def train(args, loader, generator, discriminator, g_optim, d_optim, g_ema,
device):
loader = sample_data(loader)
pbar = range(args.iter)
if get_rank() == 0:
pbar = tqdm(pbar,
initial=args.start_iter,
ncols=140,
dynamic_ncols=False,
smoothing=0.01)
mean_path_length = 0
d_loss_val = 0
r1_loss = torch.tensor(0.0, device=device)
g_loss_val = 0
path_loss = torch.tensor(0.0, device=device)
path_lengths = torch.tensor(0.0, device=device)
mean_path_length_avg = 0
loss_dict = {}
if args.distributed:
g_module = generator.module
d_module = discriminator.module
else:
g_module = generator
d_module = discriminator
accum = 0.5**(32 / (10 * 1000))
ada_aug_p = args.augment_p if args.augment_p > 0 else 0.0
r_t_stat = 0
if args.augment and args.augment_p == 0:
ada_augment = AdaptiveAugment(args.ada_target, args.ada_length, 8,
device)
sample_z = torch.randn(args.n_sample, args.latent, device=device)
for idx in pbar:
i = idx + args.start_iter
if i > args.iter:
print("Done!")
break
real_img = next(loader)
real_img = real_img.to(device)
requires_grad(generator, False)
requires_grad(discriminator, True)
noise = mixing_noise(args.batch, args.latent, args.mixing, device)
fake_img, _ = generator(noise)
if args.augment:
real_img_aug, _ = augment(real_img, ada_aug_p)
fake_img, _ = augment(fake_img, ada_aug_p)
else:
real_img_aug = real_img
fake_pred = discriminator(fake_img)
real_pred = discriminator(real_img_aug)
d_loss = d_logistic_loss(real_pred, fake_pred)
loss_dict["d"] = d_loss
loss_dict["real_score"] = real_pred.mean()
loss_dict["fake_score"] = fake_pred.mean()
discriminator.zero_grad()
d_loss.backward()
d_optim.step()
if args.augment and args.augment_p == 0:
ada_aug_p = ada_augment.tune(real_pred)
r_t_stat = ada_augment.r_t_stat
d_regularize = i % args.d_reg_every == 0
if d_regularize:
real_img.requires_grad = True
if args.augment:
real_img_aug, _ = augment(real_img, ada_aug_p)
else:
real_img_aug = real_img
real_pred = discriminator(real_img_aug)
r1_loss = d_r1_loss(real_pred, real_img)
discriminator.zero_grad()
(args.r1 / 2 * r1_loss * args.d_reg_every +
0 * real_pred[0]).backward()
d_optim.step()
loss_dict["r1"] = r1_loss
requires_grad(generator, True)
requires_grad(discriminator, False)
noise = mixing_noise(args.batch, args.latent, args.mixing, device)
fake_img, _ = generator(noise)
if args.augment:
fake_img, _ = augment(fake_img, ada_aug_p)
fake_pred = discriminator(fake_img)
g_loss = g_nonsaturating_loss(fake_pred)
loss_dict["g"] = g_loss
generator.zero_grad()
g_loss.backward()
g_optim.step()
g_regularize = i % args.g_reg_every == 0
if g_regularize:
path_batch_size = max(1, args.batch // args.path_batch_shrink)
noise = mixing_noise(path_batch_size, args.latent, args.mixing,
device)
fake_img, latents = generator(noise, return_latents=True)
path_loss, mean_path_length, path_lengths = g_path_regularize(
fake_img, latents, mean_path_length)
generator.zero_grad()
weighted_path_loss = args.path_regularize * args.g_reg_every * path_loss
if args.path_batch_shrink:
weighted_path_loss += 0 * fake_img[0, 0, 0, 0]
weighted_path_loss.backward()
