def pruning():
# Training DataLoader
dataset_train = ZipDataset([
ZipDataset([
ImagesDataset(DATA_PATH[args.dataset_name]['train']['pha'],
mode='L'),
ImagesDataset(DATA_PATH[args.dataset_name]['train']['fgr'],
mode='RGB'),
],
transforms=A.PairCompose([
A.PairRandomAffineAndResize((512, 512),
degrees=(-5, 5),
translate=(0.1, 0.1),
scale=(0.4, 1),
shear=(-5, 5)),
A.PairRandomHorizontalFlip(),
A.PairRandomBoxBlur(0.1, 5),
A.PairRandomSharpen(0.1),
A.PairApplyOnlyAtIndices([1],
T.ColorJitter(
0.15, 0.15, 0.15, 0.05)),
A.PairApply(T.ToTensor())
]),
assert_equal_length=True),
ImagesDataset(DATA_PATH['backgrounds']['train'],
mode='RGB',
transforms=T.Compose([
A.RandomAffineAndResize((512, 512),
degrees=(-5, 5),
translate=(0.1, 0.1),
scale=(1, 2),
shear=(-5, 5)),
T.RandomHorizontalFlip(),
A.RandomBoxBlur(0.1, 5),
A.RandomSharpen(0.1),
T.ColorJitter(0.15, 0.15, 0.15, 0.05),
T.ToTensor()
])),
])
dataloader_train = DataLoader(dataset_train,
shuffle=True,
batch_size=args.batch_size,
num_workers=args.num_workers,
pin_memory=True)
# Validation DataLoader
dataset_valid = ZipDataset([
ZipDataset([
ImagesDataset(DATA_PATH[args.dataset_name]['valid']['pha'],
mode='L'),
ImagesDataset(DATA_PATH[args.dataset_name]['valid']['fgr'],
mode='RGB')
],
transforms=A.PairCompose([
A.PairRandomAffineAndResize((512, 512),
degrees=(-5, 5),
translate=(0.1, 0.1),
scale=(0.3, 1),
shear=(-5, 5)),
A.PairApply(T.ToTensor())
]),
assert_equal_length=True),
ImagesDataset(DATA_PATH['backgrounds']['valid'],
mode='RGB',
transforms=T.Compose([
A.RandomAffineAndResize((512, 512),
degrees=(-5, 5),
translate=(0.1, 0.1),
scale=(1, 1.2),
shear=(-5, 5)),
T.ToTensor()
])),
])
dataset_valid = SampleDataset(dataset_valid, 50)
dataloader_valid = DataLoader(dataset_valid,
pin_memory=True,
batch_size=args.batch_size,
num_workers=args.num_workers)
# Model
model = MattingBase(args.model_backbone).cuda()
if args.model_last_checkpoint is not None:
load_matched_state_dict(model, torch.load(args.model_last_checkpoint))
elif args.model_pretrain_initialization is not None:
model.load_pretrained_deeplabv3_state_dict(
torch.load(args.model_pretrain_initialization)['model_state'])
# 打印初试稀疏率
# for name, module in model.named_modules():
# # prune 10% of connections in all 2D-conv layers
# if isinstance(module, torch.nn.Conv2d):
# # DNSUnst(module, name='weight')
# prune.l1_unstructured(module, name='weight', amount=0.4)
# prune.remove(module, 'weight')
print("the original sparsity: ", get_sparsity(model))
optimizer = Adam([{
'params': model.backbone.parameters(),
'lr': 1e-4
}, {
'params': model.aspp.parameters(),
'lr': 5e-4
}, {
'params': model.decoder.parameters(),
'lr': 5e-4
}])
scaler = GradScaler()
# Logging and checkpoints
if not os.path.exists(f'checkpoint/{args.model_name}'):
os.makedirs(f'checkpoint/{args.model_name}')
writer = SummaryWriter(f'log/{args.model_name}')
# Run loop
for epoch in range(args.epoch_start, args.epoch_end):
for i, ((true_pha, true_fgr),
true_bgr) in enumerate(tqdm(dataloader_train)):
step = epoch * len(dataloader_train) + i
true_pha = true_pha.cuda(non_blocking=True)
true_fgr = true_fgr.cuda(non_blocking=True)
true_bgr = true_bgr.cuda(non_blocking=True)
true_pha, true_fgr, true_bgr = random_crop(true_pha, true_fgr,
true_bgr)
true_src = true_bgr.clone()
# Augment with shadow
aug_shadow_idx = torch.rand(len(true_src)) < 0.3
if aug_shadow_idx.any():
