def train_autoencoder(device, args):
# model definition
model = FeatureExtractor()
model.to(device)
# data definition
all_chunks = []
# concatenate all chunk files
# note that it is independent of the
# class of each chunk sinc we are creating
# a generative dataset
for label in filesystem.listdir_complete(filesystem.train_audio_chunks_dir):
chunks = filesystem.listdir_complete(label)
all_chunks = all_chunks + chunks
train_chunks, eval_chunks = train_test_split(all_chunks, test_size=args.eval_size)
# transforms and dataset
trf = normalize
train_dataset = GenerativeDataset(train_chunks, transforms=trf)
eval_dataset = GenerativeDataset(eval_chunks, transforms=trf)
train_dataloader = DataLoader(train_dataset, batch_size=args.batch_size, shuffle=True,
num_workers=4, collate_fn=None,pin_memory=True)
eval_dataloader = DataLoader(eval_dataset, batch_size=1, shuffle=True,
num_workers=4, collate_fn=None,pin_memory=True)
# main loop
optimizer = optim.Adam(model.parameters(), lr=args.lr)
loss_criterion = SoftDTW(use_cuda=True, gamma=0.1)
train_count = 0
eval_count = 0
for epoch in range(args.n_epochs):
print('Epoch:', epoch, '/', args.n_epochs)
train_count = train_step(model, train_dataloader, optimizer, loss_criterion, args.verbose_epochs, device, train_count)
eval_count = eval_step(model, eval_dataloader, loss_criterion, args.verbose_epochs, device, eval_count)
torch.save(model.state_dict(), os.path.join(wandb.run.dir, 'model_checkpoint.pt'))
print(
'Test: D_Loss: {:.4f} F_Loss: {:.4f} C_Loss: {:.4f} Acc: {:.4f}'
.format(D_loss, F_loss, C_loss, gesture_acc))
print('Time usage: {:.2f}s'.format(time.time() - epoch_start_time))
# scheduler.step(F_loss)
scheduler_F.step(F_loss)
scheduler_D.step(D_loss)
scheduler_C.step(C_loss)
if F_loss + precision < best_loss:
print('New best validation F_loss: {:.4f}'.format(F_loss))
best_loss = F_loss
best_weights_F = copy.deepcopy(feature_extractor.state_dict())
best_weights_C = copy.deepcopy(label_predictor.state_dict())
best_weights_D = copy.deepcopy(domain_classifier.state_dict())
patience = patience_increase + epoch
print('So Far Patience: ', patience)
print()
# save model
torch.save(best_weights_F, r'saved_model\feature_extractor.pkl')
torch.save(best_weights_C, r'saved_model\label_predictor.pkl')
torch.save(best_weights_D, r'saved_model\domain_classifier.pkl')
print('Model Saved.')
# torch.save(feature_extractor, r'saved_model\m_feature_extractor.pkl')
# torch.save(label_predictor, r'saved_model\m_label_predictor.pkl')
torch.argmax(class_logits, dim=1) == source_label).item()
total_num += source_data.shape[0]
print(i, end='\r')
return running_D_loss / (i + 1), running_F_loss / (
i + 1), total_hit / total_num
# 訓練200 epochs
for epoch in range(1000):
train_D_loss, train_F_loss, train_acc = train_epoch(
source_dataloader,
target_dataloader,
lamb=((2 / (1 + math.exp(-10 * epoch / 999))) - 1))
if (epoch + 1) % 100 == 0:
torch.save(feature_extractor.state_dict(),
f'_semi_lamb_extractor_model_{epoch+1:03d}.bin')
torch.save(label_predictor.state_dict(),
f'_semi_lamb_predictor_model_{epoch+1:03d}.bin')
print(
'epoch {:>3d}: train D loss: {:6.4f}, train F loss: {:6.4f}, acc {:6.4f}'
.format(epoch, train_D_loss, train_F_loss, train_acc))
# test
result = []
label_predictor.eval()
feature_extractor.eval()
for i, (test_data, _) in enumerate(test_dataloader):
test_data = test_data.cuda()
class_logits = label_predictor(feature_extractor(test_data))
def main(num_epochs=10, embedding_dim=256, data_dir="data/"):
""" Function to train the model.
