out
])
return np.array(output)
def tta(self, dataloaders):
results = np.zeros(shape=(len(dataloaders[0].dataset),
self.args.num_classes))
for dataloader in dataloaders:
output = self.eval(dataloader)
results += output
return np.argmax(results, 1)
def tta_output(self, dataloaders):
results = np.zeros(shape=(len(dataloaders[0].dataset),
self.args.num_classes))
for dataloader in dataloaders:
output = self.eval(dataloader)
results += output
return results
def test_val(self, dataloader):
assert self.phase == 'test', "Command arg phase should be 'test'. "
from tqdm import tqdm
self.net.eval()
predict = []
true = []
t1 = time.time()
for i, (image, mask) in tqdm(enumerate(dataloader)):
if self.cuda:
image = Variable(image.cuda(), volatile=True)
label_image = Variable(mask.cuda(), volatile=True)
else:
image = Variable(image, volatile=True)
label_image = Variable(mask, volatile=True)
# cls forward
out = self.net(image)
if isinstance(out, list):
out_max = out[-1]
if out_max.size(2) != label_image.size(2):
out = self.interp(out_max)
else:
if out.size(2) != image.size(2):
out = self.interp(out)
# out [bs * num_tta, c, h, w]
if self.args.use_tta:
num_tta = len(tta_config)
# out = F.softmax(out, dim=1)
out = detta_score(
out.view(num_tta, -1, self.args.num_classes, out.size(2),
out.size(3))) # [num_tta, bs, nclass, H, W]
out = out.mean(dim=0) # [bs, nclass, H, W]
out = F.softmax(out)
if self.args.aug == 'heng':
out = out[:, :, 11:11 + 202, 11:11 + 202]
predict.extend([
resize(pred[1].data.cpu().numpy(), (101, 101)) for pred in out
])
# predict.extend([pred[1, :101, :101].data.cpu().numpy() for pred in out])
# pred.extend(out.data.cpu().numpy())
true.extend(label_image.data.cpu().numpy())
# pred_all = np.argmax(np.array(pred), 1)
for t in np.arange(0.05, 0.51, 0.01):
pred_all = np.array(predict) > t
true_all = np.array(true).astype(np.int)
# new_iou = intersection_over_union(true_all, pred_all)
# new_iou_t = intersection_over_union_thresholds(true_all, pred_all)
mean_iou, iou_t = mIoU(true_all, pred_all)
print('threshold : {:.4f}'.format(t))
print('mean IoU : {:.4f}, IoU threshold : {:.4f}'.format(
mean_iou, iou_t))
return predict, true
def run_epoch(self, dataloader, writer, epoch, train=True, metrics=True):
if train:
self.net.train()
flag = 'train'
else:
self.net.eval()
flag = 'val'
t2 = time.time()
for image, mask in dataloader:
if train and self.lr_policy != 'step':
adjust_learning_rate(self.args.lr, self.optimizer, self.iters,
self.iterations * len(dataloader), 0.9,
self.cyclic_m, self.lr_policy)
self.iters += 1
if self.cuda:
image = Variable(image.cuda(), volatile=(not train))
label_image = Variable(mask.cuda(), volatile=(not train))
else:
image = Variable(image, volatile=(not train))
label_image = Variable(mask, volatile=(not train))
# cls forward
out = self.net(image)
if isinstance(out, list):
out_max = None
loss = 0.0
for i, out_scale in enumerate(out):
if out_scale.size(2) != label_image.size(2):
out_scale = self.interp(out_scale)
if i == (len(out) - 1):
out_max = out_scale
loss += self.criterion(out_scale, label_image)
label_image_np = label_image.data.cpu().numpy()
sig_out_np = out_max.data.cpu().numpy()
acc = accuracy(label_image_np, np.argmax(sig_out_np, 1))
self.pred[flag].extend(sig_out_np)
self.true[flag].extend(label_image_np)
self.losses[flag].append(loss.data[0])
self.acces[flag].append(acc)
