writer.add_scalar('Learning Rate', optimizer.param_groups[0]['lr'], epoch)
writer.add_scalar('Stat. Parity/%s' % split, tot_stat_par.mean(), epoch)
writer.add_scalar('Equalized Odds/%s' % split, tot_eq_odds.mean(), epoch)
writer.add_histogram('L-inf Differences/%s' % split, l_inf_diffs, epoch)
return tot_mix_loss
print('saving model to', models_dir)
writer = SummaryWriter(log_dir)
for epoch in range(args.num_epochs):
run(autoencoder, classifier, optimizer, train_loader, 'train', epoch)
autoencoder.eval()
classifier.eval()
valid_mix_loss = run(
autoencoder, classifier, optimizer, val_loader, 'valid', epoch
)
scheduler.step(valid_mix_loss.mean())
torch.save(
autoencoder.state_dict(),
path.join(models_dir, f'autoencoder_{epoch}.pt')
)
torch.save(
classifier.state_dict(),
path.join(models_dir, f'classifier_{epoch}.pt')
)
writer.close()
def train(batch_size=64, window_size=3, epochs=100):
train_dataset = SupervisedDataset(mode='train',
window_size=window_size,
log_reg=True)
train_loader = DataLoader(train_dataset,
batch_size=batch_size,
shuffle=True)
val_dataset = SupervisedDataset(mode='val',
window_size=window_size,
log_reg=True)
val_loader = DataLoader(val_dataset, batch_size=batch_size, shuffle=True)
base_lr_rate = 1e-3
weight_decay = 1e-6 #0.000016
#model = LSTM(input_size=78, hidden_size=128, num_classes=170, n_layers=2).to(device=torch.device('cuda:0'))
model = LogisticRegression(
num_keypoints=78, num_features=2,
num_classes=170).to(device=torch.device('cuda:0'))
'''
for name, param in model.named_parameters():
if 'bias' in name:
nn.init.constant_(param, 0.0)
elif 'weight' in name:
nn.init.xavier_uniform_(param)
'''
criterion = nn.BCEWithLogitsLoss(
) # Use this for Logistic Regression training
#criterion = nn.BCELoss() # Use this for LSTM training (with Softmax)
optimizer = optim.Adam(
model.parameters(),
lr=base_lr_rate) #, weight_decay=weight_decay, amsgrad=True)
best_epoch_train_accuracy = 0.0
best_epoch_val_accuracy = 0.0
for current_epoch in range(epochs):
current_train_iter = 0
current_val_iter = 0
running_train_loss = 0.0
current_average_train_loss = 0.0
running_val_loss = 0.0
current_average_val_loss = 0.0
num_train_data = 0
num_val_data = 0
running_train_correct_preds = 0
running_train_correct_classwise_preds = [0] * 170
running_val_correct_preds = 0
running_val_correct_classwise_preds = [0] * 170
for phase in ['train', 'val']:
# Train loop
if phase == 'train':
train_epoch_since = time.time()
model.train()
for train_batch_window, train_batch_label in train_loader:
current_train_iter += 1
outs = model(train_batch_window)
#scheduler = poly_lr_scheduler(optimizer = optimizer, init_lr = base_lr_rate, iter = current_iter, lr_decay_iter = 1,
# max_iter = max_iter, power = power) # max_iter = len(train_loader)
optimizer.zero_grad()
loss = criterion(outs, train_batch_label)
gt_confidence, gt_index = torch.max(train_batch_label,
dim=1)
#loss = criterion(outs, gt_index)
running_train_loss += loss.item()
current_average_train_loss = running_train_loss / current_train_iter
loss.backward(retain_graph=False)
optimizer.step()
pred_confidence, pred_index = torch.max(outs, dim=1)
#gt_confidence, gt_index = torch.max(train_batch_label, dim=1)
batch_correct_preds = torch.eq(
pred_index, gt_index).long().sum().item()
batch_accuracy = (batch_correct_preds /
train_batch_window.shape[0]) * 100
num_train_data += train_batch_window.shape[0]
running_train_correct_preds += batch_correct_preds
if current_train_iter % 10 == 0:
#print(outs)
print(
f"\nITER#{current_train_iter} ({current_epoch+1}) BATCH TRAIN ACCURACY: {batch_accuracy:.4f}, RUNNING TRAIN LOSS: {loss.item():.8f}"
)
print(
f"Predicted / GT index:\n{pred_index}\n{gt_index}\n"
)
last_epoch_average_train_loss = current_average_train_loss
epoch_accuracy = (running_train_correct_preds /
num_train_data) * 100
print(
f"\n\nEPOCH#{current_epoch+1} EPOCH TRAIN ACCURACY (BEST): {epoch_accuracy:.4f} ({best_epoch_train_accuracy:.4f}), AVERAGE TRAIN LOSS: {last_epoch_average_train_loss:.8f}\n\n"
)
if epoch_accuracy > best_epoch_train_accuracy:
best_epoch_train_accuracy = epoch_accuracy
torch.save(
model.state_dict(),
f"./model_params/logistic_regression/train/train_logreg_epoch{current_epoch+1}_acc{best_epoch_train_accuracy:.4f}.pth"
)
print("\n\nSAVED BASED ON TRAIN ACCURACY!\n\n")
train_time_elapsed = time.time() - train_epoch_since
# Validation loop
elif phase == 'val':
val_epoch_since = time.time()
model.eval()
with torch.no_grad():
for val_batch_window, val_batch_label in val_loader:
current_val_iter += 1
outs = model(val_batch_window)
gt_confidence, gt_index = torch.max(val_batch_label,
dim=1)
val_loss = criterion(outs, val_batch_label)
#val_loss = criterion(outs, gt_index)
running_val_loss += val_loss.item()
current_average_val_loss = running_val_loss / current_val_iter
pred_confidence, pred_index = torch.max(outs, dim=1)
#gt_confidence, gt_index = torch.max(val_batch_label, dim=1)
batch_correct_preds = torch.eq(
pred_index, gt_index).long().sum().item()
batch_accuracy = (batch_correct_preds /
val_batch_window.shape[0]) * 100
num_val_data += val_batch_window.shape[0]
running_val_correct_preds += batch_correct_preds
if current_val_iter % 10 == 0:
print(
f"\nITER#{current_val_iter} ({current_epoch+1}) BATCH VALIDATION ACCURACY: {batch_accuracy:.4f}, RUNNING VALIDATION LOSS: {val_loss.item():.8f}"
)
print(
f"Predicted / GT index:\n{pred_index}\n{gt_index}\n"
)
last_epoch_average_val_loss = current_average_val_loss
epoch_accuracy = (running_val_correct_preds /
num_val_data) * 100
print(
f"\n\nEPOCH#{current_epoch+1} EPOCH VALIDATION ACCURACY (BEST): {epoch_accuracy:.4f} ({best_epoch_val_accuracy:.4f}), AVERAGE VALIDATION LOSS: {last_epoch_average_val_loss:.8f}\n\n"
)
if epoch_accuracy > best_epoch_val_accuracy:
best_epoch_val_accuracy = epoch_accuracy
torch.save(
model.state_dict(),
f"./model_params/logistic_regression/val/val_logreg_epoch{current_epoch+1}_acc{best_epoch_val_accuracy:.4f}.pth"
)
print("\n\nSAVED BASED ON VAL ACCURACY!\n\n")
val_time_elapsed = time.time() - val_epoch_since
