class Solver(object):
def __init__(self, config, train_loader, valid_loader, test_loader):
# Data loader
self.train_loader = train_loader
self.valid_loader = valid_loader
self.test_loader = test_loader
# Models
self.unet = None
self.optimizer = None
self.img_ch = config.img_ch
self.output_ch = config.output_ch
#self.criterion = torch.nn.BCELoss()
self.criterion = nn.CrossEntropyLoss()
self.augmentation_prob = config.augmentation_prob
# Hyper-parameters
self.lr = config.lr
self.beta1 = config.beta1
self.beta2 = config.beta2
# Training settings
self.num_epochs = config.num_epochs
self.num_epochs_decay = config.num_epochs_decay
self.batch_size = config.batch_size
# Step size
self.log_step = config.log_step
self.val_step = config.val_step
# Path
self.model_path = config.model_path
self.result_path = config.result_path
self.mode = config.mode
self.device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
self.model_type = config.model_type
self.t = config.t
self.build_model()
def build_model(self):
"""Build generator and discriminator."""
if self.model_type =='U_Net':
self.unet = U_Net(img_ch=self.img_ch,output_ch=self.output_ch)
elif self.model_type =='R2U_Net':
self.unet = R2U_Net(img_ch=self.img_ch,output_ch=self.output_ch,t=self.t)
elif self.model_type =='AttU_Net':
self.unet = AttU_Net(img_ch=self.img_ch,output_ch=self.output_ch)
elif self.model_type == 'R2AttU_Net':
self.unet = R2AttU_Net(img_ch=self.img_ch,output_ch=self.output_ch,t=self.t)
self.optimizer = optim.Adam(list(self.unet.parameters()),
self.lr, [self.beta1, self.beta2])
self.unet.to(self.device)
# self.print_network(self.unet, self.model_type)
def print_network(self, model, name):
"""Print out the network information."""
num_params = 0
for p in model.parameters():
num_params += p.numel()
print(model)
print(name)
print("The number of parameters: {}".format(num_params))
def to_data(self, x):
"""Convert variable to tensor."""
if torch.cuda.is_available():
x = x.cpu()
return x.data
def update_lr(self, g_lr, d_lr):
for param_group in self.optimizer.param_groups:
param_group['lr'] = lr
def reset_grad(self):
"""Zero the gradient buffers."""
self.unet.zero_grad()
def compute_accuracy(self,SR,GT):
SR_flat = SR.view(-1)
GT_flat = GT.view(-1)
acc = GT_flat.data.cpu()==(SR_flat.data.cpu()>0.5)
def tensor2img(self,x):
img = (x[:,0,:,:]>x[:,1,:,:]).float()
img = img*255
return img
def train(self):
"""Train encoder, generator and discriminator."""
#====================================== Training ===========================================#
#===========================================================================================#
unet_path = os.path.join(self.model_path, '%s-%d-%.4f-%d-%.4f.pkl' %(self.model_type,self.num_epochs,self.lr,self.num_epochs_decay,self.augmentation_prob))
# U-Net Train
if os.path.isfile(unet_path):
# Load the pretrained Encoder
self.unet.load_state_dict(torch.load(unet_path))
print('%s is Successfully Loaded from %s'%(self.model_type,unet_path))
else:
# Train for Encoder
lr = self.lr
best_unet_score = 0.
for epoch in range(self.num_epochs):
self.unet.train(True)
epoch_loss = 0
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
for i, (images, GT) in enumerate(self.train_loader):
# GT : Ground Truth
images = images.to(self.device)
GT = GT.to(self.device)
# SR : Segmentation Result
SR = self.unet(images)
#SR_probs = F.sigmoid(SR)
#print(SR_probs.size()); exit(1)
#SR_flat = SR_probs.view(SR_probs.size(0),-1)
#GT_flat = GT.view(GT.size(0),-1)
loss = self.criterion(SR, GT)
epoch_loss += loss.item()
# Backprop + optimize
self.reset_grad()
loss.backward()
self.optimizer.step()
acc += get_accuracy(SR,GT)
SE += get_sensitivity(SR,GT)
SP += get_specificity(SR,GT)
PC += get_precision(SR,GT)
F1 += get_F1(SR,GT)
JS += get_JS(SR,GT)
DC += get_DC(SR,GT)
length += images.size(0)
acc = acc/length
SE = SE/length
SP = SP/length
PC = PC/length
F1 = F1/length
JS = JS/length
DC = DC/length
# Print the log info
print('Epoch [%d/%d], Loss: %.4f, \n[Training] Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f' % (
epoch+1, self.num_epochs, \
epoch_loss,\
acc,SE,SP,PC,F1,JS,DC))
# Decay learning rate
if (epoch+1) > (self.num_epochs - self.num_epochs_decay):
lr -= (self.lr / float(self.num_epochs_decay))
for param_group in self.optimizer.param_groups:
param_group['lr'] = lr
print ('Decay learning rate to lr: {}.'.format(lr))
#===================================== Validation ====================================#
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length=0
for i, (images, GT) in enumerate(self.valid_loader):
images = images.to(self.device)
GT = GT.to(self.device)
#SR = F.sigmoid(self.unet(images))
SR = self.unet(images)
acc += get_accuracy(SR,GT)
SE += get_sensitivity(SR,GT)
SP += get_specificity(SR,GT)
PC += get_precision(SR,GT)
F1 += get_F1(SR,GT)
JS += get_JS(SR,GT)
DC += get_DC(SR,GT)
length += images.size(0)
acc = acc/length
SE = SE/length
SP = SP/length
PC = PC/length
F1 = F1/length
JS = JS/length
DC = DC/length
unet_score = JS + DC
print('[Validation] Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f'%(acc,SE,SP,PC,F1,JS,DC))
'''
torchvision.utils.save_image(images.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_image.png'%(self.model_type,epoch+1)))
torchvision.utils.save_image(SR.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_SR.png'%(self.model_type,epoch+1)))
torchvision.utils.save_image(GT.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_GT.png'%(self.model_type,epoch+1)))
'''
# Save Best U-Net model
if unet_score > best_unet_score:
best_unet_score = unet_score
best_epoch = epoch
best_unet = self.unet.state_dict()
print('Best %s model score : %.4f'%(self.model_type,best_unet_score))
torch.save(best_unet,unet_path)
#===================================== Test ====================================#
del self.unet
del best_unet
self.build_model()
self.unet.load_state_dict(torch.load(unet_path))
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length=0
for i, (images, GT) in enumerate(self.valid_loader):
images = images.to(self.device)
GT = GT.to(self.device)
#SR = F.sigmoid(self.unet(images))
SR = self.unet(images)
acc += get_accuracy(SR,GT)
SE += get_sensitivity(SR,GT)
SP += get_specificity(SR,GT)
PC += get_precision(SR,GT)
F1 += get_F1(SR,GT)
JS += get_JS(SR,GT)
DC += get_DC(SR,GT)
length += images.size(0)
acc = acc/length
SE = SE/length
SP = SP/length
PC = PC/length
F1 = F1/length
JS = JS/length
DC = DC/length
unet_score = JS + DC
f = open(os.path.join(self.result_path,'result.csv'), 'a', encoding='utf-8', newline='')
wr = csv.writer(f)
wr.writerow([self.model_type,acc,SE,SP,PC,F1,JS,DC,self.lr,best_epoch,self.num_epochs,self.num_epochs_decay,self.augmentation_prob])
f.close()
# - For 2 classes, use n_classes=1
# - For N > 2 classes, use n_classes=N
#net = UNet(n_channels=3, n_classes=1, bilinear=True)
#net = R2U_Net(n_channels=1, n_classes=1, bilinear=True)
net = AttU_Net()
'''
logging.info(f'Network:\n'
f'\t{net.n_channels} input channels\n'
f'\t{net.n_classes} output channels (classes)\n'
f'\t{"Bilinear" if net.bilinear else "Transposed conv"} upscaling')
'''
if args.load:
net.load_state_dict(torch.load(args.load, map_location=device))
logging.info(f'Model loaded from {args.load}')
net.to(device=device)
# faster convolutions, but more memory
# cudnn.benchmark = True
try:
train_net(net=net,
epochs=args.epochs,
batch_size=args.batchsize,
lr=args.lr,
device=device,
img_scale=args.scale,
val_percent=args.val / 100)
except KeyboardInterrupt:
torch.save(net.state_dict(), 'INTERRUPTED.pth')
logging.info('Saved interrupt')
try:
class Solver(object):
def __init__(self, config, train_loader, valid_loader, test_loader):
# Data loader
self.train_loader = train_loader
self.valid_loader = valid_loader
self.test_loader = test_loader
# Models
self.unet = None
self.optimizer = None
self.img_ch = config.img_ch
self.output_ch = config.output_ch
self.criterion = dice_loss()
self.augmentation_prob = config.augmentation_prob
# Hyper-parameters
self.lr = config.lr
self.beta1 = config.beta1
self.beta2 = config.beta2
# Training settings
self.num_epochs = config.num_epochs
self.num_epochs_decay = config.num_epochs_decay
self.batch_size = config.batch_size
# Step size
self.log_step = config.log_step
self.val_step = config.val_step
# Path
self.model_path = config.model_path
self.result_path = config.result_path
self.mode = config.mode
self.device = torch.device(
'cuda' if torch.cuda.is_available() else 'cpu')
self.model_type = config.model_type
self.t = config.t
self.build_model()
def build_model(self):
"""Build generator and discriminator."""