else:
if out.size(-1) != label_image.size(-1):
out = self.interp(out)
loss = self.criterion(out, label_image)
label_image_np = label_image.data.cpu().numpy()
sig_out_np = out.data.cpu().numpy()
acc = accuracy(label_image_np, np.argmax(sig_out_np, 1))
self.pred[flag].extend(sig_out_np)
self.true[flag].extend(label_image_np)
self.losses[flag].append(loss.data[0])
self.acces[flag].append(acc)
if train:
self.optimizer.zero_grad()
loss.backward()
self.optimizer.step()
if metrics:
n = len(self.losses[flag])
loss = sum(self.losses[flag]) / n
scalars = [
loss,
]
names = [
'loss',
]
write_scalars(writer, scalars, names, epoch, tag=flag + '_loss')
all_acc = sum(self.acces[flag]) / n
scalars = [
all_acc,
]
names = [
'all_acc',
]
write_scalars(writer, scalars, names, epoch, tag=flag + '_acc')
# all_score = sum(self.scores[flag]) / n
# scalars = [all_score, ]
# names = ['all_score', ]
# write_scalars(writer, scalars, names, epoch, tag=flag + '_score')
pred_all = np.argmax(np.array(self.pred[flag]), 1)
true_all = np.array(self.true[flag]).astype(np.int)
mean_iou, iou_t = mIoU(true_all, pred_all)
# new_iou = intersection_over_union(true_all, pred_all)
# new_iou_t = intersection_over_union_thresholds(true_all, pred_all)
scalars = [
mean_iou,
iou_t,
]
names = [
'mIoU',
'mIoU_threshold',
]
write_scalars(writer, scalars, names, epoch, tag=flag + '_IoU')
scalars = [
self.optimizer.param_groups[0]['lr'],
]
names = [
'learning_rate',
]
write_scalars(writer, scalars, names, epoch, tag=flag + '_lr')
print(
'{} loss: {:.4f} | acc: {:.4f} | mIoU: {:.4f} | mIoU_threshold: {:.4f} | n_iter: {} | learning_rate: {} | time: {:.2f}'
.format(flag, loss, all_acc, mean_iou, iou_t, epoch,
self.optimizer.param_groups[0]['lr'],
time.time() - t2))
self.losses[flag] = []
self.pred[flag] = []
self.true[flag] = []
self.acces[flag] = []
self.scores[flag] = []
if (not train) and (iou_t >= self.best_val):
if self.args.ms:
if self.args.mGPUs:
self.save_network(self.net.module.Scale,
self.args.model_name,
epoch=epoch,
label='best')
else:
self.save_network(self.net.Scale,
self.args.model_name,
epoch=epoch,
label='best')
else:
if self.args.mGPUs:
self.save_network(self.net.module,
self.args.model_name,
epoch=epoch,
label='best')
else:
self.save_network(self.net,
self.args.model_name,
epoch=epoch,
label='best')
print(
'val improve from {:.4f} to {:.4f} saving in best val_iteration {}'
.format(self.best_val, iou_t, epoch))
self.best_val = iou_t
self.count = 0
if (not train) and (self.best_val - iou_t > 0.003) and (
self.count < 10) and (self.lr_policy == 'step'):
self.count += 1
if (not train) and (self.count >= 10) and (self.lr_policy
== 'step'):
self._adjust_learning_rate(epoch)
self.count = 0
def train_val(self, dataloader_train, dataloader_val, writer):
val_epoch = 0
for epoch in range(self.iterations):
if (self.lr_policy == 'cyclic') and (
epoch % int(self.iterations / self.cyclic_m) == 0):
print('-------start cycle {}------------'.format(
epoch // int(self.iterations / self.cyclic_m)))
self.best_val = 0.0
self.run_epoch(dataloader_train,
writer,
epoch,
train=True,
metrics=True)
self.run_epoch(dataloader_val,
writer,
val_epoch,
train=False,
metrics=True)
val_epoch += 1
if (epoch + 1) % self.args.save_freq == 0:
if self.args.ms:
if self.args.mGPUs:
self.save_network(
self.net.module.Scale,
self.args.model_name,
epoch=val_epoch,