g_optim.step()
mean_path_length_avg = (reduce_sum(mean_path_length).item() /
get_world_size())
loss_dict["path"] = path_loss
loss_dict["path_length"] = path_lengths.mean()
accumulate(g_ema, g_module, accum)
loss_reduced = reduce_loss_dict(loss_dict)
d_loss_val = loss_reduced["d"].mean().item()
g_loss_val = loss_reduced["g"].mean().item()
r1_val = loss_reduced["r1"].mean().item()
path_loss_val = loss_reduced["path"].mean().item()
real_score_val = loss_reduced["real_score"].mean().item()
fake_score_val = loss_reduced["fake_score"].mean().item()
path_length_val = loss_reduced["path_length"].mean().item()
if get_rank() == 0:
pbar.set_description((
f"iter: {i:05d}; d: {d_loss_val:.4f}; g: {g_loss_val:.4f}; r1: {r1_val:.4f}; "
f"path: {path_loss_val:.4f}; mean path: {mean_path_length_avg:.4f}; "
f"augment: {ada_aug_p:.4f}"))
if wandb and args.wandb:
wandb.log({
"Generator": g_loss_val,
"Discriminator": d_loss_val,
"Augment": ada_aug_p,
"Rt": r_t_stat,
"R1": r1_val,
"Path Length Regularization": path_loss_val,
"Mean Path Length": mean_path_length,
"Real Score": real_score_val,
"Fake Score": fake_score_val,
"Path Length": path_length_val,
})
if i % 100 == 0 or (i + 1) == args.iter:
with torch.no_grad():
g_ema.eval()
sample, _ = g_ema([sample_z])
sample = F.interpolate(sample, 256)
utils.save_image(
sample,
f"log/%s/finetune-%06d.jpg" % (args.style, i),
nrow=int(args.n_sample**0.5),
normalize=True,
range=(-1, 1),
)
if (i + 1) % args.save_every == 0 or (i + 1) == args.iter:
torch.save(
{
#"g": g_module.state_dict(),
#"d": d_module.state_dict(),
"g_ema": g_ema.state_dict(),
#"g_optim": g_optim.state_dict(),
#"d_optim": d_optim.state_dict(),
#"args": args,
#"ada_aug_p": ada_aug_p,
},
f"%s/%s/fintune-%06d.pt" %
(args.model_path, args.style, i + 1),
)
def train(args, loader, generator, discriminator, g_optim, d_optim, g_ema,
instyles, Simgs, exstyles, vggloss, id_loss, device):
loader = sample_data(loader)
vgg_weights = [0.0, 0.5, 1.0, 0.0, 0.0]
pbar = range(args.iter)
if get_rank() == 0:
pbar = tqdm(pbar,
initial=args.start_iter,
smoothing=0.01,
ncols=180,
dynamic_ncols=False)
mean_path_length = 0
d_loss_val = 0
r1_loss = torch.tensor(0.0, device=device)
g_loss_val = 0
path_loss = torch.tensor(0.0, device=device)
path_lengths = torch.tensor(0.0, device=device)
mean_path_length_avg = 0
loss_dict = {}
if args.distributed:
g_module = generator.module
d_module = discriminator.module
else:
g_module = generator
d_module = discriminator
accum = 0.5**(32 / (10 * 1000))
ada_aug_p = args.augment_p if args.augment_p > 0 else 0.0
r_t_stat = 0
if args.augment and args.augment_p == 0:
ada_augment = AdaptiveAugment(args.ada_target, args.ada_length, 8,
device)
sample_instyle = torch.randn(args.n_sample, args.latent, device=device)
sample_exstyle, _, _ = get_paired_data(instyles,
Simgs,
exstyles,
batch_size=args.n_sample,
random_ind=8)
sample_exstyle = sample_exstyle.to(device)
for idx in pbar:
i = idx + args.start_iter
which = i % args.subspace_freq # defines whether we use paired data
if i > args.iter:
print("Done!")
