def train_net(args):
torch.manual_seed(7)
np.random.seed(7)
checkpoint = args.checkpoint
start_epoch = 0
best_acc = float('-inf')
writer = SummaryWriter()
epochs_since_improvement = 0
# Initialize / load checkpoint
if checkpoint is None:
if args.network == 'r18':
model = resnet18(args)
elif args.network == 'r34':
model = resnet34(args)
elif args.network == 'r50':
model = resnet50(args)
elif args.network == 'r101':
model = resnet101(args)
elif args.network == 'r152':
model = resnet152(args)
elif args.network == 'mobile':
model = MobileNetV2()
else:
raise TypeError('network {} is not supported.'.format(
args.network))
# print(model)
model = nn.DataParallel(model)
metric_fc = ArcMarginModel(args)
metric_fc = nn.DataParallel(metric_fc)
if args.optimizer == 'sgd':
optimizer = torch.optim.SGD([{
'params': model.parameters()
}, {
'params': metric_fc.parameters()
}],
lr=args.lr,
momentum=args.mom,
weight_decay=args.weight_decay)
else:
optimizer = torch.optim.Adam([{
'params': model.parameters()
}, {
'params': metric_fc.parameters()
}],
lr=args.lr,
weight_decay=args.weight_decay)
else:
checkpoint = torch.load(checkpoint)
start_epoch = checkpoint['epoch'] + 1
epochs_since_improvement = checkpoint['epochs_since_improvement']
model = checkpoint['model']
metric_fc = checkpoint['metric_fc']
optimizer = checkpoint['optimizer']
logger = get_logger()
# Move to GPU, if available
model = model.to(device)
metric_fc = metric_fc.to(device)
# Loss function
if args.focal_loss:
criterion = FocalLoss(gamma=args.gamma).to(device)
else:
criterion = nn.CrossEntropyLoss().to(device)
# Custom dataloaders
train_dataset = ArcFaceDataset('train')
train_loader = torch.utils.data.DataLoader(train_dataset,
batch_size=args.batch_size,
shuffle=True,
num_workers=4)
scheduler = StepLR(optimizer, step_size=args.lr_step, gamma=0.1)
# Epochs
for epoch in range(start_epoch, args.end_epoch):
# One epoch's training
train_loss, train_acc = train(train_loader=train_loader,
model=model,
metric_fc=metric_fc,
criterion=criterion,
optimizer=optimizer,
epoch=epoch,
logger=logger)
writer.add_scalar('model/train_loss', train_loss, epoch)
writer.add_scalar('model/train_acc', train_acc, epoch)
# One epoch's validation
lfw_acc, threshold = lfw_test(model)
writer.add_scalar('model/valid_acc', lfw_acc, epoch)
writer.add_scalar('model/valid_thres', threshold, epoch)
# Check if there was an improvement
is_best = lfw_acc > best_acc
best_acc = max(lfw_acc, best_acc)
if not is_best:
epochs_since_improvement += 1
print("\nEpochs since last improvement: %d\n" %
(epochs_since_improvement, ))
else:
epochs_since_improvement = 0
# Save checkpoint
save_checkpoint(epoch, epochs_since_improvement, model, metric_fc,
optimizer, best_acc, is_best)
scheduler.step(epoch)
def train_net(args):
torch.manual_seed(7)
np.random.seed(7)
checkpoint = args.checkpoint
start_epoch = 0
best_acc = float('-inf')
writer = SummaryWriter()
epochs_since_improvement = 0
# Initialize / load checkpoint
if checkpoint is None:
if args.network == 'r18':
model = resnet18(args)
elif args.network == 'r34':
model = resnet34(args)
elif args.network == 'r50':
model = resnet50(args)
elif args.network == 'r101':
model = resnet101(args)
elif args.network == 'r152':
model = resnet152(args)
elif args.network == 'mobile':
from mobilenet_v2 import MobileNetV2
model = MobileNetV2()
else:
raise TypeError('network {} is not supported.'.format(
args.network))
metric_fc = ArcMarginModel(args)
if args.optimizer == 'sgd':
optimizer = torch.optim.SGD([{
'params': model.parameters()
}, {
'params': metric_fc.parameters()
}],
lr=args.lr,
momentum=args.mom,
weight_decay=args.weight_decay)
else:
optimizer = torch.optim.Adam([{
'params': model.parameters()
}, {
'params': metric_fc.parameters()
}],
lr=args.lr,
weight_decay=args.weight_decay)
else:
checkpoint = torch.load(checkpoint)
start_epoch = checkpoint['epoch'] + 1
epochs_since_improvement = checkpoint['epochs_since_improvement']
model = checkpoint['model']