aug_shadow = true_pha[aug_shadow_idx].mul(0.3 *
random.random())
aug_shadow = T.RandomAffine(degrees=(-5, 5),
translate=(0.2, 0.2),
scale=(0.5, 1.5),
shear=(-5, 5))(aug_shadow)
aug_shadow = kornia.filters.box_blur(
aug_shadow, (random.choice(range(20, 40)), ) * 2)
true_src[aug_shadow_idx] = true_src[aug_shadow_idx].sub_(
aug_shadow).clamp_(0, 1)
del aug_shadow
del aug_shadow_idx
# Composite foreground onto source
true_src = true_fgr * true_pha + true_src * (1 - true_pha)
# Augment with noise
aug_noise_idx = torch.rand(len(true_src)) < 0.4
if aug_noise_idx.any():
true_src[aug_noise_idx] = true_src[aug_noise_idx].add_(
torch.randn_like(true_src[aug_noise_idx]).mul_(
0.03 * random.random())).clamp_(0, 1)
true_bgr[aug_noise_idx] = true_bgr[aug_noise_idx].add_(
torch.randn_like(true_bgr[aug_noise_idx]).mul_(
0.03 * random.random())).clamp_(0, 1)
del aug_noise_idx
# Augment background with jitter
aug_jitter_idx = torch.rand(len(true_src)) < 0.8
if aug_jitter_idx.any():
true_bgr[aug_jitter_idx] = kornia.augmentation.ColorJitter(
0.18, 0.18, 0.18, 0.1)(true_bgr[aug_jitter_idx])
del aug_jitter_idx
# Augment background with affine
aug_affine_idx = torch.rand(len(true_bgr)) < 0.3
if aug_affine_idx.any():
true_bgr[aug_affine_idx] = T.RandomAffine(
degrees=(-1, 1),
translate=(0.01, 0.01))(true_bgr[aug_affine_idx])
del aug_affine_idx
with autocast():
pred_pha, pred_fgr, pred_err = model(true_src, true_bgr)[:3]
loss = compute_loss(pred_pha, pred_fgr, pred_err, true_pha,
true_fgr)
scaler.scale(loss).backward()
# 剪枝
best_c = np.zeros(187)
if i == 0:
ncs = NCS_C(model, true_src, true_bgr, true_pha, true_fgr)
best_c = ncs.run(model, true_src, true_bgr, true_pha, true_fgr)
PreTPUnst(model, best_c)
else:
# 调整
PreDNSUnst(model, best_c)
scaler.step(optimizer)
Pruned(model)
scaler.update()
optimizer.zero_grad()
if (i + 1) % args.log_train_loss_interval == 0:
writer.add_scalar('loss', loss, step)
if (i + 1) % args.log_train_images_interval == 0:
writer.add_image('train_pred_pha', make_grid(pred_pha, nrow=5),
step)
writer.add_image('train_pred_fgr', make_grid(pred_fgr, nrow=5),
step)
writer.add_image('train_pred_com',
make_grid(pred_fgr * pred_pha, nrow=5), step)
writer.add_image('train_pred_err', make_grid(pred_err, nrow=5),
step)
writer.add_image('train_true_src', make_grid(true_src, nrow=5),
step)
writer.add_image('train_true_bgr', make_grid(true_bgr, nrow=5),
step)
del true_pha, true_fgr, true_bgr, true_src
del pred_pha, pred_fgr, pred_err
del loss
del best_c
if (i + 1) % args.log_valid_interval == 0:
valid(model, dataloader_valid, writer, step)
if (step + 1) % args.checkpoint_interval == 0:
torch.save(
model.state_dict(),
f'checkpoint/{args.model_name}/epoch-{epoch}-iter-{step}.pth'
)
print("the sparsity of epoch {} : {}".format(epoch,
get_sparsity(model)))
torch.save(model.state_dict(),
f'checkpoint/{args.model_name}/epoch-{epoch}.pth')
# 打印最终的稀疏度
print("the final sparsity: ", get_sparsity(model))
args.model_refine_sample_pixels,
args.model_refine_threshold,
args.model_refine_kernel_size)
model = model.to(device).eval()
model.load_state_dict(torch.load(args.model_checkpoint, map_location=device),
strict=False)
# Load video and background
vid = VideoDataset(args.video_src)
bgr = [Image.open(args.video_bgr).convert('RGB')]
dataset = ZipDataset([vid, bgr],
transforms=A.PairCompose([
A.PairApply(
T.Resize(args.video_resize[::-1]) if args.
