# ----------#
for epoch in range(1, args.n_epochs + 1):
encoder.train()
decoder.train()
train_loss = 0
for batch_idx, (data, ) in enumerate(train_loader):
data = data.to(device)
optimizer.zero_grad()
z, mu, logvar = encoder(data)
recon_batch = decoder(z)
loss, rec_loss, kl_loss = loss_function(recon_batch, data, mu, logvar)
loss.backward()
train_loss += loss.item()
optimizer.step()
print(
'Train Epoch: {} [{}/{} ({:.0f}%)]\tLoss: {:.6f} recon_loss:{:.6f} kl_loss:{:.6f}'
.format(epoch, batch_idx * len(data), len(train_loader.dataset),
100. * batch_idx / len(train_loader),
loss.item() / len(data),
rec_loss.item() / len(data),
kl_loss.item() / len(data)))
batches_done = epoch * len(train_loader) + batch_idx
if (epoch) % args.sample_interval == 0:
torch.save(
decoder.state_dict(),
output_dir + f'/decoder_64_VAE_{args.beta_vae}_epoch{epoch}.pth')
torch.save(
encoder.state_dict(),
output_dir + f'/encoder_64_VAE_{args.beta_vae}_epoch{epoch}.pth')
x16_data = x16_data.to(device)
optimizer.zero_grad()
z, mu, logvar = encoder(x64_data)
_, z16, _ = X_l_encoder(encoder_model, x16_data)
z16 = upsample(z16, 16)
z_h = torch.cat((z16, z), 1)
recon_batch = decoder(z_h)
loss, rec_loss, kl_loss = loss_function(recon_batch, x64_data, mu,
logvar)
loss.backward()
train_loss += loss.item()
optimizer.step()
print(
'Train Epoch: {} [{}/{} ({:.0f}%)]\tLoss: {:.6f} recon_loss:{:.6f} kl_loss:{:.6f}'
.format(epoch, batch_idx * len(x64_data),
len(train_loader.dataset),
100. * batch_idx / len(train_loader),
loss.item() / len(x64_data),
rec_loss.item() / len(x64_data),
kl_loss.item() / len(x64_data)))
batches_done = epoch * len(train_loader) + batch_idx
if (epoch) % args.sample_interval == 0:
torch.save(
decoder.state_dict(), output_dir +
f'/decoder_16_64_VAE_0.5_{args.beta_vae}_epoch{epoch}.pth')
torch.save(
encoder.state_dict(), output_dir +
f'/encoder_16_64_VAE_0.5_{args.beta_vae}_epoch{epoch}.pth')
optimizer.zero_grad()
z, mu, logvar = encoder(x64_data)
_, z16, _ = X_l_encoder(encoder_model, x16_data)
z16 = upsample(z16, 16)
z_h = torch.cat((z16, z), 1)
recon_batch = decoder(z_h)
loss, rec_loss, kl_loss = loss_function(recon_batch, x64_data, mu,
logvar)
loss.backward()
train_loss += loss.item()
optimizer.step()
print(
'Train Epoch: {} [{}/{} ({:.0f}%)]\tLoss: {:.6f} recon_loss:{:.6f} kl_loss:{:.6f}'
.format(epoch, batch_idx * len(x64_data),
len(train_loader.dataset),
100. * batch_idx / len(train_loader),
loss.item() / len(x64_data),
rec_loss.item() / len(x64_data),
kl_loss.item() / len(x64_data)))
batches_done = epoch * len(train_loader) + batch_idx
if (epoch) % args.sample_interval == 0:
test(encoder_model, epoch, x64_test, x16_test)
torch.save(
decoder.state_dict(), model_dir +
f'/decoder_16_64_VAE_1_{args.beta_vae}_epoch{epoch}.pth')
torch.save(
encoder.state_dict(), model_dir +
f'/encoder_16_64_VAE_1_{args.beta_vae}_epoch{epoch}.pth')
logvar=logvar.reshape(-1,16)
KLD = torch.sum(-0.5 * torch.sum(1 + logvar - mu.pow(2) - logvar.exp(), dim = 1), dim = 0)
return BCE + args.beta_vae*KLD, BCE , KLD
# ----------#
# Training #
# ----------#
for epoch in range(1,args.n_epochs+1):
encoder.train()
decoder.train()
train_loss = 0
for batch_idx, (data, ) in enumerate(train_loader):
data = data.to(device)
optimizer.zero_grad()
z, mu, logvar = encoder(data)
recon_batch = decoder(z)
loss,rec_loss, kl_loss= loss_function(recon_batch, data, mu, logvar)
loss.backward()
train_loss += loss.item()
optimizer.step()
print('Train Epoch: {} [{}/{} ({:.0f}%)]\tLoss: {:.6f} recon_loss:{:.6f} kl_loss:{:.6f}'.format(
epoch, batch_idx * len(data), len(train_loader.dataset),
100. * batch_idx / len(train_loader),
loss.item() / len(data),rec_loss.item() / len(data),kl_loss.item() / len(data)))
batches_done = epoch * len(train_loader) + batch_idx
if (epoch) % args.sample_interval == 0:
test(epoch,x_test)
torch.save(decoder.state_dict(), model_dir + f'/decoder_16_VAE_{args.beta_vae}_epoch{epoch}.pth')
torch.save(encoder.state_dict(), model_dir + f'/encoder_16_VAE_{args.beta_vae}_epoch{epoch}.pth')