metric_fc = checkpoint['metric_fc']
optimizer = checkpoint['optimizer']
model = nn.DataParallel(model)
metric_fc = nn.DataParallel(metric_fc)
# Move to GPU, if available
model = model.to(device)
metric_fc = metric_fc.to(device)
# Loss function
if args.focal_loss:
criterion = FocalLoss(gamma=args.gamma).to(device)
else:
criterion = nn.CrossEntropyLoss().to(device)
# Custom dataloaders
train_dataset = ArcFaceDataset('train')
train_loader = torch.utils.data.DataLoader(train_dataset,
batch_size=args.batch_size,
shuffle=True,
num_workers=num_workers)
# Epochs
for epoch in range(start_epoch, args.end_epoch):
# Decay learning rate if there is no improvement for 2 consecutive epochs, and terminate training after 10
if epochs_since_improvement == 10:
break
if epochs_since_improvement > 0 and epochs_since_improvement % 2 == 0:
checkpoint = 'BEST_checkpoint.tar'
checkpoint = torch.load(checkpoint)
model = checkpoint['model']
metric_fc = checkpoint['metric_fc']
optimizer = checkpoint['optimizer']
adjust_learning_rate(optimizer, 0.5)
# One epoch's training
train_loss, train_top1_accs = train(train_loader=train_loader,
model=model,
metric_fc=metric_fc,
criterion=criterion,
optimizer=optimizer,
epoch=epoch)
lr = optimizer.param_groups[0]['lr']
print('\nCurrent effective learning rate: {}\n'.format(lr))
# print('Step num: {}\n'.format(optimizer.step_num))
writer.add_scalar('model/train_loss', train_loss, epoch)
writer.add_scalar('model/train_accuracy', train_top1_accs, epoch)
writer.add_scalar('model/learning_rate', lr, epoch)
if epoch % 5 == 0:
# One epoch's validation
megaface_acc = megaface_test(model)
writer.add_scalar('model/megaface_accuracy', megaface_acc, epoch)
# Check if there was an improvement
is_best = megaface_acc > best_acc
best_acc = max(megaface_acc, best_acc)
if not is_best:
epochs_since_improvement += 1
print("\nEpochs since last improvement: %d\n" %
(epochs_since_improvement, ))
else:
epochs_since_improvement = 0
# Save checkpoint
save_checkpoint(epoch, epochs_since_improvement, model, metric_fc,
optimizer, best_acc, is_best)
def train_net(args):
torch.manual_seed(7)
np.random.seed(7)
checkpoint = args.checkpoint
start_epoch = 0
best_acc = 0
writer = SummaryWriter()
epochs_since_improvement = 0
# Initialize / load checkpoint
if checkpoint is None:
if args.network == 'r18':
model = resnet18(args)
elif args.network == 'r34':
model = resnet34(args)
elif args.network == 'r50':
model = resnet50(args)
elif args.network == 'r101':
model = resnet101(args)
elif args.network == 'r152':
model = resnet152(args)
elif args.network == 'mobile':
model = MobileNet(1.0)
elif args.network == 'mr18':
print("mr18")
model = myResnet18()
else:
model = resnet_face18(args.use_se)
model = nn.DataParallel(model)
metric_fc = ArcMarginModel(args)
metric_fc = nn.DataParallel(metric_fc)
if args.optimizer == 'sgd':
optimizer = torch.optim.SGD([{
'params': model.parameters()
}, {
'params': metric_fc.parameters()
}],
lr=args.lr,
momentum=args.mom,
weight_decay=args.weight_decay)
else:
optimizer = torch.optim.Adam([{
'params': model.parameters()
}, {
'params': metric_fc.parameters()
}],
lr=args.lr,
weight_decay=args.weight_decay)
else:
checkpoint = torch.load(checkpoint)
start_epoch = checkpoint['epoch'] + 1
epochs_since_improvement = checkpoint['epochs_since_improvement']
model = checkpoint['model']
metric_fc = checkpoint['metric_fc']
optimizer = checkpoint['optimizer']
logger = get_logger()
# Move to GPU, if available
model = model.to(device)
metric_fc = metric_fc.to(device)
# Loss function
if args.focal_loss:
criterion = FocalLoss(gamma=args.gamma).to(device)
else:
criterion = nn.CrossEntropyLoss().to(device)
# Custom dataloaders
train_dataset = ArcFaceDataset('train')
train_loader = torch.utils.data.DataLoader(train_dataset,
batch_size=args.batch_size,
shuffle=True)
scheduler = StepLR(optimizer, step_size=args.lr_step, gamma=0.1)
# Epochs
for epoch in range(start_epoch, args.end_epoch):