if self.model_type == 'U_Net':
self.unet = U_Net(img_ch=3, output_ch=2)
elif self.model_type == 'R2U_Net':
self.unet = R2U_Net(img_ch=3, output_ch=1, t=self.t)
elif self.model_type == 'AttU_Net':
self.unet = AttU_Net(img_ch=3, output_ch=1)
elif self.model_type == 'R2AttU_Net':
self.unet = R2AttU_Net(img_ch=3, output_ch=1, t=self.t)
self.optimizer = optim.Adam(list(self.unet.parameters()), self.lr,
[self.beta1, self.beta2])
self.unet.to(self.device)
# self.print_network(self.unet, self.model_type)
def print_network(self, model, name):
"""Print out the network information."""
num_params = 0
for p in model.parameters():
num_params += p.numel()
print(model)
print(name)
print("The number of parameters: {}".format(num_params))
def to_data(self, x):
"""Convert variable to tensor."""
if torch.cuda.is_available():
x = x.cpu()
return x.data
def update_lr(self, g_lr, d_lr):
for param_group in self.optimizer.param_groups:
param_group['lr'] = lr
def reset_grad(self):
"""Zero the gradient buffers."""
self.unet.zero_grad()
def compute_accuracy(self, SR, GT):
SR_flat = SR.view(-1)
GT_flat = GT.view(-1)
acc = GT_flat.data.cpu() == (SR_flat.data.cpu() > 0.5)
def tensor2img(self, x):
img = (x[:, 0, :, :] > x[:, 1, :, :]).float()
img = img * 255
return img
def train(self):
"""Train encoder, generator and discriminator."""
#====================================== Training ===========================================#
#===========================================================================================#
unet_path = os.path.join(
self.model_path, '%s-%d-%.4f-%d-%.4f.pkl' %
(self.model_type, self.num_epochs, self.lr, self.num_epochs_decay,
self.augmentation_prob))
# U-Net Train
if os.path.isfile(unet_path):
# Load the pretrained Encoder
self.unet.load_state_dict(torch.load(unet_path))
print('%s is Successfully Loaded from %s' %
(self.model_type, unet_path))
else:
# Train for Encoder
lr = self.lr
best_unet_score = 0.
for epoch in range(self.num_epochs):
self.unet.train(True)
epoch_loss = 0
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
for i, (images, GT) in enumerate(self.train_loader):
# GT : Ground Truth
if i == 1:
gt = GT.numpy()
# print (gt.max())
images = images.to(self.device)
GT = GT.to(self.device).squeeze(1)
# SR : Segmentation Result
SR = self.unet(images)
SR_probs = F.softmax(SR, dim=1)
# SR_probs = F.softmax(SR)
SR_flat = SR_probs
GT_flat = GT
#print(SR_flat.requires_grad,GT_flat.requires_grad)
loss = self.criterion(SR_flat, GT_flat.long())
#print(loss)
epoch_loss += loss.item()
# Backprop + optimize
self.reset_grad()
loss.backward()
self.optimizer.step()
acc += get_accuracy(SR_probs[:, 1:2, :, :], GT)
SE += get_sensitivity(SR_probs[:, 1:2, :, :], GT)
SP += get_specificity(SR_probs[:, 1:2, :, :], GT)
PC += get_precision(SR_probs[:, 1:2, :, :], GT)
F1 += get_F1(SR_probs[:, 1:2, :, :], GT)
JS += get_JS(SR_probs[:, 1:2, :, :], GT)
DC += get_DC(SR_probs[:, 1:2, :, :], GT)
length += images.size(0)
if i % 50 == 0 or i == len(self.train_loader) - 1:
vis_dir = './train_viz/'
probs = SR_probs
y = GT
images = images.permute(0, 2, 3, 1)
os.system('rm -rf %s' % (vis_dir))
os.system('mkdir %s' % (vis_dir))
for j in range(0, images.size()[0]):
img = images[
j, :, :, :].data.cpu().numpy().squeeze()
img -= np.min(img)
img /= np.max(img) / 255.
img = img[:, :, ::-1]
img = img.astype(np.uint8)
#img = cv2.cvtColor(img.astype(np.uint8), cv2.COLOR_GRAY2BGR)
viz = viz_img(img, y[j, :, :], probs[j, :, :, :])
path = vis_dir + '%d.jpg' % (j)
cv2.imwrite(path, viz)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
epoch_loss = epoch_loss / length
# Print the log info
print('Epoch [%d/%d], Loss: %.4f, \n[Training] Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f' % (
epoch+1, self.num_epochs, \
epoch_loss,\
acc,SE,SP,PC,F1,JS,DC))
# Decay learning rate
if (epoch + 1) > (self.num_epochs - self.num_epochs_decay):
lr -= (self.lr / float(self.num_epochs_decay))
for param_group in self.optimizer.param_groups:
param_group['lr'] = lr
print('Decay learning rate to lr: {}.'.format(lr))
#===================================== Validation ====================================#
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
for i, (images, GT) in enumerate(self.valid_loader):
images = images.to(self.device)
GT = GT.to(self.device).squeeze(1)
SR = (self.unet(images))
SR_probs = F.softmax(SR, dim=1)
acc += get_accuracy(SR_probs[:, 1:2, :, :], GT)
SE += get_sensitivity(SR_probs[:, 1:2, :, :], GT)
SP += get_specificity(SR_probs[:, 1:2, :, :], GT)
PC += get_precision(SR_probs[:, 1:2, :, :], GT)
F1 += get_F1(SR_probs[:, 1:2, :, :], GT)
JS += get_JS(SR_probs[:, 1:2, :, :], GT)
DC += get_DC(SR_probs[:, 1:2, :, :], GT)
length += images.size(0)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
unet_score = JS + DC
print(
'[Validation] Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f'
% (acc, SE, SP, PC, F1, JS, DC))
'''
torchvision.utils.save_image(images.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_image.png'%(self.model_type,epoch+1)))
torchvision.utils.save_image(SR.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_SR.png'%(self.model_type,epoch+1)))
torchvision.utils.save_image(GT.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_GT.png'%(self.model_type,epoch+1)))
'''
#Save Best U-Net model
if unet_score > best_unet_score:
best_unet_score = unet_score
best_epoch = epoch
best_unet = self.unet.state_dict()
print('Best %s model score : %.4f' %
(self.model_type, best_unet_score))
torch.save(best_unet, unet_path)
#===================================== Test ====================================#
del self.unet
# del best_unet
self.build_model()
self.unet.load_state_dict(torch.load(unet_path))
self.unet.train(False)
self.unet.eval()
class Solver(object):
def __init__(self, config, train_loader, valid_loader, test_loader):
# Data loader
self.train_loader = train_loader
self.valid_loader = valid_loader
self.test_loader = test_loader
# Models
self.unet = None
self.optimizer = None
self.img_ch = config.img_ch
self.output_ch = config.output_ch
self.bce_loss = torch.nn.BCELoss()
self.augmentation_prob = config.augmentation_prob
# Hyper-parameters
self.lr = config.lr
self.beta1 = config.beta1
self.beta2 = config.beta2
self.lamda = config.lamda
# Training settings
self.num_epochs = config.num_epochs
self.num_epochs_decay = config.num_epochs_decay
self.batch_size = config.batch_size
self.save_model = config.save_model
# Plots
self.loss_history = hl.History()
self.acc_history = hl.History()
self.dc_history = hl.History()
self.canvas = hl.Canvas()
# Step size for plotting
self.log_step = config.log_step
self.val_step = config.val_step
# Paths
self.model_path = config.model_path
self.result_path = config.result_path
self.mode = config.mode
# Model training properties
self.device = torch.device(
'cuda' if torch.cuda.is_available() else 'cpu')
self.model_type = config.model_type
self.t = config.t
self.build_model()
def build_model(self):
# Load required model
if self.model_type == 'U_Net':
self.unet = U_Net(img_ch=3, output_ch=1)
elif self.model_type == 'R2U_Net':
self.unet = R2U_Net(img_ch=3, output_ch=1, t=self.t)
elif self.model_type == 'AttU_Net':
self.unet = AttU_Net(img_ch=3, output_ch=1)
elif self.model_type == 'R2AttU_Net':
self.unet = R2AttU_Net(img_ch=3, output_ch=1, t=self.t)
# Load optimizer
self.optimizer = optim.Adam(list(self.unet.parameters()), self.lr,
[self.beta1, self.beta2])
# Move model to device
self.unet.to(self.device)
def print_network(self, model, name):
# Print out the network information
num_params = 0
for p in model.parameters():
num_params += p.numel()
print(model)
print(name)
print("The number of parameters: {}".format(num_params))
def dice_loss(self, pred, target):
pred = pred.view(32, -1)
target = target.view(32, -1)
numerator = 2 * torch.sum(pred * target)
denominator = torch.sum(pred + target)
return 1 - (numerator + 1) / (denominator + 1)
def train(self):
# Debugging (Uncomment following lines)
# a = torch.zeros((4, 3, 224, 224))
# self.unet(a.to(self.device))
unet_path = os.path.join(self.model_path, '%s-%d-%.4f-%d-%.4f.pkl' %(self.model_type,self.num_epochs,\
self.lr,self.num_epochs_decay,\
self.augmentation_prob))
# U-Net Train
if os.path.isfile(unet_path):
# Load the pretrained Encoder
self.unet.load_state_dict(torch.load(unet_path))
print('%s is Successfully Loaded from %s' %
(self.model_type, unet_path))
else:
# Train for Encoder
lr = self.lr
best_unet_score = 0.
