def triplet_loss_with_knn_exp(device='3',
ckpt_prefix='Run01',
lr=1e-3,
pretrain_epochs=50,
batch_all_epochs=30,
batch_hard_epochs=80,
n_classes=10,
n_samples=12,
margin=0.3,
log_interval=50,
log_level="INFO",
k=3,
squared=False,
embed_dims=64,
embed_net='vgg',
is_train_embedding_model=False,
using_pretrain=False,
batch_size=128,
select_method='batch_all_and_hard',
soft_margin=True):
"""
knn as classifier.
:param device:
:param lr:
:param n_epochs:
:param n_classes:
:param n_samples:
:param k: kNN parameter
:return:
"""
SEED = 0
torch.manual_seed(SEED)
torch.cuda.manual_seed(SEED)
np.random.seed(SEED)
kwargs = locals()
log_file = '{}/ckpt/{}_with_knn_exp/{}.log'.format(ROOT_DIR, select_method,
ckpt_prefix)
if not os.path.exists(os.path.dirname(log_file)):
os.makedirs(os.path.dirname(log_file))
logging.basicConfig(filename=log_file,
level=getattr(logging, log_level.upper(), None))
logging.info(str(kwargs))
os.environ['CUDA_VISIBLE_DEVICES'] = str(device)
# get the mean and std of dataset train/a
standarizer = TaskbStandarizer(data_manager=Dcase18TaskbData())
mu, sigma = standarizer.load_mu_sigma(mode='train', device='a')
# get the normalized train dataset
train_dataset = DevSet(mode='train',
device='a',
transform=Compose(
[Normalize(mean=mu, std=sigma),
ToTensor()]))
test_dataset = DevSet(mode='test',
device='a',
transform=Compose(
[Normalize(mean=mu, std=sigma),
ToTensor()]))
train_batch_sampler = BalanceBatchSampler(dataset=train_dataset,
n_classes=n_classes,
n_samples=n_samples)
train_batch_loader = DataLoader(dataset=train_dataset,
batch_sampler=train_batch_sampler,
num_workers=1)
test_loader = DataLoader(dataset=test_dataset,
batch_size=batch_size,
shuffle=False,
num_workers=1)
if embed_net == 'vgg':
model = networks.vggish_bn(classify=using_pretrain)
elif embed_net == 'shallow':
model = networks.embedding_net_shallow()
else:
print("{} doesn't exist!".format(embed_net))
return
model = model.cuda()
if is_train_embedding_model:
if using_pretrain:
pt_loss_fn = nn.CrossEntropyLoss()
pt_optimizer = optim.Adam(model.parameters(), lr=lr)
pt_scheduler = lr_scheduler.StepLR(optimizer=pt_optimizer,
step_size=30,
gamma=0.5)
pt_train_hist = History(name='pretrain_train/a')
pt_val_hist = History(name='pretrain_test/a')
pt_ckpter = CheckPoint(model=model,
optimizer=pt_optimizer,
path='{}/ckpt/{}_with_knn_exp'.format(
ROOT_DIR, select_method),
prefix=(ckpt_prefix + 'pretrain'),
interval=1,
save_num=1)
for epoch in range(1, pretrain_epochs + 1):
pt_scheduler.step()
train_loss, metrics = train_epoch(
train_loader=train_batch_loader,
model=model,
loss_fn=pt_loss_fn,
optimizer=pt_optimizer,
log_interval=log_interval,
metrics=[AccumulatedAccuracyMetric()])
train_logs = {'loss': train_loss}
for metric in metrics:
train_logs[metric.name()] = metric.value()
pt_train_hist.add(logs=train_logs, epoch=epoch)
test_loss, metrics = test_epoch(
val_loader=test_loader,
model=model,
loss_fn=pt_loss_fn,
metrics=[AccumulatedAccuracyMetric()])
test_logs = {'loss': test_loss}
for metric in metrics:
test_logs[metric.name()] = metric.value()
pt_val_hist.add(logs=test_logs, epoch=epoch)
pt_train_hist.clear()
pt_train_hist.plot()
pt_val_hist.plot()
logging.info('Epoch{:04d}, {:15}, {}'.format(
epoch, pt_train_hist.name, str(pt_train_hist.recent)))
logging.info('Epoch{:04d}, {:15}, {}'.format(
epoch, pt_val_hist.name, str(pt_val_hist.recent)))