scheduler.step()
if args.full_log:
lfw_acc, threshold = lfw_test(model)
writer.add_scalar('LFW_Accuracy', lfw_acc, epoch)
full_log(epoch)
start = datetime.now()
# One epoch's training
train_loss, train_top5_accs = train(train_loader=train_loader,
model=model,
metric_fc=metric_fc,
criterion=criterion,
optimizer=optimizer,
epoch=epoch,
logger=logger,
writer=writer)
writer.add_scalar('Train_Loss', train_loss, epoch)
writer.add_scalar('Train_Top5_Accuracy', train_top5_accs, epoch)
end = datetime.now()
delta = end - start
print('{} seconds'.format(delta.seconds))
# One epoch's validation
lfw_acc, threshold = lfw_test(model)
writer.add_scalar('LFW Accuracy', lfw_acc, epoch)
# Check if there was an improvement
is_best = lfw_acc > best_acc
best_acc = max(lfw_acc, best_acc)
if not is_best:
epochs_since_improvement += 1
print("\nEpochs since last improvement: %d\n" %
(epochs_since_improvement, ))
else:
epochs_since_improvement = 0
# Save checkpoint
save_checkpoint(epoch, epochs_since_improvement, model, metric_fc,
optimizer, best_acc, is_best)
def train_net(args):
torch.manual_seed(7)
np.random.seed(7)
checkpoint = args.checkpoint
start_epoch = 0
best_acc = 0
writer = SummaryWriter()
epochs_since_improvement = 0
# Initialize / load checkpoint
if checkpoint is None:
if args.network == 'r18':
model = resnet18(args)
elif args.network == 'r34':
model = resnet34(args)
elif args.network == 'r50':
model = resnet50(args)
elif args.network == 'r101':
model = resnet101(args)
elif args.network == 'r152':
model = resnet152(args)
elif args.network == 'mobile':
model = MobileNet(1.0)
else:
model = resnet_face18(args.use_se)
model = nn.DataParallel(model)
metric_fc = ArcMarginModel(args)
metric_fc = nn.DataParallel(metric_fc)
if args.optimizer == 'sgd':
# optimizer = torch.optim.SGD([{'params': model.parameters()}, {'params': metric_fc.parameters()}],
# lr=args.lr, momentum=args.mom, weight_decay=args.weight_decay)
optimizer = InsightFaceOptimizer(
torch.optim.SGD([{
'params': model.parameters()
}, {
'params': metric_fc.parameters()
}],
lr=args.lr,
momentum=args.mom,
weight_decay=args.weight_decay))
else:
optimizer = torch.optim.Adam([{
'params': model.parameters()
}, {
'params': metric_fc.parameters()
}],
lr=args.lr,
weight_decay=args.weight_decay)
else:
checkpoint = torch.load(checkpoint)
start_epoch = checkpoint['epoch'] + 1
epochs_since_improvement = checkpoint['epochs_since_improvement']
model = checkpoint['model']
metric_fc = checkpoint['metric_fc']
optimizer = checkpoint['optimizer']
logger = get_logger()
# Move to GPU, if available
model = model.to(device)
metric_fc = metric_fc.to(device)
# Loss function
if args.focal_loss:
criterion = FocalLoss(gamma=args.gamma).to(device)
else:
criterion = nn.CrossEntropyLoss().to(device)
# Custom dataloaders
train_dataset = ArcFaceDataset('train')
train_loader = torch.utils.data.DataLoader(train_dataset,
batch_size=args.batch_size,
shuffle=True,
num_workers=8)
# Epochs
for epoch in range(start_epoch, args.end_epoch):
# One epoch's training
train_loss, train_top1_accs = train(train_loader=train_loader,
model=model,
metric_fc=metric_fc,
criterion=criterion,
optimizer=optimizer,
epoch=epoch,
logger=logger)
print('\nCurrent effective learning rate: {}\n'.format(optimizer.lr))
print('Step num: {}\n'.format(optimizer.step_num))
writer.add_scalar('model/train_loss', train_loss, epoch)
writer.add_scalar('model/train_accuracy', train_top1_accs, epoch)
writer.add_scalar('model/learning_rate', optimizer.lr, epoch)
# One epoch's validation
megaface_acc = megaface_test(model)
writer.add_scalar('model/megaface_accuracy', megaface_acc, epoch)
# Check if there was an improvement
is_best = megaface_acc > best_acc
best_acc = max(megaface_acc, best_acc)
if not is_best:
epochs_since_improvement += 1
print("\nEpochs since last improvement: %d\n" %
(epochs_since_improvement, ))
else:
epochs_since_improvement = 0
# Save checkpoint
save_checkpoint(epoch, epochs_since_improvement, model, metric_fc,