for epoch in range(self.num_epochs):
self.unet.train(True)
epoch_loss = 0
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
for i, (images, GT) in enumerate(self.train_loader):
# GT : Ground Truth
images = images.to(self.device)
GT = GT.to(self.device)
# Zero grad
self.optimizer.zero_grad()
# SR : Segmentation Result
SR = self.unet(images)
SR_probs = torch.sigmoid(SR)
# Convert to 1D tensor for loss calculation
SR_flat = SR_probs.view(SR_probs.size(0), -1)
GT_flat = GT.view(GT.size(0), -1)
# Compute loss
loss = self.bce_loss(
SR_flat, GT_flat) + self.lamda * self.dice_loss(
SR_flat, GT_flat)
epoch_loss += loss.item()
# Backprop
loss.backward()
self.optimizer.step()
# Get metrics
acc += get_accuracy(SR_probs, GT)
SE += get_sensitivity(SR_probs, GT)
SP += get_specificity(SR_probs, GT)
PC += get_precision(SR_probs, GT)
F1 += get_F1(SR_probs, GT)
JS += get_JS(SR_probs, GT)
DC += get_DC(SR_probs, GT)
length = i
length = (i + 1)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
train_dc = DC
train_acc = acc
train_loss = epoch_loss / length
# # Decay learning rate
# if (epoch+1) > (self.num_epochs - self.num_epochs_decay):
# lr -= (self.lr / float(self.num_epochs_decay))
# for param_group in self.optimizer.param_groups:
# param_group['lr'] = lr
# print ('Decay learning rate to lr: {}.'.format(lr))
# VALIDATION
with torch.no_grad():
epoch_loss = 0
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
for i, (images, GT) in enumerate(self.valid_loader):
images = images.to(self.device)
GT = GT.to(self.device)
SR = torch.sigmoid(self.unet(images))
# Convert to 1D tensor for loss calculation
SR_flat = SR.view(SR.size(0), -1)
GT_flat = GT.view(GT.size(0), -1)
# Compute loss
loss = self.bce_loss(
SR_flat, GT_flat) + self.lamda * self.dice_loss(
SR_flat, GT_flat)
epoch_loss += loss.item()
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC += get_DC(SR, GT)
length = i
length = (i + 1)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
unet_score = JS + DC
valid_dc = DC
valid_acc = acc
valid_loss = epoch_loss / length
self.loss_history.log(epoch + 1,
train_loss=train_loss,
valid_loss=valid_loss)
self.acc_history.log(epoch + 1,
train_acc=train_acc,
valid_acc=valid_acc)
self.dc_history.log(epoch + 1,
train_dc=train_dc,
valid_dc=valid_dc)
with self.canvas:
self.canvas.draw_plot(
[
self.loss_history['train_loss'],
self.loss_history['valid_loss']
],
labels=['Train Loss', 'Valid loss'])
self.canvas.draw_plot(
[
self.acc_history['train_acc'],
self.acc_history['valid_acc']
],
labels=['Train Acc', 'Valid Acc'])
self.canvas.draw_plot(
[
self.dc_history['train_dc'],
self.dc_history['valid_dc']
],
labels=['Train Dice Coeff', 'Valid Dice Coeff'])
grid_images = torch.cat([(images + 1) / 2,
torch.cat([SR, SR, SR], dim=1),
torch.cat([GT, GT, GT], dim=1)])
grid = torchvision.utils.make_grid(grid_images, nrow=4)
torchvision.utils.save_image(grid, \
os.path.join(self.result_path,'%s_valid_%d_image.png'%\
(self.model_type,epoch+1)))
# Save Best U-Net model
if self.save_model:
if unet_score > best_unet_score:
best_unet_score = unet_score
best_epoch = epoch
best_unet = self.unet.state_dict()
print('Best %s model score : %.4f' %
(self.model_type, best_unet_score))
torch.save(best_unet, unet_path)
def test(self):
del self.unet
del best_unet
self.build_model()
self.unet.load_state_dict(torch.load(unet_path))
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
for i, (images, GT) in enumerate(self.valid_loader):
images = images.to(self.device)
GT = GT.to(self.device)
SR = torch.sigmoid(self.unet(images))
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC += get_DC(SR, GT)
length += images.size(0)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
unet_score = JS + DC
f = open(os.path.join(self.result_path, 'result.csv'),
'a',
encoding='utf-8',
newline='')
wr = csv.writer(f)
wr.writerow([
self.model_type, acc, SE, SP, PC, F1, JS, DC, self.lr, best_epoch,
self.num_epochs, self.num_epochs_decay, self.augmentation_prob
])
f.close()
class Solver(object):
def __init__(self, config, train_loader, valid_loader, test_loader):
# Data loader
self.train_loader = train_loader
self.valid_loader = valid_loader
self.test_loader = test_loader
# Models
self.unet = None
self.optimizer = None
self.img_ch = config.img_ch
self.output_ch = config.output_ch
self.criterion = torch.nn.BCELoss()
self.augmentation_prob = config.augmentation_prob
# Hyper-parameters
self.lr = config.lr
self.beta1 = config.beta1
self.beta2 = config.beta2
# Training settings
self.num_epochs = config.num_epochs
self.num_epochs_decay = config.num_epochs_decay
self.batch_size = config.batch_size
# Step size
self.log_step = config.log_step
self.val_step = config.val_step
# Path
self.model_path = config.model_path
self.result_path = config.result_path
self.mode = config.mode
self.device = torch.device(
'cuda' if torch.cuda.is_available() else 'cpu')
self.model_type = config.model_type
self.t = config.t
self.build_model()
def build_model(self):
"""Build generator and discriminator."""
if self.model_type == 'U_Net':
self.unet = U_Net(img_ch=3, output_ch=1)
elif self.model_type == 'R2U_Net':
self.unet = R2U_Net(img_ch=3, output_ch=1, t=self.t)
elif self.model_type == 'AttU_Net':
self.unet = AttU_Net(img_ch=3, output_ch=1)
elif self.model_type == 'R2AttU_Net':
self.unet = R2AttU_Net(img_ch=3, output_ch=1, t=self.t)
self.optimizer = optim.Adam(list(self.unet.parameters()), self.lr,
[self.beta1, self.beta2])
self.unet.to(self.device)
def reset_grad(self):
"""Zero the gradient buffers."""
self.unet.zero_grad()
def train(self):
"""Train encoder, generator and discriminator."""