break
# sample S
real_img = next(loader)
real_img = real_img.to(device)
requires_grad(generator, False)
requires_grad(discriminator, True)
if which == 0:
# sample z^+_e, z for Lsty, Lcon and Ladv
exstyle, _, _ = get_paired_data(instyles,
Simgs,
exstyles,
batch_size=args.batch,
random_ind=8)
exstyle = exstyle.to(device)
instyle = mixing_noise(args.batch, args.latent, args.mixing,
device)
z_plus_latent = False
else:
# sample z^+_e, z^+_i and S for Eq. (4)
exstyle, instyle, real_img = get_paired_data(instyles,
Simgs,
exstyles,
batch_size=args.batch,
random_ind=8)
exstyle = exstyle.to(device)
instyle = [instyle.to(device)]
real_img = real_img.to(device)
z_plus_latent = True
fake_img, _ = generator(instyle,
exstyle,
use_res=True,
z_plus_latent=z_plus_latent)
if args.augment:
real_img_aug, _ = augment(real_img, ada_aug_p)
fake_img, _ = augment(fake_img, ada_aug_p)
else:
real_img_aug = real_img
fake_pred = discriminator(fake_img)
real_pred = discriminator(real_img_aug)
d_loss = d_logistic_loss(real_pred, fake_pred)
loss_dict["d"] = d_loss # Ladv
loss_dict["real_score"] = real_pred.mean()
loss_dict["fake_score"] = fake_pred.mean()
discriminator.zero_grad()
d_loss.backward()
d_optim.step()
if args.augment and args.augment_p == 0:
ada_aug_p = ada_augment.tune(real_pred)
r_t_stat = ada_augment.r_t_stat
d_regularize = i % args.d_reg_every == 0
if d_regularize:
real_img.requires_grad = True
if args.augment:
real_img_aug, _ = augment(real_img, ada_aug_p)
else:
real_img_aug = real_img
real_pred = discriminator(real_img_aug)
r1_loss = d_r1_loss(real_pred, real_img)
discriminator.zero_grad()
(args.r1 / 2 * r1_loss * args.d_reg_every +
0 * real_pred[0]).backward()
d_optim.step()
loss_dict["r1"] = r1_loss
requires_grad(generator, True)
requires_grad(discriminator, False)
if which == 0:
# sample z^+_e, z for Lsty, Lcon and Ladv
exstyle, _, real_img = get_paired_data(instyles,
Simgs,
exstyles,
batch_size=args.batch,
random_ind=8)
real_img = real_img.to(device)
exstyle = exstyle.to(device)
instyle = mixing_noise(args.batch, args.latent, args.mixing,
device)
z_plus_latent = False
else:
# sample z^+_e, z^+_i and S for Eq. (4)
exstyle, instyle, real_img = get_paired_data(instyles,
Simgs,
exstyles,
batch_size=args.batch,
random_ind=8)
exstyle = exstyle.to(device)
instyle = [instyle.to(device)]
real_img = real_img.to(device)
z_plus_latent = True
fake_img, _ = generator(instyle,
exstyle,
use_res=True,
z_plus_latent=z_plus_latent)
with torch.no_grad():
real_img_256 = F.adaptive_avg_pool2d(real_img, 256).detach()
real_feats = vggloss(real_img_256)
real_styles = [
F.adaptive_avg_pool2d(real_feat, output_size=1).detach()
for real_feat in real_feats
]
real_content, _ = generator(instyle,
None,
use_res=False,
z_plus_latent=z_plus_latent)
real_content_256 = F.adaptive_avg_pool2d(real_content,
256).detach()
fake_img_256 = F.adaptive_avg_pool2d(fake_img, 256)
fake_feats = vggloss(fake_img_256)
fake_styles = [
F.adaptive_avg_pool2d(fake_feat, output_size=1)
for fake_feat in fake_feats
]
sty_loss = (torch.tensor(0.0).to(device) if args.CX_loss == 0 else
FCX.contextual_loss(fake_feats[2],
real_feats[2].detach(),
band_width=0.2,
loss_type='cosine') * args.CX_loss)
if args.style_loss > 0:
sty_loss += ((F.mse_loss(fake_styles[1], real_styles[1]) +
F.mse_loss(fake_styles[2], real_styles[2])) *
args.style_loss)
ID_loss = (torch.tensor(0.0).to(device) if args.id_loss == 0 else
id_loss(fake_img_256, real_content_256) * args.id_loss)
gr_loss = torch.tensor(0.0).to(device)
if which > 0:
for ii, weight in enumerate(vgg_weights):
if weight * args.perc_loss > 0:
gr_loss += F.l1_loss(
fake_feats[ii],
real_feats[ii].detach()) * weight * args.perc_loss
if args.augment:
fake_img, _ = augment(fake_img, ada_aug_p)
fake_pred = discriminator(fake_img)
g_loss = g_nonsaturating_loss(fake_pred)
l2_reg_loss = sum(
torch.norm(p)
for p in g_module.res.parameters()) * args.L2_reg_loss
loss_dict["g"] = g_loss # Ladv
loss_dict["gr"] = gr_loss # Lperc
loss_dict["l2"] = l2_reg_loss # Lreg in Lcon
loss_dict["id"] = ID_loss # LID in Lcon
loss_dict["sty"] = sty_loss # Lsty
g_loss = g_loss + gr_loss + sty_loss + l2_reg_loss + ID_loss
generator.zero_grad()
g_loss.backward()
g_optim.step()
g_regularize = i % args.g_reg_every == 0
if g_regularize:
path_batch_size = max(1, args.batch // args.path_batch_shrink)
instyle = mixing_noise(path_batch_size, args.latent, args.mixing,
device)
exstyle, _, _ = get_paired_data(instyles,
Simgs,
exstyles,
batch_size=path_batch_size,
random_ind=8)
exstyle = exstyle.to(device)
fake_img, latents = generator(instyle,
exstyle,
return_latents=True,
use_res=True,
z_plus_latent=False)
path_loss, mean_path_length, path_lengths = g_path_regularize(
fake_img, latents, mean_path_length)
generator.zero_grad()
weighted_path_loss = args.path_regularize * args.g_reg_every * path_loss
if args.path_batch_shrink:
weighted_path_loss += 0 * fake_img[0, 0, 0, 0]
weighted_path_loss.backward()
g_optim.step()
mean_path_length_avg = (reduce_sum(mean_path_length).item() /
get_world_size())
loss_dict["path"] = path_loss
loss_dict["path_length"] = path_lengths.mean()
accumulate(g_ema.res, g_module.res, accum)
loss_reduced = reduce_loss_dict(loss_dict)
d_loss_val = loss_reduced["d"].mean().item()
g_loss_val = loss_reduced["g"].mean().item()
gr_loss_val = loss_reduced["gr"].mean().item()
sty_loss_val = loss_reduced["sty"].mean().item()
l2_loss_val = loss_reduced["l2"].mean().item()
r1_val = loss_reduced["r1"].mean().item()
id_loss_val = loss_reduced["id"].mean().item()
path_loss_val = loss_reduced["path"].mean().item()
real_score_val = loss_reduced["real_score"].mean().item()
fake_score_val = loss_reduced["fake_score"].mean().item()
path_length_val = loss_reduced["path_length"].mean().item()
if get_rank() == 0:
pbar.set_description((
f"iter: {i:d}; d: {d_loss_val:.3f}; g: {g_loss_val:.3f}; gr: {gr_loss_val:.3f}; sty: {sty_loss_val:.3f}; l2: {l2_loss_val:.3f}; id: {id_loss_val:.3f}; "
f"r1: {r1_val:.3f}; path: {path_loss_val:.3f}; mean path: {mean_path_length_avg:.3f}; "
f"augment: {ada_aug_p:.4f};"))
if i % 100 == 0 or (i + 1) == args.iter:
with torch.no_grad():
g_ema.eval()
sample, _ = g_ema([sample_instyle],
sample_exstyle,
use_res=True)
sample = F.interpolate(sample, 256)
utils.save_image(
sample,
f"log/%s/dualstylegan-%06d.jpg" % (args.style, i),
nrow=int(args.n_sample**0.5),
normalize=True,
range=(-1, 1),
)
if ((i + 1) >= args.save_begin and
(i + 1) % args.save_every == 0) or (i + 1) == args.iter:
torch.save(
{
#"g": g_module.state_dict(),
#"d": d_module.state_dict(),
"g_ema": g_ema.state_dict(),
#"g_optim": g_optim.state_dict(),
#"d_optim": d_optim.state_dict(),
#"args": args,
#"ada_aug_p": ada_aug_p,
},
f"%s/%s/%s-%06d.pt" %
(args.model_path, args.style, args.model_name, i + 1),
)
)
discriminator = nn.parallel.DistributedDataParallel(
discriminator,
device_ids=[args.local_rank],
output_device=args.local_rank,
broadcast_buffers=False,
)
transform = transforms.Compose([
transforms.RandomHorizontalFlip(),
transforms.ToTensor(),
transforms.Normalize((0.5, 0.5, 0.5), (0.5, 0.5, 0.5), inplace=True),
])
dataset = MultiResolutionDataset(args.path, transform, args.size)
loader = data.DataLoader(
dataset,
batch_size=args.batch,
sampler=data_sampler(dataset,
shuffle=True,
distributed=args.distributed),
drop_last=True,
)
if get_rank() == 0 and wandb is not None and args.wandb:
wandb.init(project="stylegan 2")
train(args, loader, generator, discriminator, g_optim, d_optim, g_ema,
device)
def pretrain(args,
loader,
generator,
discriminator,
g_optim,
d_optim,
g_ema,
encoder,
vggloss,
device,
inject_index=5,
savemodel=True):
loader = sample_data(loader)
vgg_weights = [0.5, 0.5, 0.5, 0.0, 0.0]
pbar = range(args.iter)
if get_rank() == 0:
pbar = tqdm(pbar,
initial=args.start_iter,
ncols=140,
dynamic_ncols=False,
smoothing=0.01)
mean_path_length = 0
d_loss_val = 0
r1_loss = torch.tensor(0.0, device=device)
g_loss_val = 0
path_loss = torch.tensor(0.0, device=device)
path_lengths = torch.tensor(0.0, device=device)
mean_path_length_avg = 0
loss_dict = {}
if args.distributed:
g_module = generator.module
d_module = discriminator.module
else:
g_module = generator
d_module = discriminator
accum = 0.5**(32 / (10 * 1000))
ada_aug_p = args.augment_p if args.augment_p > 0 else 0.0
r_t_stat = 0
if args.augment and args.augment_p == 0:
ada_augment = AdaptiveAugment(args.ada_target, args.ada_length, 8,
device)
sample_zs = mixing_noise(args.n_sample, args.latent, 1.0, device)
with torch.no_grad():
source_img, _ = generator([sample_zs[0]],
None,
input_is_latent=False,
z_plus_latent=False,
use_res=False)
source_img = source_img.detach()
target_img, _ = generator(sample_zs,
None,
input_is_latent=False,
z_plus_latent=False,
inject_index=inject_index,
use_res=False)
target_img = target_img.detach()
style_img, _ = generator([sample_zs[1]],
None,
input_is_latent=False,
z_plus_latent=False,
use_res=False)
_, sample_style = encoder(F.adaptive_avg_pool2d(style_img, 256),
randomize_noise=False,
return_latents=True,
z_plus_latent=True,
return_z_plus_latent=False)
sample_style = sample_style.detach()
if get_rank() == 0:
utils.save_image(F.adaptive_avg_pool2d(source_img, 256),
f"log/%s-instyle.jpg" % (args.model_name),
nrow=int(args.n_sample**0.5),
normalize=True,
range=(-1, 1))
utils.save_image(F.adaptive_avg_pool2d(target_img, 256),
f"log/%s-target.jpg" % (args.model_name),
nrow=int(args.n_sample**0.5),
normalize=True,
range=(-1, 1))
utils.save_image(F.adaptive_avg_pool2d(style_img, 256),
f"log/%s-exstyle.jpg" % (args.model_name),
nrow=int(args.n_sample**0.5),
normalize=True,
range=(-1, 1))
for idx in pbar:
i = idx + args.start_iter
which = i % args.subspace_freq
if i > args.iter:
print("Done!")