optimizer, best_acc, is_best)
def train_net(args):
torch.manual_seed(7)
np.random.seed(7)
checkpoint = args.checkpoint
start_epoch = 0
best_acc = float('-inf')
writer = SummaryWriter()
epochs_since_improvement = 0
# Initialize / load checkpoint
if checkpoint is None:
model = MobileFaceNet()
metric_fc = ArcMarginModel(args)
optimizer = torch.optim.SGD([{
'params': model.conv1.parameters()
}, {
'params': model.dw_conv.parameters()
}, {
'params': model.features.parameters()
}, {
'params': model.conv2.parameters()
}, {
'params': model.gdconv.parameters()
}, {
'params': model.conv3.parameters(),
'weight_decay': 4e-4
}, {
'params': model.bn.parameters()
}, {
'params': metric_fc.parameters()
}],
lr=args.lr,
momentum=args.mom,
weight_decay=args.weight_decay,
nesterov=True)
model = nn.DataParallel(model)
metric_fc = nn.DataParallel(metric_fc)
else:
checkpoint = torch.load(checkpoint)
start_epoch = checkpoint['epoch'] + 1
epochs_since_improvement = checkpoint['epochs_since_improvement']
model = checkpoint['model']
metric_fc = checkpoint['metric_fc']
optimizer = checkpoint['optimizer']
logger = get_logger()
# Move to GPU, if available
model = model.to(device)
metric_fc = metric_fc.to(device)
# Loss function
if args.focal_loss:
criterion = FocalLoss(gamma=args.gamma).to(device)
else:
criterion = nn.CrossEntropyLoss().to(device)
# Custom dataloaders
train_dataset = ArcFaceDataset('train')
train_loader = torch.utils.data.DataLoader(train_dataset,
batch_size=args.batch_size,
shuffle=True,
num_workers=4)
scheduler = MultiStepLR(optimizer, milestones=[5, 10, 15, 20], gamma=0.1)
# Epochs
for epoch in range(start_epoch, args.end_epoch):
# One epoch's training
train_loss, train_acc = train(train_loader=train_loader,
model=model,
metric_fc=metric_fc,
criterion=criterion,
optimizer=optimizer,
epoch=epoch,
logger=logger)
lr = optimizer.param_groups[0]['lr']
print('\nLearning rate={}\n'.format(lr))
writer.add_scalar('model/train_loss', train_loss, epoch)
writer.add_scalar('model/train_acc', train_acc, epoch)
writer.add_scalar('model/learning_rate', lr, epoch)
# One epoch's validation
lfw_acc, threshold = lfw_test(model)
writer.add_scalar('model/lfw_acc', lfw_acc, epoch)
writer.add_scalar('model/threshold', threshold, epoch)
# Check if there was an improvement
is_best = lfw_acc > best_acc
best_acc = max(lfw_acc, best_acc)
if not is_best:
epochs_since_improvement += 1
print("\nEpochs since last improvement: %d\n" %
(epochs_since_improvement, ))
else:
epochs_since_improvement = 0
# Save checkpoint
save_checkpoint(epoch, epochs_since_improvement, model, metric_fc,
optimizer, best_acc, is_best)
scheduler.step(epoch)
def train_net(args):
torch.manual_seed(7)
np.random.seed(7)
checkpoint = args.checkpoint
start_epoch = 0
best_acc = float('-inf')
writer = SummaryWriter()
epochs_since_improvement = 0
# Initialize / load checkpoint
if checkpoint is None:
if args.network == 'r18':
model = resnet18(args)
elif args.network == 'r34':
model = resnet34(args)
elif args.network == 'r50':
model = resnet50(args)
elif args.network == 'r101':
model = resnet101(args)
elif args.network == 'r152':
model = resnet152(args)
else:
raise TypeError('network {} is not supported.'.format(
args.network))
if args.pretrained:
model.load_state_dict(torch.load('insight-face-v3.pt'))
model = nn.DataParallel(model)
metric_fc = ArcMarginModel(args)
metric_fc = nn.DataParallel(metric_fc)
if args.optimizer == 'sgd':
optimizer = torch.optim.SGD([{
'params': model.parameters()
}, {
'params': metric_fc.parameters()
}],
lr=args.lr,
momentum=args.mom,
nesterov=True,
weight_decay=args.weight_decay)
else:
optimizer = torch.optim.Adam([{
'params': model.parameters()
}, {
'params': metric_fc.parameters()
}],
lr=args.lr,
weight_decay=args.weight_decay)
else:
checkpoint = torch.load(checkpoint)
start_epoch = checkpoint['epoch'] + 1
epochs_since_improvement = checkpoint['epochs_since_improvement']
model = checkpoint['model']
metric_fc = checkpoint['metric_fc']