#====================================== Training ===========================================#
#===========================================================================================#
unet_path = os.path.join(
self.model_path, '%s-%d-%.4f-%d-%.4f.pkl' %
(self.model_type, self.num_epochs, self.lr, self.num_epochs_decay,
self.augmentation_prob))
print(unet_path)
# U-Net Train
if os.path.isfile(unet_path):
# Load the pretrained Encoder
self.unet.load_state_dict(torch.load(unet_path))
print('%s is Successfully Loaded from %s' %
(self.model_type, unet_path))
else:
# Train for Encoder
lr = self.lr
best_unet_score = 0.
for epoch in range(self.num_epochs):
self.unet.train(True)
epoch_loss = 0
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
for i, (images, GT) in enumerate(self.train_loader):
# GT : Ground Truth
images = images.to(self.device)
GT = GT.to(self.device)
# SR : Segmentation Result
SR = self.unet(images)
SR_probs = torch.sigmoid(SR)
SR_flat = SR_probs.view(SR_probs.size(0), -1)
GT_flat = GT.view(GT.size(0), -1)
loss = self.criterion(SR_flat, GT_flat)
epoch_loss += loss.item()
# Backprop + optimize
self.reset_grad()
loss.backward()
self.optimizer.step()
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC += get_DC(SR, GT)
length += images.size(0)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
# Print the log info
print('Epoch [%d/%d], Loss: %.4f, \n[Training] Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f' % (
epoch+1, self.num_epochs, \
epoch_loss,\
acc,SE,SP,PC,F1,JS,DC))
# Decay learning rate
if (epoch + 1) > (self.num_epochs - self.num_epochs_decay):
lr -= (self.lr / float(self.num_epochs_decay))
for param_group in self.optimizer.param_groups:
param_group['lr'] = lr
print('Decay learning rate to lr: {}.'.format(lr))
#===================================== Validation ====================================#
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
for i, (images, GT) in enumerate(self.valid_loader):
images = images.to(self.device)
GT = GT.to(self.device)
SR = torch.sigmoid(self.unet(images))
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC += get_DC(SR, GT)
length += images.size(0)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
unet_score = JS + DC
print(
'[Validation] Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f'
% (acc, SE, SP, PC, F1, JS, DC))
torchvision.utils.save_image(
images.data.cpu(),
os.path.join(
self.result_path, '%s_valid_%d_image.png' %
(self.model_type, epoch + 1)))
torchvision.utils.save_image(
SR.data.cpu(),
os.path.join(
self.result_path,
'%s_valid_%d_SR.png' % (self.model_type, epoch + 1)))
torchvision.utils.save_image(
GT.data.cpu(),
os.path.join(
self.result_path,
'%s_valid_%d_GT.png' % (self.model_type, epoch + 1)))
#Para guardar modelo y pesos ---- ACTUAL
epoca_actual = epoch
model_actual = self.unet.state_dict()
print('Actual %s model score : %.4f' %
(self.model_type, best_unet_score))
torch.save(
{
'epoch': epoca_actual,
'model_state_dict': model_actual,
###'optimizer_state_dict': optimizer.state_dict(), ## no reconoce
'loss': loss
},
unet_path)
# Save Best U-Net model ---- solo si es mejor que el modelo anterior
if unet_score > best_unet_score:
best_unet_score = unet_score
best_epoch = epoch
best_unet = self.unet.state_dict()
print('Best %s model score : %.4f' %
(self.model_type, best_unet_score))
torch.save(best_unet, unet_path)
#===================================== Test ====================================#
del self.unet
del best_unet
self.build_model()
self.unet.load_state_dict(torch.load(unet_path))
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
for i, (images, GT) in enumerate(self.valid_loader):
images = images.to(self.device)
GT = GT.to(self.device)
SR = torch.sigmoid(self.unet(images))
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC += get_DC(SR, GT)
length += images.size(0)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
unet_score = JS + DC
f = open(os.path.join(self.result_path, 'result.csv'),
'a',
encoding='utf-8',
newline='')
wr = csv.writer(f)
wr.writerow([
self.model_type, acc, SE, SP, PC, F1, JS, DC, self.lr,
best_epoch, self.num_epochs, self.num_epochs_decay,
self.augmentation_prob
])
f.close()
class Solver(object):
def __init__(self, config, train_loader, valid_loader, test_loader):
# Data loader
self.train_loader = train_loader
self.valid_loader = valid_loader
self.test_loader = test_loader
# Models
self.unet = None
self.optimizer = None
self.img_ch = config.img_ch
self.output_ch = config.output_ch
self.criterion = torch.nn.BCELoss()
self.augmentation_prob = config.augmentation_prob
# Hyper-parameters
self.lr = config.lr
self.beta1 = config.beta1
self.beta2 = config.beta2
# Training settings
self.num_epochs = config.num_epochs
self.num_epochs_decay = config.num_epochs_decay
self.batch_size = config.batch_size
# Step size
self.log_step = config.log_step
self.val_step = config.val_step
# Path
self.model_path = config.model_path
self.result_path = config.result_path
self.mode = config.mode
self.device = torch.device(
'cuda' if torch.cuda.is_available() else 'cpu')
self.model_type = config.model_type
self.t = config.t
self.build_model()
def build_model(self):
"""Build generator and discriminator."""
if self.model_type == 'U_Net':
self.unet = U_Net(img_ch=3, output_ch=1)
elif self.model_type == 'R2U_Net':
self.unet = R2U_Net(img_ch=3, output_ch=1, t=self.t)
elif self.model_type == 'AttU_Net':
self.unet = AttU_Net(img_ch=3, output_ch=1)
elif self.model_type == 'R2AttU_Net':
self.unet = R2AttU_Net(img_ch=3, output_ch=1, t=self.t)
self.optimizer = optim.Adam(list(self.unet.parameters()), self.lr,
[self.beta1, self.beta2])
self.unet.to(self.device)
# self.print_network(self.unet, self.model_type)
def print_network(self, model, name):
"""Print out the network information."""
num_params = 0
for p in model.parameters():
num_params += p.numel()
print(model)
print(name)
print("The number of parameters: {}".format(num_params))
def to_data(self, x):
"""Convert variable to tensor."""
if torch.cuda.is_available():
x = x.cpu()
return x.data
def update_lr(self, g_lr, d_lr):
for param_group in self.optimizer.param_groups:
param_group['lr'] = lr
def reset_grad(self):
"""Zero the gradient buffers."""
self.unet.zero_grad()
def compute_accuracy(self, SR, GT):
SR_flat = SR.view(-1)
GT_flat = GT.view(-1)
acc = GT_flat.data.cpu() == (SR_flat.data.cpu() > 0.5)
def tensor2img(self, x):
img = (x[:, 0, :, :] > x[:, 1, :, :]).float()
img = img * 255
return img
def train(self, pretrain, pre_bestscore):
"""Train encoder, generator and discriminator."""
#====================================== Training ===========================================#
#===========================================================================================#
if pretrain == 0:
unet_path = os.path.join(
self.model_path, '%s-%d-%.4f-%d-%.4f.pkl' %
(self.model_type, self.num_epochs, self.lr,
self.num_epochs_decay, self.augmentation_prob))
else:
unet_path = self.model_path
#print(unet_path)
# U-Net Train
if os.path.isfile(unet_path):
# Load the pretrained Encoder
self.unet.load_state_dict(torch.load(unet_path))
print('%s is Successfully Loaded from %s' %
(self.model_type, unet_path))
# Train for Encoder
lr = self.lr
best_unet_score = pre_bestscore
for epoch in range(self.num_epochs):
self.unet.train(True)
epoch_loss = 0
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
#print(self.train_loader)
for i, (images, GT, _, _) in enumerate(self.train_loader):
# GT : Ground Truth
#print(i, (images, GT))
images = images.to(self.device)
GT = GT.to(self.device)
#print(images.shape, GT.shape)
# SR : Segmentation Result
SR = self.unet(images)
#print(SR.shape)
SR_probs = F.sigmoid(SR)
SR_flat = SR_probs.view(SR_probs.size(0), -1)
GT_flat = GT.view(GT.size(0), -1)
loss = self.criterion(SR_flat, GT_flat)
epoch_loss += loss.item()
# Backprop + optimize
self.reset_grad()
loss.backward()
self.optimizer.step()
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC += get_DC(SR, GT)
length += images.size(0)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
# Print the log info
print('Epoch [%d/%d], Loss: %.4f, \n[Training] Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f' % (
epoch+1, self.num_epochs, \
epoch_loss,\
acc,SE,SP,PC,F1,JS,DC))
# Decay learning rate
if (epoch + 1) > (self.num_epochs - self.num_epochs_decay):
lr -= (self.lr / float(self.num_epochs_decay))
for param_group in self.optimizer.param_groups:
param_group['lr'] = lr
print('Decay learning rate to lr: {}.'.format(lr))
#===================================== Validation ====================================#
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
for i, (images, GT, _, _) in enumerate(self.valid_loader):
images = images.to(self.device)
GT = GT.to(self.device)
SR = self.unet(images)
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC += get_DC(SR, GT)
length += images.size(0)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
unet_score = JS + DC
print(
'[Validation] Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f'
% (acc, SE, SP, PC, F1, JS, DC))
'''
torchvision.utils.save_image(images.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_image.png'%(self.model_type,epoch+1)))
torchvision.utils.save_image(SR.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_SR.png'%(self.model_type,epoch+1)))
torchvision.utils.save_image(GT.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_GT.png'%(self.model_type,epoch+1)))
'''
# Save Best U-Net model
if unet_score > best_unet_score:
best_unet_score = unet_score
best_epoch = epoch
best_unet = self.unet.state_dict()
premodel_unet_path = unet_path[:-4] + '_pretrained' + '.pkl'
print(
'Best %s model score : %.4f unet_path is ' %
(self.model_type, best_unet_score), premodel_unet_path)
torch.save(best_unet, premodel_unet_path)
else:
# Train for Encoder
lr = self.lr
best_unet_score = 0.