pt_ckpter.check_on(epoch=epoch,
monitor='acc',
loss_acc=pt_val_hist.recent)
best_pt_model_filename = Reporter(ckpt_root=os.path.join(ROOT_DIR, 'ckpt'), exp='{}_with_knn_exp'.\
format(select_method)).select_best(run=(ckpt_prefix + 'pretrain')).selected_ckpt
model.load_state_dict(
torch.load(best_pt_model_filename)['model_state_dict'])
model.set_classify(False)
if select_method == 'batch_all':
loss_fn = BatchAllTripletLoss(margin=margin,
squared=squared,
soft_margin=soft_margin)
elif select_method == 'batch_hard':
loss_fn = BatchHardTripletLoss(margin=margin,
squared=squared,
soft_margin=soft_margin)
elif select_method == 'random_hard':
loss_fn = RandomHardTripletLoss(
margin=margin,
triplet_selector=RandomNegativeTripletSelector(margin=margin),
squared=squared,
soft_margin=soft_margin)
elif select_method == 'batch_all_and_hard':
loss_fn_ba = BatchAllTripletLoss(margin=margin,
squared=squared,
soft_margin=soft_margin)
loss_fn_bh = BatchHardTripletLoss(margin=margin,
squared=squared,
soft_margin=soft_margin)
else:
print("{} is not defined!".format(select_method))
return
optimizer = optim.Adam(model.parameters(), lr=lr)
scheduler = lr_scheduler.StepLR(optimizer=optimizer,
step_size=30,
gamma=0.5)
train_hist = History(name='train/a')
val_hist = History(name='test/a')
ckpter = CheckPoint(model=model,
optimizer=optimizer,
path='{}/ckpt/{}_with_knn_exp'.format(
ROOT_DIR, select_method),
prefix=ckpt_prefix,
interval=1,
save_num=1)
for epoch in range(1, batch_all_epochs + batch_hard_epochs + 1):
scheduler.step()
if epoch <= batch_all_epochs:
cur_loss_fn = loss_fn_ba
else:
cur_loss_fn = loss_fn_bh
train_loss, metrics = train_epoch(
train_loader=train_batch_loader,
model=model,
loss_fn=cur_loss_fn,
optimizer=optimizer,
log_interval=log_interval,
metrics=[AverageNoneZeroTripletsMetric()])
train_logs = dict()
train_logs['loss'] = train_loss
for metric in metrics:
train_logs[metric.name()] = metric.value()
train_hist.add(logs=train_logs, epoch=epoch)
# TODO sklearn knn
test_acc = kNN(model=model,
train_loader=train_batch_loader,
test_loader=test_loader,
k=k)
test_logs = {'acc': test_acc}
val_hist.add(logs=test_logs, epoch=epoch)
train_hist.clear()
train_hist.plot()
val_hist.plot()
logging.info('Epoch{:04d}, {:15}, {}'.format(
epoch, train_hist.name, str(train_hist.recent)))
logging.info('Epoch{:04d}, {:15}, {}'.format(
epoch, val_hist.name, str(val_hist.recent)))
ckpter.check_on(epoch=epoch,
monitor='acc',
loss_acc=val_hist.recent)
# reload best embedding model
best_model_filename = Reporter(ckpt_root=os.path.join(ROOT_DIR, 'ckpt'), exp='{}_with_knn_exp'.\
format(select_method)).select_best(run=ckpt_prefix).selected_ckpt
model.load_state_dict(torch.load(best_model_filename)['model_state_dict'])
train_embedding, train_labels = extract_embeddings(train_batch_loader,
model, embed_dims)
test_embedding, test_labels = extract_embeddings(test_loader, model,
embed_dims)
xgb_cls(train_data=train_embedding,
train_label=train_labels,
val_data=test_embedding,
val_label=test_labels,
exp_dir=os.path.dirname(log_file))
# TODO plot all curve
if using_pretrain:
pt_train_hist.plot()
pt_val_hist.plot()
def batch_hard_with_knn_exp(device='3',
ckpt_prefix='Run01',
lr=1e-3,
embedding_epochs=10,
classify_epochs=100,
n_classes=10,
n_samples=12,
margin=0.3,
log_interval=50,
log_level="INFO",
k=3,
squared=False):
"""
knn as classifier.