optimizer = checkpoint['optimizer']
# Move to GPU, if available
model = model.to(device)
metric_fc = metric_fc.to(device)
# Loss function
if args.focal_loss:
criterion = FocalLoss(gamma=args.gamma)
else:
criterion = nn.CrossEntropyLoss()
# Custom dataloaders
train_dataset = ArcFaceDataset('train')
train_loader = torch.utils.data.DataLoader(train_dataset,
batch_size=args.batch_size,
shuffle=True,
num_workers=num_workers)
scheduler = MultiStepLR(optimizer, milestones=[8, 16, 24, 32], gamma=0.1)
# Epochs
for epoch in range(start_epoch, args.end_epoch):
lr = optimizer.param_groups[0]['lr']
logger.info('\nCurrent effective learning rate: {}\n'.format(lr))
# print('Step num: {}\n'.format(optimizer.step_num))
writer.add_scalar('model/learning_rate', lr, epoch)
# One epoch's training
train_loss, train_top1_accs = train(train_loader=train_loader,
model=model,
metric_fc=metric_fc,
criterion=criterion,
optimizer=optimizer,
epoch=epoch)
writer.add_scalar('model/train_loss', train_loss, epoch)
writer.add_scalar('model/train_accuracy', train_top1_accs, epoch)
# One epoch's validation
megaface_acc = megaface_test(model)
writer.add_scalar('model/megaface_accuracy', megaface_acc, epoch)
scheduler.step(epoch)
# Check if there was an improvement
is_best = megaface_acc > best_acc
best_acc = max(megaface_acc, best_acc)
if not is_best:
epochs_since_improvement += 1
logger.info("\nEpochs since last improvement: %d\n" %
(epochs_since_improvement, ))
else:
epochs_since_improvement = 0
# Save checkpoint
save_checkpoint(epoch, epochs_since_improvement, model, metric_fc,
optimizer, best_acc, is_best, scheduler)
def train_net(args):
torch.manual_seed(7)
np.random.seed(7)
checkpoint = args.checkpoint
start_epoch = 0
best_acc = float('-inf')
import socket
exp_name = datetime.now().strftime('%Y%m%d_%H%M%S')
writer = SummaryWriter(
os.path.join('runs_mobileNet', exp_name + '_' + socket.gethostname()))
epochs_since_improvement = 0
# Initialize / load checkpoint
if checkpoint is None:
# model = MobileFaceNet()
# metric_fc = ArcMarginModel(args)
model = MobileFaceNet_PRELU()
# model = MobileFaceNet_PRELU_AirFace()
# metric_fc = ArcMarginProduct()
metric_fc = MV_Softmax()
# For mobilenet RELU
# optimizer = torch.optim.SGD([{'params': model.conv1.parameters()},
# {'params': model.dw_conv.parameters()},
# {'params': model.features.parameters()},
# {'params': model.conv2.parameters()},
# {'params': model.gdconv.parameters()},
# {'params': model.conv3.parameters(), 'weight_decay': 4e-4},
# {'params': model.bn.parameters()},
# {'params': metric_fc.parameters()}],
# lr=args.lr, momentum=args.mom, weight_decay=args.weight_decay, nesterov=True)
# FOR mobileNet PRELU
optimizer = torch.optim.SGD([{
'params': model.parameters(),
'weight_decay': 5e-4
}, {
'params': metric_fc.parameters(),
'weight_decay': 5e-4
}],
lr=0.04,
momentum=0.9,
nesterov=True)
model = nn.DataParallel(model)
metric_fc = nn.DataParallel(metric_fc)
else:
print("Training from pretrained model!: " + str(checkpoint))
checkpoint = torch.load(checkpoint)
# start_epoch = checkpoint['epoch'] + 1
start_epoch = 32
epochs_since_improvement = checkpoint['epochs_since_improvement']
model = checkpoint['model']
metric_fc = checkpoint['metric_fc']
# Enable to use new clasification layer
# metric_fc = ArcMarginProduct()
# metric_fc = nn.DataParallel(metric_fc)
# Enable to use learning rate from pre-trained
# optimizer = checkpoint['optimizer']
# Enable to use new learning rate
# optimizer = torch.optim.SGD([
# {'params': model.parameters(), 'weight_decay': 5e-4},
# {'params': metric_fc.parameters(), 'weight_decay': 5e-4}
# ], lr=0.0004, momentum=0.9, nesterov=True)
optimizer = torch.optim.Adam([{
'params': model.parameters(),
'weight_decay': 5e-4
}, {
'params': metric_fc.parameters(),
'weight_decay': 5e-4
}],
lr=0.001)
# log init
save_dir = os.path.join('logs', 'train' + '_' + exp_name)
if os.path.exists(save_dir):
raise NameError('model dir exists!')