for epoch in range(self.num_epochs):
self.unet.train(True)
epoch_loss = 0
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
#print(self.train_loader)
for i, (images, GT, _, _) in enumerate(self.train_loader):
# GT : Ground Truth
#print(i, (images, GT))
images = images.to(self.device)
GT = GT.to(self.device)
# SR : Segmentation Result
SR = self.unet(images)
SR_probs = F.sigmoid(SR)
SR_flat = SR_probs.view(SR_probs.size(0), -1)
GT_flat = GT.view(GT.size(0), -1)
loss = self.criterion(SR_flat, GT_flat)
epoch_loss += loss.item()
# Backprop + optimize
self.reset_grad()
loss.backward()
self.optimizer.step()
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC += get_DC(SR, GT)
length += images.size(0)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
# Print the log info
print('Epoch [%d/%d], Loss: %.4f, \n[Training] Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f' % (
epoch+1, self.num_epochs, \
epoch_loss,\
acc,SE,SP,PC,F1,JS,DC))
# Decay learning rate
if (epoch + 1) > (self.num_epochs - self.num_epochs_decay):
lr -= (self.lr / float(self.num_epochs_decay))
for param_group in self.optimizer.param_groups:
param_group['lr'] = lr
print('Decay learning rate to lr: {}.'.format(lr))
#===================================== Validation ====================================#
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
for i, (images, GT, _, _) in enumerate(self.valid_loader):
images = images.to(self.device)
GT = GT.to(self.device)
SR = self.unet(images)
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC += get_DC(SR, GT)
length += images.size(0)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
unet_score = JS + DC
print(
'[Validation] Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f'
% (acc, SE, SP, PC, F1, JS, DC))
'''
torchvision.utils.save_image(images.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_image.png'%(self.model_type,epoch+1)))
torchvision.utils.save_image(SR.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_SR.png'%(self.model_type,epoch+1)))
torchvision.utils.save_image(GT.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_GT.png'%(self.model_type,epoch+1)))
'''
# Save Best U-Net model
if unet_score > best_unet_score:
best_unet_score = unet_score
best_epoch = epoch
best_unet = self.unet.state_dict()
print('Best %s model score : %.4f' %
(self.model_type, best_unet_score))
torch.save(best_unet, unet_path)
#===================================== Test ====================================#
del self.unet
del best_unet
self.build_model()
self.unet.load_state_dict(torch.load(unet_path))
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
for i, (images, GT, _, _) in enumerate(self.valid_loader):
images = images.to(self.device)
GT = GT.to(self.device)
SR = self.unet(images)
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC += get_DC(SR, GT)
length += images.size(0)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
unet_score = JS + DC
f = open(os.path.join(self.result_path, 'result.csv'),
'a',
encoding='utf-8',
newline='')
wr = csv.writer(f)
wr.writerow([
self.model_type, acc, SE, SP, PC, F1, JS, DC, self.lr,
best_epoch, self.num_epochs, self.num_epochs_decay,
self.augmentation_prob
])
f.close()
def test(self,
unet_path,
result_savepath,
mask_savepath,
pre_savepath,
threshold=0.5):
self.build_model()
self.unet.load_state_dict(torch.load(unet_path))
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
num_recall = 0
rm_mkdir(result_savepath)
rm_mkdir(mask_savepath)
rm_mkdir(pre_savepath)
for i, (images, GT, HW, filename) in enumerate(self.test_loader):
images = images.to(self.device)
GT = GT.to(self.device)
SR = self.unet(images)
acc += get_accuracy(SR, GT, threshold)
SE += get_sensitivity(SR, GT, threshold)
SP += get_specificity(SR, GT, threshold)
PC += get_precision(SR, GT, threshold)
F1 += get_F1(SR, GT, threshold)
JS += get_JS(SR, GT, threshold)
DC += get_DC(SR, GT, threshold)
GT_class = torch.max(GT).int()
SR_class = torch.max(SR > threshold)
GT_class = GT_class.type_as(SR_class)
# recall positive
if SR_class > 0:
num_recall += 1
#print(GT_class, SR_class)
SR_PIL_img = saveImg(SR, HW)
GT_PIL_img = saveImg_GT(GT, HW)
images_PIL_img = saveImg_contour(images, HW)
#filename = self.test_loader.dataset.image_paths[i].split('/')[-1][:-4]
#print(filename[0])
SR_PIL_img.save(pre_savepath + filename[0] + ".png")
GT_PIL_img.save(mask_savepath + filename[0] + "_mask.png")
images_PIL_img.save(result_savepath + filename[0] + ".png")
length += images.size(0)
# images = images.cpu().numpy()
#new_img_PIL = torchvision.transforms.ToPILImage()(images[0,:,:,:]).convert('RGB')
# scipy.misc.imsave('outfile.jpg', images)
#SR_PIL_img = saveImg(SR, HW)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
unet_score = JS + DC
recall = num_recall / length
print('acc:{} DC:{} F1:{}'.format(acc, DC, F1))
print('length:{} num_recall:{} recall:{}'.format(
length, num_recall, recall))
def predict(self,
unet_path,
raw_savepath,
pre_savepath,
zeros_savepath,
threshold=0.5):
self.build_model()
self.unet.load_state_dict(torch.load(unet_path))
self.unet.train(False)
self.unet.eval()
num_recall = 0
length = 0
rm_mkdir(raw_savepath)
rm_mkdir(pre_savepath)
rm_mkdir(zeros_savepath)
zeors_image = np.zeros(shape=(512, 512, 3))
for i, (images, GT, HW, filename) in enumerate(self.test_loader):
images = images.to(self.device)
SR = self.unet(images)
SR_class = torch.max(SR > threshold)
if SR_class > 0:
num_recall += 1
images_PIL_img = saveImg_contour(images, HW)
SR_PIL_img = saveImg(SR, HW)
#filename = self.test_loader.dataset.image_paths[i].split('/')[-1][:-4]
images_PIL_img.save(raw_savepath + filename[0] + ".png")
SR_PIL_img.save(pre_savepath + filename[0] + ".png")
else:
scipy.misc.imsave(zeros_savepath + filename[0] + ".png",
zeors_image)
length += images.size(0)
#print(HW)
recall = num_recall / length
print('length:{} num_recall:{} recall:{}'.format(
length, num_recall, recall))
class Solver(object):
def __init__(self, config, train_valid_loader):
# Data loader
self.train_valid_loader = train_valid_loader
# Models
self.unet = None
self.optimizer = None
self.img_ch = config.img_ch
self.output_ch = config.output_ch
self.criterion = torch.nn.BCELoss()
self.augmentation_prob = config.augmentation_prob
# Hyper-parameters
self.lr = config.lr
self.beta1 = config.beta1
self.beta2 = config.beta2
# Training settings
self.n_splits = config.n_splits
self.num_epochs = config.num_epochs
self.num_epochs_decay = config.num_epochs_decay
self.batch_size = config.batch_size
# Step size
self.log_step = config.log_step
self.val_step = config.val_step
# Path
self.model_path = config.model_path
self.result_path = config.result_path
self.mode = config.mode
self.device = torch.device(
'cuda' if torch.cuda.is_available() else 'cpu')
self.model_type = config.model_type
self.t = config.t
self.build_model()
def build_model(self):
"""Build generator and discriminator."""
if self.model_type == 'U_Net':
self.unet = U_Net(img_ch=3, output_ch=self.output_ch)
elif self.model_type == 'R2U_Net':
self.unet = R2U_Net(img_ch=3, output_ch=self.output_ch, t=self.t)
elif self.model_type == 'AttU_Net':
self.unet = AttU_Net(img_ch=3, output_ch=self.output_ch)
elif self.model_type == 'R2AttU_Net':
self.unet = R2AttU_Net(img_ch=3,
output_ch=self.output_ch,
t=self.t)
self.optimizer = optim.Adam(list(self.unet.parameters()), self.lr,
[self.beta1, self.beta2])
self.unet.to(self.device)
# self.print_network(self.unet, self.model_type)
def print_network(self, model, name):
"""Print out the network information."""
num_params = 0
for p in model.parameters():
num_params += p.numel()
print(model)
print(name)
print("The number of parameters: {}".format(num_params))
def to_data(self, x):
"""Convert variable to tensor."""
if torch.cuda.is_available():
x = x.cpu()
return x.data
def update_lr(self, g_lr, d_lr):
for param_group in self.optimizer.param_groups:
param_group['lr'] = lr
def reset_grad(self):
"""Zero the gradient buffers."""
self.unet.zero_grad()
def reset_model(self):
for layer in self.unet.children():
if hasattr(layer, 'reset_parameters'):
layer.reset_parameters()
self.optimizer = optim.Adam(list(self.unet.parameters()), self.lr,
[self.beta1, self.beta2])
def compute_accuracy(self, SR, GT):
SR_flat = SR.view(-1)
GT_flat = GT.view(-1)
acc = GT_flat.data.cpu() == (SR_flat.data.cpu() > 0.5)
def tensor2img(self, x):
img = (x[:, 0, :, :] > x[:, 1, :, :]).float()
img = img * 255
return img
def train(self):
"""Train encoder, generator and discriminator."""