:param device:
:param lr:
:param n_epochs:
:param n_classes:
:param n_samples:
:param k: kNN parameter
:return:
"""
SEED = 0
torch.manual_seed(SEED)
torch.cuda.manual_seed(SEED)
np.random.seed(SEED)
kwargs = locals()
log_file = '{}/ckpt/batch_hard_with_knn_exp/{}.log'.format(
ROOT_DIR, ckpt_prefix)
if not os.path.exists(os.path.dirname(log_file)):
os.makedirs(os.path.dirname(log_file))
logging.basicConfig(filename=log_file,
level=getattr(logging, log_level.upper(), None))
logging.info(str(kwargs))
os.environ['CUDA_VISIBLE_DEVICES'] = str(device)
# get the mean and std of dataset train/a
standarizer = TaskbStandarizer(data_manager=Dcase18TaskbData())
mu, sigma = standarizer.load_mu_sigma(mode='train', device='a')
# get the normalized train dataset
train_dataset = DevSet(mode='train',
device='a',
transform=Compose(
[Normalize(mean=mu, std=sigma),
ToTensor()]))
test_dataset = DevSet(mode='test',
device='a',
transform=Compose(
[Normalize(mean=mu, std=sigma),
ToTensor()]))
train_batch_sampler = BalanceBatchSampler(dataset=train_dataset,
n_classes=n_classes,
n_samples=n_samples)
train_batch_loader = DataLoader(dataset=train_dataset,
batch_sampler=train_batch_sampler,
num_workers=1)
test_batch_sampler = BalanceBatchSampler(dataset=test_dataset,
n_classes=n_classes,
n_samples=n_samples)
test_batch_loader = DataLoader(dataset=test_dataset,
batch_sampler=test_batch_sampler,
num_workers=1)
model = networks.embedding_net_shallow()
model = model.cuda()
loss_fn = HardTripletLoss(margin=margin, hardest=True, squared=squared)
optimizer = optim.Adam(model.parameters(), lr=lr)
scheduler = lr_scheduler.StepLR(optimizer=optimizer,
step_size=30,
gamma=0.5)
# fit(train_loader=train_batch_loader, val_loader=test_batch_loader, model=model, loss_fn=loss_fn,
# optimizer=optimizer, scheduler=scheduler, n_epochs=embedding_epochs, log_interval=log_interval,
# metrics=[AverageNoneZeroTripletsMetric()])
train_hist = History(name='train/a')
val_hist = History(name='test/a')
ckpter = CheckPoint(
model=model,
optimizer=optimizer,
path='{}/ckpt/batch_hard_with_knn_exp'.format(ROOT_DIR),
prefix=ckpt_prefix,
interval=1,
save_num=1)
for epoch in range(1, embedding_epochs + 1):
scheduler.step()
train_loss, metrics = train_epoch(
train_loader=train_batch_loader,
model=model,
loss_fn=loss_fn,
optimizer=optimizer,
log_interval=log_interval,
metrics=[AverageNoneZeroTripletsMetric()])
train_logs = dict()
train_logs['loss'] = train_loss
for metric in metrics:
train_logs[metric.name()] = metric.value()
train_hist.add(logs=train_logs, epoch=epoch)
test_acc = kNN(model=model,
train_loader=train_batch_loader,
test_loader=test_batch_loader,
k=k)
test_logs = {'acc': test_acc}
val_hist.add(logs=test_logs, epoch=epoch)
train_hist.clear()
train_hist.plot()
val_hist.plot()
logging.info('Epoch{:04d}, {:15}, {}'.format(epoch, train_hist.name,
str(train_hist.recent)))
logging.info('Epoch{:04d}, {:15}, {}'.format(epoch, val_hist.name,
str(val_hist.recent)))
ckpter.check_on(epoch=epoch, monitor='acc', loss_acc=val_hist.recent)