break
real_img = next(loader)
real_img = real_img.to(device)
# real_zs contains z1 and z2
real_zs = mixing_noise(args.batch, args.latent, 1.0, device)
with torch.no_grad():
# g(z^+_l) with l=inject_index
target_img, _ = generator(real_zs,
None,
input_is_latent=False,
z_plus_latent=False,
inject_index=inject_index,
use_res=False)
target_img = target_img.detach()
# g(z2)
style_img, _ = generator([real_zs[1]],
None,
input_is_latent=False,
z_plus_latent=False,
use_res=False)
style_img = style_img.detach()
# E(g(z2))
_, pspstyle = encoder(F.adaptive_avg_pool2d(style_img, 256),
randomize_noise=False,
return_latents=True,
z_plus_latent=True,
return_z_plus_latent=False)
pspstyle = pspstyle.detach()
requires_grad(generator, False)
requires_grad(discriminator, True)
if which > 0:
# set z~_2 = z2
noise = [real_zs[0]]
externalstyle = g_module.get_latent(real_zs[1]).detach()
z_plus_latent = False
else:
# set z~_2 = E(g(z2))
noise = [real_zs[0].unsqueeze(1).repeat(1, g_module.n_latent, 1)]
externalstyle = pspstyle
z_plus_latent = True
fake_img, _ = generator(noise,
externalstyle,
use_res=True,
z_plus_latent=z_plus_latent)
if args.augment:
real_img_aug, _ = augment(real_img, ada_aug_p)
fake_img, _ = augment(fake_img, ada_aug_p)
else:
real_img_aug = real_img
fake_pred = discriminator(fake_img)
real_pred = discriminator(real_img_aug)
d_loss = d_logistic_loss(real_pred, fake_pred) * 0.1
loss_dict["d"] = d_loss # Ladv
loss_dict["real_score"] = real_pred.mean()
loss_dict["fake_score"] = fake_pred.mean()
discriminator.zero_grad()
d_loss.backward()
d_optim.step()
if args.augment and args.augment_p == 0:
ada_aug_p = ada_augment.tune(real_pred)
r_t_stat = ada_augment.r_t_stat
d_regularize = i % args.d_reg_every == 0
if d_regularize:
real_img.requires_grad = True
if args.augment:
real_img_aug, _ = augment(real_img, ada_aug_p)
else:
real_img_aug = real_img
real_pred = discriminator(real_img_aug)
r1_loss = d_r1_loss(real_pred, real_img)
discriminator.zero_grad()
(args.r1 / 2 * r1_loss * args.d_reg_every +
0 * real_pred[0]).backward()
d_optim.step()
loss_dict["r1"] = r1_loss
requires_grad(generator, True)
requires_grad(discriminator, False)
if which > 0:
# set z~_2 = z2
noise = [real_zs[0]]
externalstyle = g_module.get_latent(real_zs[1]).detach()
z_plus_latent = False
else:
# set z~_2 = E(g(z2))
noise = [real_zs[0].unsqueeze(1).repeat(1, g_module.n_latent, 1)]
externalstyle = pspstyle
z_plus_latent = True
fake_img, _ = generator(noise,
externalstyle,
use_res=True,
z_plus_latent=z_plus_latent)
real_feats = vggloss(F.adaptive_avg_pool2d(target_img, 256).detach())
fake_feats = vggloss(F.adaptive_avg_pool2d(fake_img, 256))
gr_loss = torch.tensor(0.0).to(device)
for ii, weight in enumerate(vgg_weights):