#====================================== Training ===========================================#
#===========================================================================================#
# U-Net Train
if False:
pass
#if os.path.isfile(unet_path):
# # Load the pretrained Encoder
# self.unet.load_state_dict(torch.load(unet_path))
# print('%s is Successfully Loaded from %s'%(self.model_type,unet_path))
else:
# Train for Encoder
kfold = KFold(n_splits=self.n_splits, shuffle=True)
for fold, (train_index, valid_index) in enumerate(
kfold.split(self.train_valid_loader.dataset)):
print(f"Fold{fold} start")
logging.info(f"Fold{fold} start")
logging.info(f"train: {train_index} valid: {valid_index}")
self.reset_model()
lr = self.lr
best_unet_score = 0.
self.unet.train(True)
epoch_loss = 0
for epoch in range(int(self.num_epochs / self.n_splits)):
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
# GT : Ground Truth
train_sampler = SubsetRandomSampler(train_index)
valid_sampler = SubsetRandomSampler(valid_index)
train_loader = torch.utils.data.DataLoader(
self.train_valid_loader.dataset,
batch_size=self.batch_size,
sampler=train_sampler)
valid_loader = torch.utils.data.DataLoader(
self.train_valid_loader.dataset,
batch_size=self.batch_size,
sampler=valid_sampler)
for i, (images, GT) in enumerate(train_loader):
images = images.to(self.device)
GT = GT.to(self.device)
# SR : Segmentation Result
SR = self.unet(images)
SR_probs = torch.sigmoid(SR)
SR_flat = SR_probs.view(SR_probs.size(0), -1)
GT_flat = GT.view(GT.size(0), -1)
loss = self.criterion(SR_flat, GT_flat)
epoch_loss += loss.item()
# Backprop + optimize
self.reset_grad()
loss.backward()
self.optimizer.step()
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC += get_DC(SR, GT)
length += images.size(0)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
print("training ", DC, length)
# Print the log info
print('Epoch [%d/%d], Loss: %.4f, \n[Training] Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f' % (
fold*self.num_epochs/self.n_splits+epoch+1, self.num_epochs, \
epoch_loss,\
acc,SE,SP,PC,F1,JS,DC))
logging.info('Epoch [%d/%d], Loss: %.4f, \n[Training] Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f' % (
fold*self.num_epochs/self.n_splits+epoch+1, self.num_epochs, \
epoch_loss,\
acc,SE,SP,PC,F1,JS,DC))
# Decay learning rate
if (epoch * self.n_splits + fold +
1) > (self.num_epochs - self.num_epochs_decay):
lr -= (self.lr / float(self.num_epochs_decay))
for param_group in self.optimizer.param_groups:
param_group['lr'] = lr
print('Decay learning rate to lr: {}.'.format(lr))
#===================================== Validation ====================================#
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
length = 0
for i, (images, GT) in enumerate(valid_loader):
images = images.to(self.device)
GT = GT.to(self.device)
SR = torch.sigmoid(self.unet(images))
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC += get_DC(SR, GT)
length += images.size(0)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
unet_score = JS + DC
print("valid ", DC, length)
print(
'[Validation] Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f'
% (acc, SE, SP, PC, F1, JS, DC))
logging.info(
'[Validation] Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f'
% (acc, SE, SP, PC, F1, JS, DC))
'''
torchvision.utils.save_image(images.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_image.png'%(self.model_type,epoch+1)))
torchvision.utils.save_image(SR.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_SR.png'%(self.model_type,epoch+1)))
torchvision.utils.save_image(GT.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_GT.png'%(self.model_type,epoch+1)))
'''
# Save Best U-Net model
print(f'model score: {unet_score} ({best_unet_score})')
logging.info(
(f'model score: {unet_score} ({best_unet_score})'))
if unet_score > best_unet_score:
best_unet_score = unet_score
best_epoch = fold * self.num_epochs / self.n_splits + epoch + 1
best_unet = self.unet.state_dict()
print('Best %s model score : %.4f' %
(self.model_type, best_unet_score))
logging.info('Best %s model score : %.4f' %
(self.model_type, best_unet_score))
unet_path = os.path.join(
self.model_path, '%s-f%d-%d-%.3f.pkl' %
(self.model_type, fold, best_epoch, DC))
torch.save(best_unet, unet_path)
#===================================== Test ====================================#
"""
class Solver(object):
def __init__(self, config, train_loader, valid_loader, test_loader,
whole_slice_prediction_loader):
# Data loader
self.train_loader = train_loader
self.valid_loader = valid_loader
self.test_loader = test_loader
self.whole_slice_prediction_loader = whole_slice_prediction_loader
# Models
self.unet = None
self.optimizer = None
self.img_ch = config.img_ch
self.output_ch = config.output_ch
#self.criterion = torch.nn.BCELoss()
self.augmentation_prob = config.augmentation_prob
self.inverse_ratio = config.inverse_ratio
# Hyper-parameters
self.initial_lr = config.lr
self.current_lr = config.lr
self.optimizer_choice = config.optimizer_choice
if config.optimizer_choice == 'Adam':
self.beta1 = config.beta1
self.beta2 = config.beta2
elif config.optimizer_choice == 'SGD':
self.momentum = config.momentum
else:
print('No such optimizer available')
# Training settings
self.num_epochs = config.num_epochs
#self.num_epochs_decay = config.num_epochs_decay
self.batch_size = config.batch_size
self.PPorLS = config.PPorLS
# Step size
self.log_step = config.log_step
self.val_step = config.val_step
self.batch_val_num = config.val_freq_batch
# Path
self.model_path = config.model_path
self.result_path = config.result_path
self.result_img_path = config.result_img_path
self.mode = config.mode
self.device = torch.device(
'cuda' if torch.cuda.is_available() else 'cpu')
self.model_type = config.model_type
self.t = config.t
self.build_model()
def build_model(self):
"""Build generator and discriminator."""
if self.model_type == 'U_Net':
self.unet = U_Net(img_ch=1, output_ch=1)
elif self.model_type == 'R2U_Net':
self.unet = R2U_Net(img_ch=1, output_ch=1, t=self.t)
elif self.model_type == 'AttU_Net':
self.unet = AttU_Net(img_ch=1, output_ch=1)
elif self.model_type == 'R2AttU_Net':
self.unet = R2AttU_Net(img_ch=1, output_ch=1, t=self.t)
if self.optimizer_choice == 'Adam':
self.optimizer = optim.Adam(list(self.unet.parameters()),
self.initial_lr,
[self.beta1, self.beta2])
elif self.optimizer_choice == 'SGD':
self.optimizer = optim.SGD(list(self.unet.parameters()),
self.initial_lr, self.momentum)
else:
pass
self.unet.to(self.device)
#self.print_network(self.unet, self.model_type)
def print_network(self, model, name):
"""Print out the network information."""
num_params = 0
for p in model.parameters():
num_params += p.numel()
print(model)
print(name)
print("The number of parameters: {}".format(num_params))
def dice_coeff_loss(self, y_pred, y_true):
smooth = 1
y_true_flat = y_true.view(y_true.size(0), -1)
y_pred_flat = y_pred.view(y_pred.size(0), -1)
intersection = (y_true_flat * y_pred_flat).sum()
return -(2. * intersection + smooth) / ((y_true_flat).sum() +
(y_pred_flat).sum() + smooth)
def RR_dice_coeff_loss(self, y_pred, y_true):
smooth = 1e-6
y_true_flat = y_true.view(y_true.size(0), -1)
y_pred_flat = y_pred.view(y_pred.size(0), -1)
intersection = (y_true_flat * y_pred_flat).sum()
inverse_y_true_flat = 1 - y_true_flat
inverse_y_pred_flat = 1 - y_pred_flat
inverse_intersection = (inverse_y_true_flat *
inverse_y_pred_flat).sum()
return -(2. * intersection + smooth) / (
(y_true_flat).sum() + (y_pred_flat).sum() +
smooth) - (2. * inverse_intersection + smooth) / (
(inverse_y_true_flat).sum() +
(inverse_y_pred_flat).sum() + smooth)
def to_data(self, x):
"""Convert variable to tensor."""