video_resize else nn.Identity()),
HomographicAlignment() if args.preprocess_alignment
else A.PairApply(nn.Identity()),
A.PairApply(T.ToTensor())
]))
if args.video_target_bgr:
dataset = ZipDataset([
dataset,
VideoDataset(args.video_target_bgr, transforms=T.ToTensor())
])
# Create output directory
if os.path.exists(args.output_dir):
if input(f'Directory {args.output_dir} already exists. Override? [Y/N]: '
).lower() == 'y':
shutil.rmtree(args.output_dir)
else:
args.model_refine_threshold,
args.model_refine_kernel_size)
model = model.to(device).eval()
model.load_state_dict(torch.load(args.model_checkpoint, map_location=device),
strict=False)
# Load images
dataset = ZipDataset([
ImagesDataset(args.images_src),
ImagesDataset(args.images_bgr),
],
assert_equal_length=True,
transforms=A.PairCompose([
HomographicAlignment() if args.preprocess_alignment
else A.PairApply(nn.Identity()),
A.PairApply(T.ToTensor())
]))
dataloader = DataLoader(dataset,
batch_size=1,
num_workers=args.num_workers,
pin_memory=True)
# Create output directory
if os.path.exists(args.output_dir):
if args.y or input(
f'Directory {args.output_dir} already exists. Override? [Y/N]: '
).lower() == 'y':
shutil.rmtree(args.output_dir)
else:
exit()
args.model_refine_kernel_size)
model = model.to(device).eval()
model.load_state_dict(torch.load(args.model_checkpoint, map_location=device),
strict=False)
# Validation DataLoader
dataset_valid = ZipDataset([
ZipDataset([
ImagesDataset(DATA_PATH[args.dataset_name]['valid']['pha'], mode='L'),
ImagesDataset(DATA_PATH[args.dataset_name]['valid']['fgr'], mode='RGB')
],
transforms=A.PairCompose([
A.PairRandomAffineAndResize((512, 512),
degrees=(-5, 5),
translate=(0.1, 0.1),
scale=(0.3, 1),
shear=(-5, 5)),
A.PairApply(T.ToTensor())
]),
assert_equal_length=True),
ImagesDataset(DATA_PATH['backgrounds']['valid'],
mode='RGB',
transforms=T.Compose([
A.RandomAffineAndResize((512, 512),
degrees=(-5, 5),
translate=(0.1, 0.1),
scale=(1, 1.2),
shear=(-5, 5)),
T.ToTensor()
])),
])
def train_worker(rank, addr, port):
# Distributed Setup
os.environ['MASTER_ADDR'] = addr
os.environ['MASTER_PORT'] = port
dist.init_process_group("nccl", rank=rank, world_size=distributed_num_gpus)
# Training DataLoader
dataset_train = ZipDataset([
ZipDataset([
ImagesDataset(DATA_PATH[args.dataset_name]
['train']['pha'], mode='L'),
ImagesDataset(DATA_PATH[args.dataset_name]
['train']['fgr'], mode='RGB'),
], transforms=A.PairCompose([
A.PairRandomAffineAndResize(
(2048, 2048), degrees=(-5, 5), translate=(0.1, 0.1), scale=(0.3, 1), shear=(-5, 5)),
A.PairRandomHorizontalFlip(),
A.PairRandomBoxBlur(0.1, 5),
A.PairRandomSharpen(0.1),
A.PairApplyOnlyAtIndices(
[1], T.ColorJitter(0.15, 0.15, 0.15, 0.05)),
A.PairApply(T.ToTensor())
]), assert_equal_length=True),
ImagesDataset(DATA_PATH['backgrounds']['train'], mode='RGB', transforms=T.Compose([