# train classifier using learned embeddings.
classify_model = networks.classifier()
classify_model = classify_model.cuda()
classify_loss_fn = nn.CrossEntropyLoss()
classify_optimizer = optim.Adam(classify_model.parameters(), lr=lr)
classify_scheduler = lr_scheduler.StepLR(optimizer=classify_optimizer,
step_size=30,
gamma=0.5)
classify_train_hist = History(name='classify_train/a')
classify_val_hist = History(name='classify_val/a')
classify_ckpter = CheckPoint(
model=classify_model,
optimizer=classify_optimizer,
path='{}/ckpt/batch_hard_with_knn_exp'.format(ROOT_DIR),
prefix=ckpt_prefix,
interval=1,
save_num=1)
# reload best embedding model
best_model_filename = Reporter(ckpt_root=os.path.join(ROOT_DIR, 'ckpt'),
exp='batch_hard_with_knn_exp').select_best(
run=ckpt_prefix).selected_ckpt
model.load_state_dict(torch.load(best_model_filename)['model_state_dict'])
train_embedding, train_labels = extract_embeddings(train_batch_loader,
model, 128)
test_embedding, test_labels = extract_embeddings(test_batch_loader, model,
128)
classify_train_dataset = DatasetWrapper(data=train_embedding,
labels=train_labels,
transform=ToTensor())
classify_test_dataset = DatasetWrapper(data=test_embedding,
labels=test_labels,
transform=ToTensor())
classify_train_loader = DataLoader(dataset=classify_train_dataset,
batch_size=128,
shuffle=True,
num_workers=1)
classify_test_loader = DataLoader(dataset=classify_test_dataset,
batch_size=128,
shuffle=False,
num_workers=1)
fit(train_loader=classify_train_loader,
val_loader=classify_test_loader,
model=classify_model,
loss_fn=classify_loss_fn,
optimizer=classify_optimizer,
scheduler=classify_scheduler,
n_epochs=classify_epochs,
log_interval=log_interval,
metrics=[AccumulatedAccuracyMetric()],
train_hist=classify_train_hist,
val_hist=classify_val_hist,
ckpter=classify_ckpter,
logging=logging)
def hard_triplet_baseline_exp(device='3',
ckpt_prefix='Run01',
lr=1e-3,
n_epochs=300,
n_classes=10,
n_samples=12,
margin=0.3,
log_interval=50,
log_level="INFO"):
"""
:param device:
:param lr:
:param n_epochs:
:param n_classes:
:param n_samples:
:return:
"""
kwargs = locals()
log_file = '{}/ckpt/hard_triplet_baseline_exp/{}.log'.format(
ROOT_DIR, ckpt_prefix)
if not os.path.exists(os.path.dirname(log_file)):
os.makedirs(os.path.dirname(log_file))
logging.basicConfig(filename=log_file,
level=getattr(logging, log_level.upper(), None))
logging.info(str(kwargs))
os.environ['CUDA_VISIBLE_DEVICES'] = str(device)
# get the mean and std of dataset train/a
standarizer = TaskbStandarizer(data_manager=Dcase18TaskbData())
mu, sigma = standarizer.load_mu_sigma(mode='train', device='a')
# get the normalized train dataset
train_dataset = DevSet(mode='train',
device='a',
transform=Compose(
[Normalize(mean=mu, std=sigma),
ToTensor()]))
test_dataset = DevSet(mode='test',
device='a',
transform=Compose(
[Normalize(mean=mu, std=sigma),
ToTensor()]))
train_batch_sampler = BalanceBatchSampler(dataset=train_dataset,
n_classes=n_classes,
n_samples=n_samples)
train_batch_loader = DataLoader(dataset=train_dataset,
batch_sampler=train_batch_sampler,
num_workers=1)
test_batch_sampler = BalanceBatchSampler(dataset=test_dataset,
n_classes=n_classes,
n_samples=n_samples)
test_batch_loader = DataLoader(dataset=test_dataset,
batch_sampler=test_batch_sampler,
num_workers=1)
model = networks.embedding_net_shallow()
model = model.cuda()
loss_fn = RandomHardTripletLoss(
margin=margin,
triplet_selector=RandomNegativeTripletSelector(margin=margin))
optimizer = optim.Adam(model.parameters(), lr=lr)
scheduler = lr_scheduler.StepLR(optimizer=optimizer,
step_size=30,
gamma=0.5)
fit(train_loader=train_batch_loader,
val_loader=test_batch_loader,
model=model,
loss_fn=loss_fn,
optimizer=optimizer,
scheduler=scheduler,
n_epochs=n_epochs,
log_interval=log_interval,
metrics=[AverageNoneZeroTripletsMetric()])