if torch.cuda.is_available():
x = x.cpu()
return x.data
# Redefine the 'update_lr' function (R&R)
def update_lr(self, new_lr):
for param_group in self.optimizer.param_groups:
param_group['lr'] = new_lr
def run_batch_validation(self, epoch, batch_train):
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
DC_RR = 0
length = 0
validation_batch_loss = 0
for batch, (images, GT) in enumerate(self.valid_loader):
images = images.to(self.device)
GT = GT.to(self.device)
# Reshape the images and GT to 4-dimensional so that they can get fed to the conv2d layer.
images = images.reshape(self.batch_size, self.img_ch,
np.shape(images)[1],
np.shape(images)[2])
GT = GT.reshape(self.batch_size, self.img_ch,
np.shape(GT)[1],
np.shape(GT)[2])
#SR = F.sigmoid(self.unet(images))
SR = torch.sigmoid(self.unet(images))
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC_RR += get_DC_RR(SR, GT, inverse_ratio=self.inverse_ratio)
DC += get_DC(SR, GT)
length += images.size(0)
# Compute the validation loss.
SR = self.unet(images)
SR_probs = torch.sigmoid(SR)
SR_flat = SR_probs.view(SR_probs.size(0), -1)
GT_flat = GT.view(GT.size(0), -1)
# use the dice coefficient loss instead of the BCE loss. (R&R)
validation_loss = self.dice_coeff_loss(SR_flat, GT_flat)
validation_batch_loss += validation_loss.item()
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
DC_RR = DC_RR / length
unet_score = DC_RR
print('current batch: {}'.format(batch_train))
print('Current learning rate: {}'.format(self.current_lr))
print(
'Current Batch [%d] \n[Validation] Validation Loss: %.4f, Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f, DC_RR: %.4f'
% (batch_train + 1, validation_batch_loss, acc, SE, SP, PC, F1, JS,
DC, DC_RR))
# Append validation loss to train loss history (R&R)
f = open(os.path.join(self.result_path,
'model_validation_batch_history.csv'),
'a',
encoding='utf-8',
newline='')
wr = csv.writer(f)
wr.writerow([
'Validation',
'Epoch [%d/%d]' % (epoch + 1, self.num_epochs),
'Batch [%d]' % (batch_train + 1),
'Validation loss: %.4f' % validation_batch_loss,
'Accuracy: %.4f' % acc,
'Sensitivity: %.4f' % SE,
'Specificity: %.4f' % SP,
'Precision: %.4f' % PC,
'F1 Score: %.4f' % F1,
'Jaccard Similarity: %.4f' % JS,
'Dice Coefficient: %.4f' % DC,
'RR_DC: %.4f' % DC_RR
])
self.unet.train(True)
return (validation_batch_loss, unet_score)
# Define adaptive learning rate handler (R&R)
def adaptive_lr_handler(self, cooldown, min_lr, current_epoch,
previous_update_epoch, plateau_ratio,
adjustment_ratio, loss_history):
if current_epoch > 1:
if current_epoch - previous_update_epoch > cooldown:
if (loss_history[-1] > loss_history[-2]) or (abs(
(loss_history[-2] - loss_history[-1]) / loss_history[-2]) <
plateau_ratio):
if self.current_lr > min_lr:
self.current_lr = adjustment_ratio * self.current_lr
self.update_lr(self.current_lr)
print(
'Validation loss stop decreasing. Adjust the learning rate to {}.'
.format(self.current_lr))
return current_epoch
def reset_grad(self):
"""Zero the gradient buffers."""
self.unet.zero_grad()
def tensor2img(self, x):
img = (x[:, 0, :, :] > x[:, 1, :, :]).float()
img = img * 255
return img
def train(self):
"""Train encoder, generator and discriminator."""
#====================================== Training ===========================================#
#===========================================================================================#
unet_path = os.path.join(
self.model_path, '%s-%d-%.4f-%.4f-%s-%s-%.4f.pkl' %
(self.model_type, self.num_epochs, self.initial_lr,
self.augmentation_prob, self.PPorLS, self.optimizer_choice,
self.inverse_ratio))
print('The U-Net path is {}'.format(unet_path))
# U-Net Train
# Train loss history (R&R)
train_loss_history = []
train_batch_loss_history = []
# Validation loss history (R&R)
validation_loss_history = []
val_batch_loss_history = []
stop_training = False
if os.path.isfile(unet_path):
# Load the pretrained Encoder
self.unet.load_state_dict(torch.load(unet_path))
print('%s is Successfully Loaded from %s' %
(self.model_type, unet_path))
else:
# Train for Encoder
best_unet_score = 0.
print('Start training. The initial learning rate is: {}'.format(
self.initial_lr))
for epoch in range(self.num_epochs):
self.unet.train(True)
train_epoch_loss = 0
validation_epoch_loss = 0
if stop_training == True:
break
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
DC_RR = 0
length = 0
for batch, (images, GT) in enumerate(self.train_loader):
# GT : Ground Truth
images = images.to(self.device)
GT = GT.to(self.device)
# Reshape the images and GT to 4-dimensional so that they can get fed to the conv2d layer. (R&R)
images = images.reshape(self.batch_size, self.img_ch,
np.shape(images)[1],
np.shape(images)[2])
GT = GT.reshape(self.batch_size, self.img_ch,
np.shape(GT)[1],
np.shape(GT)[2])
# SR : Segmentation Result
SR = self.unet(images)
SR_probs = torch.sigmoid(SR)
SR_flat = SR_probs.view(SR_probs.size(0), -1)
GT_flat = GT.view(GT.size(0), -1)
# Use dice coefficient loss instead of the BCE loss. (R&R)
train_loss = self.dice_coeff_loss(SR_flat, GT_flat)
train_epoch_loss += train_loss.item()
# Backprop + optimize
self.reset_grad()
train_loss.backward()
self.optimizer.step()
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC_RR += get_DC_RR(SR,
GT,
inverse_ratio=self.inverse_ratio)
DC += get_DC(SR, GT)
length += images.size(0)
if epoch == 0:
val_frequency = self.batch_val_num[0]
else:
val_frequency = self.batch_val_num[1]
if batch % val_frequency == 0:
# update learning rate and record the validation loss history
validation_batch_loss, unet_score = self.run_batch_validation(
epoch, batch)
val_batch_loss_history.append(validation_batch_loss)
train_batch_loss_history.append(train_epoch_loss)
if unet_score > best_unet_score:
best_unet_score = unet_score
best_epoch = epoch
best_unet = self.unet.state_dict()
print('Best %s model score : %.4f' %
(self.model_type, best_unet_score))
torch.save(best_unet, unet_path)
# update learning rate
batch_id = len(val_batch_loss_history)
try:
previous_batch_id = self.adaptive_lr_handler(
3, 0.01 * self.initial_lr, batch_id,
previous_batch_id, 0.001, 0.5,
val_batch_loss_history)
except:
previous_batch_id = self.adaptive_lr_handler(
3, 0.01 * self.initial_lr, batch_id, 0, 0.001,
0.5, val_batch_loss_history)
if ((batch_id - 4) % 10 == 0) and (
batch_id >
8) or unet_score < 0.2 * best_unet_score:
if (np.median(val_batch_loss_history[-10:-5]) >=
np.median(val_batch_loss_history[-5:])):
print(
'Validation loss stop decreasing. Stop training.'