Args:
num_epochs: int
Number of full dataset iterations to train the model.
embedding_dim: int
Output of the CNN model and input of the LSTM embedding size.
data_dir: str
Path to the folder of the data.
"""
device = torch.device("cuda:0" if torch.cuda.is_available() else "cpu")
print(f"WORKING WITH: {device}")
# Define the paths for train and validation
train_json_path = data_dir + "annotations/captions_train2014.json"
train_root_dir = data_dir + "train2014"
valid_json_path = data_dir + "annotations/captions_val2014.json"
valid_root_dir = data_dir + "val2014"
transform = transforms.Compose([
transforms.RandomResizedCrop(224),
transforms.RandomHorizontalFlip(),
transforms.ToTensor(),
transforms.Normalize([0.485, 0.456, 0.406], [0.229, 0.224, 0.225])
])
train_dataset = CocoDataset(json_path=train_json_path,
root_dir=train_root_dir,
transform=transform)
train_coco_dataset = get_data_loader(train_dataset, batch_size=128)
valid_dataset = CocoDataset(json_path=valid_json_path,
root_dir=valid_root_dir,
transform=transform)
valid_coco_dataset = get_data_loader(valid_dataset, batch_size=1)
encoder = FeatureExtractor(embedding_dim).to(device)
decoder = CaptionGenerator(embedding_dim, 512,
len(train_dataset.vocabulary), 1).to(device)
criterion = nn.CrossEntropyLoss()
# params = list(decoder.parameters()) + list(encoder.linear.parameters()) + list(encoder.bn.parameters())
params = list(decoder.parameters()) + list(
encoder.linear.parameters()) + list(encoder.bn.parameters())
optimizer = optim.Adam(params, lr=0.01)
print(f"TRAIN DATASET: {len(train_coco_dataset)}")
print(f"VALID DATASET: {len(valid_coco_dataset)}")
total_step = len(train_coco_dataset)
for epoch in range(num_epochs):
encoder.train()
decoder.train()
train_loss = 0.0
valid_loss = 0.0
for i, (images, captions,
descriptions) in enumerate(train_coco_dataset):
# targets = pack_padded_sequence(caption, 0, batch_first=True)[0]
images = images.to(device)
captions = captions.to(device)
# targets = pack_padded_sequence(captions, lengths, batch_first=True)[0]
features = encoder(images)
outputs = decoder(features, captions)
loss = criterion(outputs.view(-1, len(train_dataset.vocabulary)),
captions.view(-1))
# bleu = calculate_bleu(decoder, features, descriptions, coco_dataset)
# print(bleu)
encoder.zero_grad()
decoder.zero_grad()
loss.backward()
optimizer.step()
# Print log info
train_loss += loss.item()
'''
if i % 10 == 0:
print('Epoch [{}/{}], Step [{}/{}], Loss: {:.4f}, Perplexity: {:5.4f}'
.format(epoch, num_epochs, i, total_step, loss.item(), np.exp(loss.item())))
'''
# Save the model checkpoints
if (i + 1) % 1000 == 0:
torch.save(
decoder.state_dict(),
os.path.join("models",
'decoder-{}-{}.ckpt'.format(epoch + 1,
i + 1)))
torch.save(
encoder.state_dict(),
os.path.join("models",
'encoder-{}-{}.ckpt'.format(epoch + 1,
i + 1)))
encoder.eval()
decoder.eval()
bleu = 0.0
for i, (images, captions,
descriptions) in enumerate(valid_coco_dataset):
if (i > 80000):
break
images = images.to(device)
captions = captions.to(device)
features = encoder(images)
outputs = decoder(features, captions)
loss = criterion(outputs.view(-1, len(train_dataset.vocabulary)),
captions.view(-1))
valid_loss += loss.item()
bleu += calculate_bleu(decoder, features, descriptions,
train_coco_dataset)
# print(f"BLEU: {bleu / 10000}")
print(
"Epoch: {}, Train Loss: {:.4f}, Valid Loss: {:.4f}, BLEU: {:.4f}".
format(epoch, train_loss / len(train_coco_dataset),
valid_loss / 80000, bleu / 80000))