verification(model=model)
train_embedding_tl, train_labels_tl = extract_embeddings(
train_batch_loader, model, 64)
# utils.plot_embeddings(embeddings=train_embedding_tl, targets=train_labels_tl, title='train set')
test_embedding_tl, test_labels_tl = extract_embeddings(
test_batch_loader, model, 64)
# utils.plot_embeddings(embeddings=test_embedding_tl, targets=test_labels_tl, title='test set')
model2 = networks.classifier()
model2 = model2.cuda()
loss_fn2 = nn.CrossEntropyLoss()
optimizer2 = optim.Adam(model2.parameters(), lr=lr)
scheduler2 = lr_scheduler.StepLR(optimizer=optimizer2,
step_size=30,
gamma=0.5)
train_dataset2 = DatasetWrapper(data=train_embedding_tl,
labels=train_labels_tl,
transform=ToTensor())
test_dataset2 = DatasetWrapper(data=test_embedding_tl,
labels=test_labels_tl,
transform=ToTensor())
train_loader2 = DataLoader(dataset=train_dataset2,
batch_size=128,
shuffle=True,
num_workers=1)
test_loader2 = DataLoader(dataset=test_dataset2,
batch_size=128,
shuffle=False,
num_workers=1)
train_hist = History(name='train/a')
val_hist = History(name='val/a')
ckpter = CheckPoint(
model=model,
optimizer=optimizer,
path='{}/ckpt/hard_triplet_baseline_exp'.format(ROOT_DIR),
prefix=ckpt_prefix,
interval=1,
save_num=1)
fit(train_loader=train_loader2,
val_loader=test_loader2,
model=model2,
loss_fn=loss_fn2,
optimizer=optimizer2,
scheduler=scheduler2,
n_epochs=n_epochs,
log_interval=log_interval,
metrics=[AccumulatedAccuracyMetric()],
train_hist=train_hist,
val_hist=val_hist,
ckpter=ckpter,
logging=logging)
def hard_triplet_baseline_exp(device='3',
lr=1e-3,
n_epochs=300,
n_classes=10,
n_samples=12,
margin=0.3,
log_interval=50):
"""
:param device:
:param lr:
:param n_epochs:
:param n_classes:
:param n_samples:
:return:
"""
os.environ['CUDA_VISIBLE_DEVICES'] = str(device)
# get the mean and std of dataset train/a
standarizer = TaskbStandarizer(data_manager=Dcase18TaskbData())
mu, sigma = standarizer.load_mu_sigma(mode='train', device='a')
# get the normalized train dataset
train_dataset = DevSet(mode='train',
device='a',
transform=Compose(
[Normalize(mean=mu, std=sigma),
ToTensor()]))
test_dataset = DevSet(mode='test',
device='a',
transform=Compose(
[Normalize(mean=mu, std=sigma),
ToTensor()]))
train_batch_sampler = BalanceBatchSampler(dataset=train_dataset,
n_classes=n_classes,
n_samples=n_samples)
train_batch_loader = DataLoader(dataset=train_dataset,
batch_sampler=train_batch_sampler,
num_workers=1)
test_batch_sampler = BalanceBatchSampler(dataset=test_dataset,
n_classes=n_classes,
n_samples=n_samples)
test_batch_loader = DataLoader(dataset=test_dataset,
batch_sampler=test_batch_sampler,
num_workers=1)
model = networks.embedding_net_shallow()
model = model.cuda()
loss_fn = OnlineTripletLoss(
margin=margin,
triplet_selector=utils.RandomNegativeTripletSelector(margin=margin))
optimizer = optim.Adam(model.parameters(), lr=lr)
scheduler = lr_scheduler.StepLR(optimizer=optimizer,
step_size=30,
gamma=0.5)
fit(train_loader=train_batch_loader,
val_loader=test_batch_loader,
model=model,
loss_fn=loss_fn,
optimizer=optimizer,
scheduler=scheduler,
n_epochs=n_epochs,
log_interval=log_interval,
metrics=[AverageNoneZeroTripletsMetric()])
train_embedding_tl, train_labels_tl = utils.extract_embeddings(
train_batch_loader, model)
utils.plot_embeddings(train_embedding_tl, train_labels_tl)
test_embedding_tl, test_labels_tl = utils.extract_embeddings(
test_batch_loader, model)
utils.plot_embeddings(test_embedding_tl, test_labels_tl)
def batch_all_total_with_knn_exp(device='0',
ckpt_prefix='Run01',
lr=1e-3,
embedding_epochs=10,
classify_epochs=100,
n_classes=10,
n_samples=12,
batch_size=128,
margin=0.3,
log_interval=50,
log_level="INFO",
k=3,
squared=False,
embed_dims=64,
embed_net='vgg'):
"""
Using the entire data set, including device A, B, C.