A.RandomAffineAndResize(
(2048, 2048), degrees=(-5, 5), translate=(0.1, 0.1), scale=(1, 2), shear=(-5, 5)),
T.RandomHorizontalFlip(),
A.RandomBoxBlur(0.1, 5),
A.RandomSharpen(0.1),
T.ColorJitter(0.15, 0.15, 0.15, 0.05),
T.ToTensor()
])),
])
dataset_train_len_per_gpu_worker = int(
len(dataset_train) / distributed_num_gpus)
dataset_train = Subset(dataset_train, range(
rank * dataset_train_len_per_gpu_worker, (rank + 1) * dataset_train_len_per_gpu_worker))
dataloader_train = DataLoader(dataset_train,
shuffle=True,
pin_memory=True,
drop_last=True,
batch_size=args.batch_size // distributed_num_gpus,
num_workers=args.num_workers // distributed_num_gpus)
# Validation DataLoader
if rank == 0:
dataset_valid = ZipDataset([
ZipDataset([
ImagesDataset(DATA_PATH[args.dataset_name]
['valid']['pha'], mode='L'),
ImagesDataset(DATA_PATH[args.dataset_name]
['valid']['fgr'], mode='RGB')
], transforms=A.PairCompose([
A.PairRandomAffineAndResize(
(2048, 2048), degrees=(-5, 5), translate=(0.1, 0.1), scale=(0.3, 1), shear=(-5, 5)),
A.PairApply(T.ToTensor())
]), assert_equal_length=True),
ImagesDataset(DATA_PATH['backgrounds']['valid'], mode='RGB', transforms=T.Compose([
A.RandomAffineAndResize(
(2048, 2048), degrees=(-5, 5), translate=(0.1, 0.1), scale=(1, 1.2), shear=(-5, 5)),
T.ToTensor()
])),
])
dataset_valid = SampleDataset(dataset_valid, 50)
dataloader_valid = DataLoader(dataset_valid,
pin_memory=True,
drop_last=True,
batch_size=args.batch_size // distributed_num_gpus,
num_workers=args.num_workers // distributed_num_gpus)
# Model
model = MattingRefine(args.model_backbone,
args.model_backbone_scale,
args.model_refine_mode,
args.model_refine_sample_pixels,
args.model_refine_thresholding,
args.model_refine_kernel_size).to(rank)
model = nn.SyncBatchNorm.convert_sync_batchnorm(model)
model_distributed = nn.parallel.DistributedDataParallel(
model, device_ids=[rank])
if args.model_last_checkpoint is not None:
load_matched_state_dict(model, torch.load(args.model_last_checkpoint))
optimizer = Adam([
{'params': model.backbone.parameters(), 'lr': 5e-5},
{'params': model.aspp.parameters(), 'lr': 5e-5},
{'params': model.decoder.parameters(), 'lr': 1e-4},
{'params': model.refiner.parameters(), 'lr': 3e-4},
])
scaler = GradScaler()
# Logging and checkpoints
if rank == 0:
if not os.path.exists(f'checkpoint/{args.model_name}'):
os.makedirs(f'checkpoint/{args.model_name}')
writer = SummaryWriter(f'log/{args.model_name}')
# Run loop
for epoch in range(args.epoch_start, args.epoch_end):
for i, ((true_pha, true_fgr), true_bgr) in enumerate(tqdm(dataloader_train)):
step = epoch * len(dataloader_train) + i
true_pha = true_pha.to(rank, non_blocking=True)
true_fgr = true_fgr.to(rank, non_blocking=True)
true_bgr = true_bgr.to(rank, non_blocking=True)
true_pha, true_fgr, true_bgr = random_crop(