)
stop_training = True
break
if stop_training == True:
break
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
DC_RR = DC_RR / length
# Print the log info
print('Epoch [%d/%d] \n[Training] Train Loss: %.4f, Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f, DC_RR: %.4f' % (\
epoch + 1, self.num_epochs, train_epoch_loss,\
acc, SE, SP, PC, F1, JS, DC, DC_RR))
# Append train loss to train loss history (R&R)
train_loss_history.append(train_epoch_loss)
f = open(os.path.join(self.result_path, 'train_and_validation_history.csv'), 'a', \
encoding = 'utf-8', newline= '')
wr = csv.writer(f)
wr.writerow(['Training', 'Epoch [%d/%d]' % (epoch + 1, self.num_epochs), \
'Train loss: %.4f' % train_epoch_loss,\
'Accuracy: %.4f' % acc, 'Sensitivity: %.4f' % SE, 'Specificity: %.4f' % SP, 'Precision: %.4f'% PC, \
'F1 Score: %.4f' % F1, 'Jaccard Similarity: %.4f' % JS, 'Dice Coefficient: %.4f' % DC, 'RR_DC: %.4f' % DC_RR])
f.close()
#===================================== Validation ====================================#
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
DC_RR = 0
length = 0
for batch, (images, GT) in enumerate(self.valid_loader):
images = images.to(self.device)
GT = GT.to(self.device)
# Reshape the images and GT to 4-dimensional so that they can get fed to the conv2d layer.
images = images.reshape(self.batch_size, self.img_ch,
np.shape(images)[1],
np.shape(images)[2])
GT = GT.reshape(self.batch_size, self.img_ch,
np.shape(GT)[1],
np.shape(GT)[2])
#SR = F.sigmoid(self.unet(images))
SR = torch.sigmoid(self.unet(images))
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC_RR += get_DC_RR(SR,
GT,
inverse_ratio=self.inverse_ratio)
DC += get_DC(SR, GT)
length += images.size(0)
# Compute the validation loss.
SR = self.unet(images)
SR_probs = torch.sigmoid(SR)
SR_flat = SR_probs.view(SR_probs.size(0), -1)
GT_flat = GT.view(GT.size(0), -1)
# use the dice coefficient loss instead of the BCE loss. (R&R)
validation_loss = self.dice_coeff_loss(SR_flat, GT_flat)
validation_epoch_loss += validation_loss.item()
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
DC_RR = DC_RR / length
unet_score = DC_RR
print('Current learning rate: {}'.format(self.current_lr))
print(
'Epoch [%d/%d] \n[Validation] Validation Loss: %.4f, Acc: %.4f, SE: %.4f, SP: %.4f, PC: %.4f, F1: %.4f, JS: %.4f, DC: %.4f, DC_RR: %.4f'
% (epoch + 1, self.num_epochs, validation_epoch_loss, acc,
SE, SP, PC, F1, JS, DC, DC_RR))
# Append validation loss to train loss history (R&R)
validation_loss_history.append(validation_epoch_loss)
'''
torchvision.utils.save_image(images.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_image.png'%(self.model_type,epoch+1)))
torchvision.utils.save_image(SR.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_SR.png'%(self.model_type,epoch+1)))
torchvision.utils.save_image(GT.data.cpu(),
os.path.join(self.result_path,
'%s_valid_%d_GT.png'%(self.model_type,epoch+1)))
'''
f = open(os.path.join(self.result_path, 'train_and_validation_history.csv'), 'a', \
encoding = 'utf-8', newline= '')
wr = csv.writer(f)
wr.writerow(['Validation', 'Epoch [%d/%d]' % (epoch + 1, self.num_epochs), \
'Validation loss: %.4f' % validation_epoch_loss,\
'Accuracy: %.4f' % acc, 'Sensitivity: %.4f' % SE, 'Specificity: %.4f' % SP, 'Precision: %.4f'% PC, \
'F1 Score: %.4f' % F1, 'Jaccard Similarity: %.4f' % JS, 'Dice Coefficient: %.4f' % DC, 'RR_DC: %.4f' % DC_RR])
f.close()
# Save Best U-Net model
if unet_score > best_unet_score:
best_unet_score = unet_score
best_epoch = epoch
best_unet = self.unet.state_dict()
print('Best %s model score : %.4f' %
(self.model_type, best_unet_score))
torch.save(best_unet, unet_path)
# Early stop (R&R)
#if (epoch > 8) and ((epoch - 4) % 5 == 0):
# if (np.median(validation_loss_history[-10:-5]) >= np.median(validation_loss_history[-5:])):
# print('Validation loss stop decreasing. Stop training.')
# break
if (len(validation_loss_history) > 1):
if (validation_loss_history[-2] >=
validation_loss_history[-1]):
print(
'Validation loss stop decreasing. Stop training.')
break
del self.unet
try:
del best_unet
except:
print(
'Cannot delete the variable "best_unet": variable does not exist.'
)
return train_loss_history, validation_loss_history, val_batch_loss_history, train_batch_loss_history
def test(self):
"""Test encoder, generator and discriminator."""
#======================================= Test ====================================#
#=================================================================================#
unet_path = os.path.join(
self.model_path, '%s-%d-%.4f-%.4f-%s-%s-%.4f.pkl' %
(self.model_type, self.num_epochs, self.initial_lr,
self.augmentation_prob, self.PPorLS, self.optimizer_choice,
self.inverse_ratio))
self.build_model()
self.unet.load_state_dict(torch.load(unet_path))
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
DC_RR = 0
length = 0
for i, (images, GT) in enumerate(self.test_loader):
images = images.to(self.device)
GT = GT.to(self.device)
# Reshape the images and GT to 4-dimensional so that they can get fed to the conv2d layer.
images = images.reshape(self.batch_size, self.img_ch,
np.shape(images)[1],
np.shape(images)[2])
GT = GT.reshape(self.batch_size, self.img_ch,
np.shape(GT)[1],
np.shape(GT)[2])
#SR = F.sigmoid(self.unet(images))
SR = torch.sigmoid(self.unet(images))
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC_RR += get_DC_RR(SR, GT, inverse_ratio=self.inverse_ratio)
DC += get_DC(SR, GT)
length += images.size(0)
np_img = np.squeeze(SR.cpu().detach().numpy())
np.save(self.result_img_path + str(i) + '.npy', np_img)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
DC_RR = DC_RR / length
print('model type: ', self.model_type, 'accuracy: ', acc,
'sensitivity: ', SE, 'specificity: ', SP, 'precision: ', PC,
'F1 score: ', F1, 'Jaccard similarity: ', JS,
'Dice Coefficient: ', DC, 'DC_RR: ', DC_RR)
result_csv_path = '/home/raphael/Projects/DL-Lung_Nodule_LUNA16/Solutions/RaphaelRosalie-solution/patch-based_U-net/results/'
f = open(os.path.join(result_csv_path, 'result_compare.csv'),
'a',
encoding='utf-8',
newline='')
wr = csv.writer(f)
wr.writerow([self.model_type, self.PPorLS, 'Accuracy: %.4f' % acc, 'Sensitivity: %.4f' % SE, 'Specificity: %.4f' % SP, 'Precision: %.4f'% PC, \
'F1 Score: %.4f' % F1, 'Jaccard Similarity: %.4f' % JS, 'Dice Coefficient: %.4f' % DC, 'RR_DC: %.4f' % DC_RR, 'inverse_ratio: %.3f' % self.inverse_ratio])
f.close()
def whole_slice_prediction(self):
"""Inference mode. Return whole slice prediction as a binary nodule mask."""
unet_path = os.path.join(
self.model_path, '%s-%d-%.4f-%.4f-%s-%s.pkl' %
(self.model_type, self.num_epochs, self.initial_lr,
self.augmentation_prob, self.PPorLS, self.optimizer_choice))
self.build_model()
self.unet.load_state_dict(torch.load(unet_path))
self.unet.train(False)
self.unet.eval()
acc = 0. # Accuracy
SE = 0. # Sensitivity (Recall)
SP = 0. # Specificity
PC = 0. # Precision
F1 = 0. # F1 Score
JS = 0. # Jaccard Similarity
DC = 0. # Dice Coefficient
DC_RR = 0
length = 0
for batch, (images,
GT) in enumerate(self.whole_slice_prediction_loader):
images = images.to(self.device)
GT = GT.to(self.device)
# Reshape the images and GT to 4-dimensional so that they can get fed to the conv2d layer.
images = images.reshape(self.batch_size, self.img_ch,
np.shape(images)[1],
np.shape(images)[2])
GT = GT.reshape(self.batch_size, self.img_ch,
np.shape(GT)[1],
np.shape(GT)[2])
#SR = F.sigmoid(self.unet(images))
SR = torch.sigmoid(self.unet(images))
acc += get_accuracy(SR, GT)
SE += get_sensitivity(SR, GT)
SP += get_specificity(SR, GT)
PC += get_precision(SR, GT)
F1 += get_F1(SR, GT)
JS += get_JS(SR, GT)
DC_RR += get_DC_RR(SR, GT)
DC += get_DC(SR, GT)
length += images.size(0)
np_img = np.squeeze(SR.cpu().detach().numpy())
np.save(self.result_img_path + str(i) + '.npy', np_img)
acc = acc / length
SE = SE / length
SP = SP / length
PC = PC / length
F1 = F1 / length
JS = JS / length
DC = DC / length
DC_RR = DC_RR / length
unet_score = DC