Using the batch all method to select the triplets, kNN as the verification
Finally, using a linear classifier to classify the extraction into embeddings.
:param device:
:param lr:
:param n_epochs:
:param n_classes:
:param n_samples:
:param k: kNN parameter
:return:
"""
SEED = 0
torch.manual_seed(SEED)
torch.cuda.manual_seed(SEED)
np.random.seed(SEED)
kwargs = locals()
log_file = '{}/ckpt/batch_all_total_with_knn_exp/{}.log'.format(
ROOT_DIR, ckpt_prefix)
if not os.path.exists(os.path.dirname(log_file)):
os.makedirs(os.path.dirname(log_file))
logging.basicConfig(filename=log_file,
level=getattr(logging, log_level.upper(), None))
logging.info(str(kwargs))
os.environ['CUDA_VISIBLE_DEVICES'] = str(device)
# get the mean and std of dataset train/a
standarizer = TaskbStandarizer(data_manager=Dcase18TaskbData())
mu, sigma = standarizer.load_mu_sigma(mode='train', device='abc')
# get the normalized train dataset
train_dataset = DevSet(mode='train',
device='abc',
transform=Compose(
[Normalize(mean=mu, std=sigma),
ToTensor()]))
# get the normalized test dataset
test_dataset = {}
device_list = ['a', 'b', 'c', 'bc']
for device in device_list:
test_dataset[device] = DevSet(
mode='test',
device=device,
transform=Compose([Normalize(mean=mu, std=sigma),
ToTensor()]))
train_batch_sampler = BalanceBatchSampler(dataset=train_dataset,
n_classes=n_classes,
n_samples=n_samples)
train_batch_loader = DataLoader(dataset=train_dataset,
batch_sampler=train_batch_sampler,
num_workers=1)
test_loader = {}
for device in device_list:
test_loader[device] = DataLoader(dataset=test_dataset[device],
batch_size=batch_size,
shuffle=False,
num_workers=1)
# network architecture
if embed_net == 'vgg':
model = networks.vggish_bn()
elif embed_net == 'shallow':
model = networks.embedding_net_shallow()
else:
print("{} network doesn't exist.".format(embed_net))
return
# to gpu
model = model.cuda()
loss_fn = BatchAllTripletLoss(margin=margin,
squared=squared,
soft_margin=False)
optimizer = optim.Adam(model.parameters(), lr=lr)
scheduler = lr_scheduler.StepLR(optimizer=optimizer,
step_size=30,
gamma=0.5)
train_hist = History(name='train/a')
val_hist = {}
for device in device_list:
val_hist[device] = History(name=('test/' + str(device)))
# learning embedding checkpointer.
ckpter = CheckPoint(
model=model,
optimizer=optimizer,
path='{}/ckpt/batch_all_total_with_knn_exp'.format(ROOT_DIR),
prefix=ckpt_prefix,
interval=1,
save_num=1)
# training embedding network
for epoch in range(1, embedding_epochs + 1):
scheduler.step()
train_loss, metrics = train_epoch(
train_loader=train_batch_loader,
model=model,
loss_fn=loss_fn,
optimizer=optimizer,
log_interval=log_interval,
metrics=[AverageNoneZeroTripletsMetric()])
train_logs = {'loss': train_loss}
for metric in metrics:
train_logs[metric.name()] = metric.value()
train_hist.add(logs=train_logs, epoch=epoch)
for device in device_list:
test_acc = kNN(model=model,
train_loader=train_batch_loader,
test_loader=test_loader[device],
k=k)
test_logs = {'acc': test_acc}
val_hist[device].add(logs=test_logs, epoch=epoch)
train_hist.clear()
train_hist.plot()
logging.info('Epoch{:04d}, {:15}, {}'.format(epoch, train_hist.name,
str(train_hist.recent)))
for device in device_list:
val_hist[device].plot()
logging.info('Epoch{:04d}, {:15}, {}'.format(
epoch, val_hist[device].name, str(val_hist[device].recent)))
ckpter.check_on(epoch=epoch,
monitor='acc',
loss_acc=val_hist['bc'].recent)