true_pha, true_fgr, true_bgr)
true_src = true_bgr.clone()
# Augment with shadow
aug_shadow_idx = torch.rand(len(true_src)) < 0.3
if aug_shadow_idx.any():
aug_shadow = true_pha[aug_shadow_idx].mul(
0.3 * random.random())
aug_shadow = T.RandomAffine(
degrees=(-5, 5), translate=(0.2, 0.2), scale=(0.5, 1.5), shear=(-5, 5))(aug_shadow)
aug_shadow = kornia.filters.box_blur(
aug_shadow, (random.choice(range(20, 40)),) * 2)
true_src[aug_shadow_idx] = true_src[aug_shadow_idx].sub_(
aug_shadow).clamp_(0, 1)
del aug_shadow
del aug_shadow_idx
# Composite foreground onto source
true_src = true_fgr * true_pha + true_src * (1 - true_pha)
# Augment with noise
aug_noise_idx = torch.rand(len(true_src)) < 0.4
if aug_noise_idx.any():
true_src[aug_noise_idx] = true_src[aug_noise_idx].add_(torch.randn_like(
true_src[aug_noise_idx]).mul_(0.03 * random.random())).clamp_(0, 1)
true_bgr[aug_noise_idx] = true_bgr[aug_noise_idx].add_(torch.randn_like(
true_bgr[aug_noise_idx]).mul_(0.03 * random.random())).clamp_(0, 1)
del aug_noise_idx
# Augment background with jitter
aug_jitter_idx = torch.rand(len(true_src)) < 0.8
if aug_jitter_idx.any():
true_bgr[aug_jitter_idx] = kornia.augmentation.ColorJitter(
0.18, 0.18, 0.18, 0.1)(true_bgr[aug_jitter_idx])
del aug_jitter_idx
# Augment background with affine
aug_affine_idx = torch.rand(len(true_bgr)) < 0.3
if aug_affine_idx.any():
true_bgr[aug_affine_idx] = T.RandomAffine(
degrees=(-1, 1), translate=(0.01, 0.01))(true_bgr[aug_affine_idx])
del aug_affine_idx
with autocast():
pred_pha, pred_fgr, pred_pha_sm, pred_fgr_sm, pred_err_sm, _ = model_distributed(
true_src, true_bgr)
loss = compute_loss(
pred_pha, pred_fgr, pred_pha_sm, pred_fgr_sm, pred_err_sm, true_pha, true_fgr)
scaler.scale(loss).backward()
scaler.step(optimizer)
scaler.update()
optimizer.zero_grad()
if rank == 0:
if (i + 1) % args.log_train_loss_interval == 0:
writer.add_scalar('loss', loss, step)
if (i + 1) % args.log_train_images_interval == 0:
writer.add_image('train_pred_pha',
make_grid(pred_pha, nrow=5), step)
writer.add_image('train_pred_fgr',
make_grid(pred_fgr, nrow=5), step)
writer.add_image('train_pred_com', make_grid(
pred_fgr * pred_pha, nrow=5), step)
writer.add_image('train_pred_err', make_grid(
pred_err_sm, nrow=5), step)
writer.add_image('train_true_src',
make_grid(true_src, nrow=5), step)
del true_pha, true_fgr, true_src, true_bgr
del pred_pha, pred_fgr, pred_pha_sm, pred_fgr_sm, pred_err_sm
if (i + 1) % args.log_valid_interval == 0:
valid(model, dataloader_valid, writer, step)
if (step + 1) % args.checkpoint_interval == 0:
torch.save(model.state_dict(
), f'checkpoint/{args.model_name}/epoch-{epoch}-iter-{step}.pth')
if rank == 0:
torch.save(model.state_dict(),
f'checkpoint/{args.model_name}/epoch-{epoch}.pth')
# Clean up
dist.destroy_process_group()