)
else:
self.save_network(
self.net.Scale,
self.args.model_name,
epoch=val_epoch,
)
else:
if self.args.mGPUs:
self.save_network(
self.net.module,
self.args.model_name,
epoch=val_epoch,
)
else:
self.save_network(
self.net,
self.args.model_name,
epoch=val_epoch,
)
print('saving in val_iteration {}'.format(val_epoch))
def train(datafile):
# model = ResUNet(n_classes=2)
model = UNet(n_channels=3, n_classes=2)
if torch.cuda.is_available():
model.cuda()
# criterion = SoftDiceLoss(batch_dice=True)
criterion_CE = nn.CrossEntropyLoss()
criterion_SD = SoftDiceLoss()
optimizer = torch.optim.SGD(model.parameters(),
lr=LEARNING_RATE,
momentum=0.9)
vis = PytorchVisdomLogger(name="GIANA", port=8080)
giana_transform, giana_train_loader, giana_valid_loader = giana_data_pipeline(
datafile)
for epoch in range(EPOCHS):
iteration = 0
for iteration, (images, labels) in enumerate(giana_train_loader):
# print('TRAIN', images.shape, labels.shape)
images, labels = giana_transform.apply_transform([images, labels])
labels_onehot = make_one_hot(labels, 2)
# for images, labels in giana_pool.imap_unordered(giana_transform.apply_transform, giana_iter):
if torch.cuda.is_available():
images = images.cuda()
labels_onehot = labels_onehot.cuda()
optimizer.zero_grad()
model.train()
predictions = model(images)
predictions_softmax = F.softmax(predictions, dim=1)
# loss = 0.75 * criterion_CE(predictions, labels.squeeze().cuda().long()) + 0.25 * criterion_SD(predictions_softmax, labels_onehot)
loss = criterion_CE(predictions, labels.squeeze().cuda().long())
# loss = criterion_SD(predictions_softmax, labels_onehot)
loss.backward()
optimizer.step()
# iteration += 1
if iteration % PRINT_AFTER_ITERATIONS == 0:
# print('Epoch: {0}, Iteration: {1}, Loss: {2}, Valid dice score: {3}'.format(epoch, iteration, loss, score))
print('Epoch: {0}, Iteration: {1}, Loss: {2}'.format(
epoch, iteration, loss))
image_args = {'normalize': True, 'range': (0, 1)}
# viz.show_image_grid(images=images.cpu()[:, 0, ].unsqueeze(1), name='Images_train', image_args=image_args)
vis.show_image_grid(
images=predictions_softmax.cpu()[:, 0, ].unsqueeze(1),
name='Predictions_1',
image_args=image_args)
vis.show_image_grid(
images=predictions_softmax.cpu()[:, 1, ].unsqueeze(1),
name='Predictions_2',
image_args=image_args)
vis.show_image_grid(images=labels.cpu(), name='Ground truth')
vis.show_value(value=loss.item(),
name='Train_Loss',
label='Loss',
counter=epoch + (iteration / MAX_ITERATIONS))
if iteration == MAX_ITERATIONS:
break
score = model.predict(giana_valid_loader, SCORE_TYPE,
MAX_VALIDATION_ITERATIONS, vis)
vis.show_value(value=np.asarray([score]),
name='TestDiceScore',
label='Dice',
counter=epoch)
print(
'\n--------------------------------------------------\nEpoch: {0}, Score: {1}, Loss: {2}\n--------------------------------------------------\n'
.format(epoch, score, loss))
from model.train import train
from model.unet import UNet
from model.dataloader import testloader
from model.evaluate import evaluate
import torch
COLAB = True
BATCH_SIZE = 1
PATH = 'unet_augment.pt'
# PATH = '../drive/My Drive/Colab Notebooks/im2height.pt'
test_loader = testloader(colab=COLAB, batch_size=BATCH_SIZE)
net = UNet()
net.load_state_dict(torch.load(PATH))
if torch.cuda.is_available():
net.cuda()
criterion = torch.nn.L1Loss()
evaluate(net, test_loader, criterion=criterion)