os.makedirs(save_dir)
logger = init_log(save_dir)
# logger = get_logger()
# Move to GPU, if available
model = model.to(device)
metric_fc = metric_fc.to(device)
# Loss function
if args.focal_loss:
criterion = FocalLoss(gamma=args.gamma).to(device)
else:
criterion = nn.CrossEntropyLoss().to(device)
if args.triplet:
metric_fc = AngleLinear()
criterion = AngleLoss()
# Custom dataloaders
dataset = ArcFaceDataset('train')
print(dataset.__len__())
dataset_size = len(dataset)
indices = list(range(dataset_size))
validation_split = 0.02
split = int(np.floor(validation_split * dataset_size))
shuffle_dataset = True
if shuffle_dataset:
np.random.seed(42)
np.random.shuffle(indices)
train_indices, val_indices = indices[split:], indices[:split]
# Creating PT data samplers and loaders:
train_sampler = SubsetRandomSampler(train_indices)
valid_sampler = SubsetRandomSampler(val_indices)
train_loader = torch.utils.data.DataLoader(dataset,
batch_size=args.batch_size,
num_workers=8,
sampler=train_sampler,
pin_memory=True)
validation_loader = torch.utils.data.DataLoader(dataset,
batch_size=16,
num_workers=4,
sampler=valid_sampler,
pin_memory=True)
# scheduler = MultiStepLR(optimizer, milestones=[10, 15, 20], gamma=0.1) # 5, 10, 15, 2
# for i in range(0, start_epoch):
# print('Learning rate={}'.format(optimizer.param_groups[0]['lr']))
# scheduler.step()
# scheduler = ReduceLROnPlateau(optimizer, mode='max', verbose=True)
scheduler = torch.optim.lr_scheduler.OneCycleLR(
optimizer, max_lr=0.01, steps_per_epoch=len(train_loader), epochs=10)
# Epochs
for epoch in range(start_epoch, args.end_epoch):
print('\nLearning rate={}\n'.format(optimizer.param_groups[0]['lr']))
# One epoch's training
train_loss, train_acc = train(train_loader=train_loader,
model=model,
metric_fc=metric_fc,
criterion=criterion,
optimizer=optimizer,
epoch=epoch,
logger=logger,
scheduler=scheduler)
val_acc = validate(val_loader=validation_loader,
model=model,
metric_fc=metric_fc)
lr = optimizer.param_groups[0]['lr']
writer.add_scalar('model/train_loss', train_loss, epoch)
writer.add_scalar('model/train_acc', train_acc, epoch)
writer.add_scalar('model/learning_rate', lr, epoch)
writer.add_scalar('model/val_acc', val_acc, epoch)
# One epoch's validation
lfw_acc, threshold = lfw_test(model)
writer.add_scalar('model/lfw_acc', lfw_acc, epoch)
writer.add_scalar('model/threshold', threshold, epoch)
logger.info('LFW Ave Accuracy: {:.4f}\t'
'Threshold: {:.4f}'.format(
np.mean(lfw_acc) * 100, threshold))
# Check if there was an improvement
is_best = val_acc > best_acc
best_acc = max(val_acc, best_acc)
if not is_best:
epochs_since_improvement += 1
print("\nEpochs since last improvement: %d\n" %
(epochs_since_improvement, ))
else:
epochs_since_improvement = 0
model.train()
# Save checkpoint
save_checkpoint(epoch, epochs_since_improvement, model, metric_fc,
optimizer, best_acc, is_best, train_loss)