# train classifier using learned embeddings.
classify_model = networks.classifier()
classify_model = classify_model.cuda()
classify_loss_fn = nn.CrossEntropyLoss()
classify_optimizer = optim.Adam(classify_model.parameters(), lr=lr)
classify_scheduler = lr_scheduler.StepLR(optimizer=classify_optimizer,
step_size=30,
gamma=0.5)
classify_train_hist = History(name='classify_train/a')
classify_val_hist = {}
for device in device_list:
classify_val_hist[device] = History(name=('classify_val/' +
str(device)))
classify_ckpter = CheckPoint(
model=classify_model,
optimizer=classify_optimizer,
path='{}/ckpt/batch_all_total_with_knn_exp'.format(ROOT_DIR),
prefix=ckpt_prefix,
interval=1,
save_num=1)
# reload best embedding model
best_model_filename = Reporter(
ckpt_root=os.path.join(ROOT_DIR, 'ckpt'),
exp='batch_all_total_with_knn_exp').select_best(
run=ckpt_prefix).selected_ckpt
model.load_state_dict(torch.load(best_model_filename)['model_state_dict'])
# learned best embeddings
train_embedding, train_labels = extract_embeddings(train_batch_loader,
model, embed_dims)
test_embedding, test_labels = {}, {}
for device in device_list:
test_embedding[device], test_labels[device] = extract_embeddings(
test_loader[device], model, embed_dims)
# wrap embeddings(numpy) to Dataset
classify_train_dataset = DatasetWrapper(data=train_embedding,
labels=train_labels,
transform=ToTensor())
classify_test_dataset = {}
for device in device_list:
classify_test_dataset[device] = DatasetWrapper(
data=test_embedding[device],
labels=test_labels[device],
transform=ToTensor())
classify_train_loader = DataLoader(dataset=classify_train_dataset,
batch_size=batch_size,
shuffle=True,
num_workers=1)
classify_test_loader = {}
for device in device_list:
classify_test_loader[device] = DataLoader(
dataset=classify_test_dataset[device],
batch_size=batch_size,
shuffle=False,
num_workers=1)
fit(train_loader=classify_train_loader,
val_loader=classify_test_loader,
model=classify_model,
loss_fn=classify_loss_fn,
optimizer=classify_optimizer,
scheduler=classify_scheduler,
n_epochs=classify_epochs,
log_interval=log_interval,
metrics=[AccumulatedAccuracyMetric()],
train_hist=classify_train_hist,
val_hist=classify_val_hist,
ckpter=classify_ckpter,
logging=logging)
embed_dims)
train_embedding = np.concatenate(
(embedding_A, embedding_B, embedding_C))
train_labels = np.concatenate((labels_A, labels_B, labels_C))
test_embedding, test_labels = extract_embeddings(
test_loader, model, embed_dims)
else:
train_embedding, train_labels = extract_embeddings(
train_loader, model, embed_dims)
test_embedding, test_labels = extract_embeddings(
test_loader, model, embed_dims)
distance_matrix = get_distance_matrix2(test_embedding, train_embedding)
sorted_index = np.argsort(distance_matrix, axis=1)
predict_labels = []
for i in range(len(test_embedding)):
class_cnt = np.zeros([cls_num])
k_neighbor = train_labels[sorted_index[i]]
for j in range(k):
class_cnt[int(k_neighbor[j])] += 1
predict_labels.append(np.argmax(class_cnt))
predict_labels = np.array(predict_labels)
# test_acc = (test_labels == predict_labels).sum() / len(test_labels)
test_acc = np.mean(test_labels == predict_labels)
return test_acc
if __name__ == '__main__':
model = networks.embedding_net_shallow()
model = model.cuda()
verification(model=model)