if weight > 0:
gr_loss += F.l1_loss(fake_feats[ii],
real_feats[ii].detach()) * weight
if args.augment:
fake_img, _ = augment(fake_img, ada_aug_p)
fake_pred = discriminator(fake_img)
g_loss = g_nonsaturating_loss(fake_pred) * 0.1
loss_dict["g"] = g_loss # Ladv
loss_dict["gr"] = gr_loss # L_perc
g_loss += gr_loss
generator.zero_grad()
g_loss.backward()
g_optim.step()
g_regularize = i % args.g_reg_every == 0
if g_regularize:
path_batch_size = max(1, args.batch // args.path_batch_shrink)
noise = mixing_noise(path_batch_size, args.latent, args.mixing,
device)
externalstyle = torch.randn(path_batch_size, 512, device=device)
externalstyle = g_module.get_latent(externalstyle).detach()
fake_img, latents = generator(noise,
externalstyle,
return_latents=True,
use_res=True,
z_plus_latent=False)
path_loss, mean_path_length, path_lengths = g_path_regularize(
fake_img, latents, mean_path_length)
generator.zero_grad()
weighted_path_loss = args.path_regularize * args.g_reg_every * path_loss
if args.path_batch_shrink:
weighted_path_loss += 0 * fake_img[0, 0, 0, 0]
weighted_path_loss.backward()
g_optim.step()
mean_path_length_avg = (reduce_sum(mean_path_length).item() /
get_world_size())
loss_dict["path"] = path_loss
loss_dict["path_length"] = path_lengths.mean()
accumulate(g_ema.res, g_module.res, accum)
loss_reduced = reduce_loss_dict(loss_dict)
d_loss_val = loss_reduced["d"].mean().item()
g_loss_val = loss_reduced["g"].mean().item()
gr_loss_val = loss_reduced["gr"].mean().item()
r1_val = loss_reduced["r1"].mean().item()
path_loss_val = loss_reduced["path"].mean().item()
real_score_val = loss_reduced["real_score"].mean().item()
fake_score_val = loss_reduced["fake_score"].mean().item()
path_length_val = loss_reduced["path_length"].mean().item()
if get_rank() == 0:
pbar.set_description((
f"iter: {i:d}; d: {d_loss_val:.3f}; g: {g_loss_val:.3f}; gr: {gr_loss_val:.3f}; r1: {r1_val:.3f}; "
f"path: {path_loss_val:.3f}; mean path: {mean_path_length_avg:.3f}; "
f"augment: {ada_aug_p:.1f}"))
if i % 300 == 0 or (i + 1) == args.iter:
with torch.no_grad():
g_ema.eval()
sample, _ = g_ema([
sample_zs[0].unsqueeze(1).repeat(
1, g_module.n_latent, 1)
],
sample_style,
use_res=True,
z_plus_latent=True)
sample = F.interpolate(sample, 256)
utils.save_image(
sample,
f"log/%s-%06d.jpg" % (args.model_name, i),
nrow=int(args.n_sample**0.5),
normalize=True,
range=(-1, 1),
)
if savemodel and ((i + 1) % args.save_every == 0 or
(i + 1) == args.iter):
torch.save(
{
"g": g_module.state_dict(),
"d": d_module.state_dict(),
"g_ema": g_ema.state_dict(),
"g_optim": g_optim.state_dict(),
"d_optim": d_optim.state_dict(),
"args": args,
"ada_aug_p": ada_aug_p,
},
f"%s/%s-%06d.pt" %
(args.model_path, args.model_name, i + 1),
)